BOGEN NQ-GA20P2 Nyquist 20W PoE Plus Integrated Power Amplifier User Guide

BOGEN NQ-GA20P2 Nyquist 20W PoE Plus Integrated Power Amplifier

Product Information

The 20W PoE+ Integrated Power Amplifier (NQ-GA20P2) is a device that allows users to configure and control the Nyquist Integrated Power Amplifier. It comes with a web-based user interface (UI) that can be accessed through a web browser. The device is equipped with a Bogen Certification Authority (CA) digital certificate to ensure secure communication.

List of Figures

• Figure 1: Nyquist Appliance Login
• Figure 2: NQ-GA20P2 Dashboard
• Figure 3
• Figure 4
• Figure 5
• Figure 6
• Figure 7
• Figure 8
• Figure 9
• Figure 10
• Figure 11
• Figure 12
• Figure 13
• Figure 14
• Figure 15

List of Tables

• Table 1: Appliance Dashboard Fields
• Table 2: Appliance Dashboard Buttons
• Table 3
• Table 4
• Table 5
• Table 6
• Table 7
• Table 8
• Table 9
• Table 10
• Table 11
• Table 12
• Table 13

Product Usage Instructions

Accessing the Web-based User Interface (UI)

1. Before accessing the web UI for the first time, ensure that the Bogen Certification Authority (CA) digital certificate is installed on your client computer. You can download the certificate from any Nyquist appliance.
2. To download and install the certificate, refer to the “Installing the Bogen Digital Certification Authority” section on page 38 of the user manual.
3. To access the appliance’s web UI, you can either:
   • Enter the IP address of the appliance as the URL in your web browser.
   • From the Nyquist server’s web UI navigation bar, select “Stations” and then choose “Stations Status” or “Appliance Status”. Navigate to the device you want to configure and select the Link icon.
4. On the Nyquist appliance’s Login page, enter your username and password. The default username is “admin” and the default password is “bogen”. Press enter or click on the Login button.
5. Note: If you are still using the default password, a warning will be displayed. It is strongly recommended to change the default password as soon as possible.
6. Upon successful login, you will be presented with the dashboard for the appliance.

Using the Dashboard
The dashboard provides an overview of important information and options for configuring the device.

Appliance Dashboard Fields

unique identifier assigned to network interfaces for communications
on the physical network segment.
Firmware Version| Identifies the firmware version installed on the device.
Standalone Operation| Enables or disables Standalone mode.

Appliance Dashboard Buttons

view and
set various options. If Standalone Operation is not enabled, you
can also receive configuration settings from a Nyquist server.
Network Settings| Accesses the Network Settings page where you can view and set
network settings, such as the static IP address.
Firmware Update| Accesses the Firmware Update page where you can view the
current Nyquist version, update firmware to a new version, restore
the configuration to factory defaults, and reboot the
appliance.
Logs| Accesses log files, which record events or messages that occur
when software runs and are used for troubleshooting the
appliance.

20W PoE+ Integrated Power Amplifier Configuration Guide
NQ-GA20P2
© 2019 Bogen Communications LLC All rights reserved 740-00074B 230421

Configuring the Nyquist Integrated Power Amplifier
The NQ-GA20P2 is a plenum-rated Nyquist 20W integrated power amplifier. It works as a page zone extender to facilitate voice access to a single zone of one-way paging over the Nyquist network. It also works in background music applications, leveraging the exhaustive audio management and distribution capabilities of Bogen’s Nyquist platform. The NQ-GA20P2 appliance uses the latest in Class D amplifier technology and provides unparalleled sonic quality, exceptional reliability, and reduced power consumption to permit standalone PoE+ operation over the local network. The Nyquist server or System Controller can automatically discover and configure the NQ-GA20P2, but you can also manage the device, and manually configure some settings, through the appliance’s web-based user interface (web UI). It can also operate in Standalone mode, allowing it to be used without a Nyquist server. A two-second press of the appliance’s Reset button reboots the device. If you press the Reset button for 10 seconds, the appliance returns to the factory default configuration settings. Returning to the default configuration settings does not change the appliance’s firmware. The following sections describe the process for manual configuration. For information about using Nyquist’s automatic configuration process, refer to the appropriate Nyquist System Administrator Guide.
Note: Do not use third-party Chrome browser extensions with the Nyquist user interface.
To access the appliance’s Web-based user interface (UI):
1 Before accessing the web UI for the first time, the Bogen Certification Authority (CA) digital certificate must be installed on the client. This certificate can be downloaded from any Nyquist appliance and enables your browser to recognize the Nyquist web application as a trusted site.
For details on how to download and install the certificate to your client computers, see “Installing the Bogen Digital Certification Authority” on page 38.
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2 Access the appliance’s web UI by doing one of the following: a) On your web browser, enter the IP address for the appliance as the URL. b) From the Nyquist server’s web UI navigation bar, select Stations, select Stations Status or Appliance Status, navigate to the device that you want to configure, and then select the Link icon.
Figure 1. Nyquist Appliance Login
3 At the Nyquist appliance’s Login page, enter username and password, then press enter or click on the Login button. The default username is admin; the default password is bogen.
Note: After a successful login, a warning will be displayed if the default password is still in use. We strongly encourage changing the default password as soon as possible. When you have logged in successfully, you will be presented with the dashboard for the appliance.
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Figure 2. NQ-GA20P2 Dashboard

Using the Dashboard

The dashboard displays the following fields:

Table 1. Appliance Dashboard Fields

Device Type

Identifies the model of this device.

Serial Number MAC Address

Identifies the serial number for the device.
Identifies the Media Access Control (MAC) address, which is a unique identifier assigned to network interfaces for communications on the physical network segment.

Firmware Version

Identifies the firmware version installed on the device.

Standalone Operation

Enables or disables Standalone mode.

The following buttons are available at the top of all pages in the application.

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Table 2. Appliance Dashboard Buttons

Dashboard

Displays the dashboard.

Configuration Settings Network Settings Firmware Update Logs

Accesses the Configuration Settings page where you can view and set various options. If Standalone Operation is not enabled, you can also receive configuration settings from a Nyquist server.
Accesses the Network Settings page where you can view and set network settings, such as the static IP address.
Accesses the Firmware Update page where you can view the current Nyquist version, update firmware to a new version, restore the configuration to factory defaults, and reboot the appliance.
Accesses log files, which record either events or messages that occur when software runs and are used when troubleshooting the appliance.

DSP

Accesses the DSP page where you can view and set

parameters for Digital Signal Processing (DSP).

Help Manual Logout

Accesses the appliance’s online help. Displays this appliance’s configuration guide. Logs out of the appliance’s web UI.

Standalone Operation

This device can also run in Standalone Operation mode, where it will not interact with a Nyquist server (e.g., E7000 or C4000). This means the device will not: · Fetch device configuration from Nyquist server · Register with Nyquist server (via SIP) · Store backup information to Nyquist server · Allow access to Nyquist server-based NTP Standalone Operation allows this device it to be used without a Nyquist server as a generic SIP endpoint when integrated with a 3rd-party VoIP telephone system or other SIP server-based solutions, such as a unified communications (UC) platform. In a non-SIP
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environment, these devices are capable of receiving audio through one or more prioritized multicast channels.
Updating Firmware
When you select Firmware Update from the appliance’s web UI, the Firmware Update page appears. From this page you can determine which Nyquist firmware version the appliance is using and if an update is available. You can also load a firmware release, install the loaded firmware, restore the configuration to factory defaults, and reboot the appliance. Note: A Nyquist appliance connected to the Nyquist network receives a configuration file from the Nyquist server that includes the latest firmware available from the server. If the firmware is different from the one installed on the appliance, an automatic firmware update occurs unless the Firmware parameter for the station is left blank. Refer to the Nyquist System Administrator Guide for more information.
Note: Some buttons only appear on this page when applicable. Figure 3. Firmware Update Page
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To use the Firmware Update page: 1 On the appliance web UI’s main page, select Firmware Update to view or update the
firmware version. · If the device is in Standalone mode, the Check for Updates button will be shown.
Selecting it checks the Bogen website for the latest firmware version available. If a version newer than the one currently installed is found, it is downloaded to the appliance and the Update Firmware button will be shown. · If you already have a firmware file you would like to install to the appliance, select Upload Firmware to upload the firmware file from your computer to the appliance. A popup screen appears that allows you to select the file that you want to upload. You can navigate to the file’s location. After you select the file, select Upload. The page displays the uploaded firmware version (“New Nyquist Version”) and an Update Firmware button appears. Select this button if you want to update the appliance’s firmware to the uploaded version. · If you want to return your appliance to its original factory configuration, select Restore Factory Settings. · Select Reboot Appliance to restart your appliance.
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Table 3. Firmware Update settings

Current Nyquist Version

Shows the version of the appliance’s currently installed firmware.

New Nyquist Version

Shows the version of the firmware that has been loaded, though not installed, onto the appliance.

Update Firmware

Available only when a new firmware version has been loaded onto the appliance (as specified in New Nyquist Version).

Installs the loaded firmware. A reboot may be required after installation.

Upload Firmware

Prompts the user to specify a firmware file, which will then be loaded (though not installed) onto the appliance.

Check for Updates

Note: To obtain the firmware file for a specific version, please contact Bogen Technical Support.
Available only when the appliance is configured for Standalone mode.

Checks the Bogen website for the latest firmware version available and, if it finds a version newer than what is currently installed, downloads it to the appliance.

Restore Factory Settings

Note: Ensure your Nyquist appliance has network access to bogen-ssu.bogen.com, port 22.
Returns the appliance to its original factory configuration.

Reboot Appliance

Note: This does not install the original appliance firmware. The firmware will not be changed.
Restarts the appliance.

Network Settings Tab Parameters
Network settings can be configured dynamically by the Nyquist server or manually by using the appliance’s web UI.

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To manually configure network settings: 1 On the appliance web UI’s main page, select Network Settings. 2 Select your desired network settings. 3 Select Save.
Figure 4. Network Settings
Network settings are described in the following table:
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IP Address Netmask Gateway VLAN ID VLAN Priority NTP Server
TFTP Server

Table 4. Network Settings
Identifies the IP address assigned to the appliance.
Identifies the subnetwork subdivision of an IP network.
Identifies the address, or route, for the default gateway.
Identifies the Virtual Local Area Network (VLAN) for this appliance. Values range from 0 to 4094.
Identifies the priority of the network traffic on the VLAN. Priority can range from 0 through 7.
Identifies the IP address or the domain name of the Network Time Protocol (NTP) Server.
Note: This field is only editable when Standalone Operation is enabled.
Identifies the host name or IP address of the Trivial File Transfer Protocol (TFTP) server.
The specified TFTP server can be used to automatically set this device’s Configuration settings via the Get Configuration from Server button.
If TFTP Server from DHCP (see below) is set to “Yes”, this value will be auto- configured via DHCP option 66, assuming the DHCP server has been configured to provide option 66. For details, see the documentation for your DHCP server.
Note: A TFTP server runs on the Nyquist server on port 69 (the standard TFTP port) and the optional Nyquist DHCP service automatically provides this TFTP address via option 66.
Note: If this value is unspecified, the TFTP Server from DHCP will automatically be set to “Yes”, this field will become readonly, and DHCP will be used to configure this setting. To change this value, the TFTP Server from DHCP setting must be set to No, which makes the field editable.
Note: This setting is not available when Standalone Operation is enabled.

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Table 4. Network Settings (Continued)

TFTP Server from DHCP

“Yes” means the device will use the DHCP option 66 value to retrieve an address for the TFTP Server from DHCP.

“No” means the device will ignore the DHCP option 66 value and use the manually configured value of the TFTP Server (see above).

DHCP Enabled

Note: This setting is not available when Standalone Operation is enabled.
Indicates if the device is enabled to use DHCP to retrieve its IP configuration.

Reboot Appliance

Indicates that this appliance should reboot when the Save button is clicked.

Configuration Settings Tab Parameters
The easiest way to configure Nyquist appliances is to obtain configuration settings from the Nyquist server by selecting Get Configuration From Server. However, you can manually configure an appliance through the appliance’s Web UI when Standalone Operation is enabled (see “Standalone Operation Configuration Settings” on page 13).
To view the Nyquist appliance configuration:
1 On the appliance Web UI’s main page, select Configuration Settings.
2 View the settings as described in Table 5 on page 12 for normal configuration, or modify the settings as described in “Standalone Operation Configuration Settings” on page 13 for Standalone Operation configuration.
3 If changes were made (Standalone Operation only), click the Save Configuration Settings and/or Save Multicast Addresses buttons to save your changes.

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Figure 5. Appliance Configuration Settings (Standalone disabled)
The following table describes the Configuration Settings tab settings when Standalone Operation is not enabled for this device:
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Table 5. Configuration Settings (Standalone disabled)

Get Configuration from Server

Retrieves configuration settings (i.e., web username, server, and local port) from the TFTP server specified in the Network Settings (see “Network Settings Tab Parameters” on page 6).

Web Username

Identifies the web username for this appliance.

Emergency-All-Call

Identifies the IP address, port number, cut level (volume), and station list used for emergency all-call pages.

All-Call

Identifies the IP address, port number, cut level (volume), and station list used for all-call pages.

Audio Distribution

Identifies the IP address, port number, cut level (volume), and station list used for audio distribution.

Multicast #

Identifies the IP address, port number, cut level (volume), and station list used for the multicast audio stream of one (or more) zones.

Nyquist Control Password

Specifies a password used to secure Nyquist control messages between this device and the Nyquist controller. This value must match the password specified on the Nyquist controller to support certain Nyquist features, such as sound masking, amp protection mode, and station check-in.

The specified password must be exactly 20 characters long and include uppercase, lowercase, and numeric characters.

Note: This password cannot be set unless the Web Password has been changed from the default value.

The Configuration Settings tab also displays the following information for each Device Station attached to the amplifier:

Port Number Port Type Account ID

Shows the port number of the appliance.
Shows the station type to which the port connects.
Shows the SIP account (IP address) associated with the device preceded by the extension of the device associated with this port.

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Local Port Username

Shows the port used for SIP.
Shows the username or extension for the station associated with the port.

Standalone Operation Configuration Settings
Configuring this device consists of specifying one or more of the following:
· The SIP server addresses, ports, and SIP extensions at which to register for incoming SIP calls.
· The input multicast (Receive) addresses (and ports) from which the device will receive encoded signals, which will then be converted to analog and played to both line and speaker outputs.
To receive networked audio, configure one or more Multicast Addresses (Receive) entries with the multicast addresses, ports, and codecs from which to receive the encoded streams. Specify the cut level for the signal sent to the output channel, which plays to both the line and speaker outputs.

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Figure 6. Appliance Configuration Settings (Standalone enabled)
The following table describes the Configuration Settings tab settings when Standalone Operation is enabled for this device:
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Table 6. Configuration Settings (Standalone enabled)

Device Type Device Name Web Username

Displays the type of this device. Provides a name for this device. Specifies a web username for this appliance.

Web Password

Specifies a web password for logging into the appliance.

Web Confirm Password Reenter the password used to log into the appliance.

Time Zone Output Power (Watts)a

Specifies the time zone in which the device resides. Specifies the output power for the amplifier in Watts. Valid values are: 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.

Enable SIP Calls
SIP Server Addressa SIP Network Porta SIP Codecsa SIP Extensiona

Enables this device to receive one-way SIP calls, wherein only the caller can be heard (such as announcements). If enabled, a number of SIP-related configuration settings are displayed.
Specifies the IP address of the SIP Registration Server with which the device will register.
Specifies the IP port on which to communicate with the SIP Registration Server (typically 5060).
Displays a read-only list of codecs allowed on SIP sessions.
Specifies the SIP extension for this device.
The extension, along with the IP address, is used to specify the URI used to place a SIP call to this extension:

SIP Usernamea SIP Passworda Cut Levela

sip:@
Specifies the SIP user name used to register with the SIP server.
Specifies the SIP registration password used to register with the SIP server.
Cut level for intercom calls.

This can be a value from -42 to 0 dB.

a. Available only when Enable SIP Calls has a value of Yes.

The following parameters appear for each Multicast Address configured for this device.

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Multicast IP Address Multicast Port Number Codec
Channels

Specifies the multicast IP address on which to receive audio streams.
Specifies the multicast port on which to receive audio streams.
Specifies the codec to be used when decoding audio. Select one of the following values:
· G711 u-law
· Intercom call quality
· A narrowband audio codec that provides toll-quality audio at 64 kbps. The u-law version is primarily used in North America and Japan.
· G711 a-law
· Intercom call quality
· A narrowband audio codec that provides toll-quality audio at 64 kbps. The a-law version is primarily used in most countries outside of North America and Japan.
· G722
· Tone and paging quality
· A wideband audio codec operating at 48, 56, and 64 kbps.
· OPUS
· Music quality
· An audio codec format designed for speech and general audio, supporting low latency, constant and variable bitrate encoding (6 to 510 kbps), and five sampling rates (from 8 to 48 kHz).
Channel(s) on which the audio streams will be output. Fine tuning of levels per output channel can be adjusted using DSP settings.

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Cut Level (dB) Description

Specifies the cut level for the audio stream. This can be a value from -70 to 0 dB. The default value is -20 dB.
Note: To modify, click on the value, adjust the slider on the popup using the cursor keys or mouse, and click the check box button.
Tip: To fine tune the cut level per channel, adjust the gain settings on the DSP Router.
User-specified description of this multicast address. This setting can contain a maximum of 30 characters and should not contain any of the following: []{}<>,|:

Note: A maximum of 24 multicast entries is supported.

Multicast Addresses should be ordered by priority, highest priority first. If multiple streams are active on the same channel simultaneously, the one with the highest priority will be played. Set the Sorting switch to Enabled and drag entries using the 4-way arrow symbols to drag entries up and down to rearrange the priorities.

Accessing Log Files
A log file records events and messages that occur when software runs, to be used when troubleshooting the appliance. From the appliance’s web-based UI, log files can be viewed directly or exported via download to your PC, Mac, or Android device, where they can be copied to removable media or attached to an email for technical support.
To view a log file:
1 On the appliance Web UI’s main page, select Logs.
2 From the drop-down menu, select the log that you want to view. Multiple versions of the same log, and zipped copies of the log, may be available.
3 To export the file, select Export. A link to a .txt file appears in the browser’s lower left corner.

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Figure 7. Logs
Available logs are described in the following table. If a log file is empty, however, it will not appear in the drop-down list of available logs.
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Log ampws.log
auth.log
btmp daemon.log
debug dpkg.log
faillog kern.log
lastlog messages php5-fpm.log syslog
user.log

Table 7. Logs
Description
Contains information about protection status and logs protection events with temperature information at the time of event.
Contains system authorization information, including user logins and authentication methods that were used.
Contains information about failed login attempts.
Contains information logged by the various background daemons that run on the system.
Contains errors and debug information.
Contains information that is logged when a package is installed or removed using dpkg command.
Contains user failed login attempts.
Contains information logged by the kernel and recent login information for all users.
Contains information on the last login of each user.
Contains messages generated by Nyquist.
Contains errors generated by the PHP script.
Contains list of errors that occur when the server is running and server start and stop records
Contains information about all user level logs.

Setting DSP Parameters
When you select DSP from the appliances web UI, the DSP page appears.
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Figure 8. DSP Page with Channel Drop-Down Menu
From this page, you can adjust settings in the DSP. The appliance uses traditional processors (for example, Compressor, Limiter) for audio signals in the digital domain. The DSP page shows Mute and Level selections for the input channel and allows you to adjust the channel input level. Selecting the Menu button displays other parameters. DSP parameters and the Mute and Level buttons are described in the following table:
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Save Settings to Server
Mute DSP Features button Channel Fader Signal LED IN VU meter OUT VU meter

Table 8. DSP Page
Backs up the DSP settings to the server. If this device is later replaced or reset to factory defaults, these DSP settings can be restored when the new device is “swapped” for the old on the Nyquist server.
Note: This button appears on each DSP feature page.
Silences the audio.
Presents a menu of DSP features that can be applied to the corresponding channel.
Adjusts the channel volume level in 1-dB increments.
Illuminates when a signal is present.
Indicates the strength of the network input signal.
Indicates the strength of the channel output signal for both Line Output and Speaker Output.

The DSP features that can be applied to a channel, accessible through the DSP Features menu, are described in the following table.

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Compressor High/Low Pass
Limiter Outputs Parametric EQ Settings Signal Present Reset button

Table 9. DSP Features
Lessens the dynamic range between the loudest and quietest parts of an audio signal.
Sets the band of frequencies that will pass through the high pass and low pass filters and selects the type of filter that is used.
Prevents a signal from exceeding an adjustable maximum level.
Allows you to enable speaker or line outputs and to adjust the volume level for each output.
Uses a center/primary frequency to allow tailoring of the frequency content of an audio signal.
Allows you to provide names and colors for the input channel.
Illuminates green when audio is present in the channel input.
Present on almost all DSP screens other than the main mixer, this button will reset the DSP settings to the displayed feature’s default setting.

Setting the Channel Level
The channel level control is a channel fader, which is adjusted in 1-dB increments and controls the output level for the channel. The channel levels can range from -60 to +12 dB. If you place the mouse over the fader, the numerical value of the level appears.

Adjusting Volume Levels
The channel fader control can be used to adjust the channel’s output level in 1-dB increments between -60 and +12 dB. The overall adjusted output level of the channel signal can be viewed on the OUT VU meter, marked in 2-dB increments between -60 and 0 dB.
Tip: For best results, adjust input signal levels until you have a strong signal (i.e., within the green and yellow areas on the meter), then adjust the final output levels using the DSP Outputs controls.

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To adjust the channel volume level:
1 On the appliance Web UI’s main page, select DSP. 2 Use the channel’s fader to adjust the volume level.
Knob Adjustments
Many DSP controls use knobs to adjust one or more settings. The value of a knob can be adjusted in one of two ways: 1 Click the knob control, hold the mouse button down, and drag the mouse up or down
to increase or decrease the value. 2 Double-click the knob, type a value into the resulting popup, and click the Save but-
ton.
Signal Indicators
Each input channel has signal indicators and two vertical volume unit (VU) meters, labeled “IN” and “OUT”. The green input signal LED(s) automatically illuminates when a signal is being received. The red Clip LED automatically illuminates when the signal is clipping (i.e., exceeding a predefined threshold). Clipping can result in distortion and, for output signals, can even damage speakers. Note that the specific level and duration that a signal must reach in order to trigger the input signal LED can be configured via the Signal Present settings. The “IN” VU meter indicates the strength of the channel’s input signal (after gain adjustments), while the “OUT” VU meter indicates the strength of the channel’s output signal. The VU meter not only illuminates green, yellow, or red (depending on the signal level), but also has a scale ranging from -60 to 0 dB to indicate the actual signal level.
Muting a Channel
You can mute a channel to cut off an audio signal and stop the input signal from being sent to the output channel. Note the input signal will still be visible on the IN meter, but the OUT meter will show that nothing is being forwarded to the output channel. To mute a channel:
1 On the appliance Web UI’s main page, select DSP. 2 Click the Mute button for the channel that you want to silence.
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The Mute button will illuminate red. You can click the Mute button again to unmute the channel.
Adjusting Compression Settings
A compressor reduces the dynamic range of a signal. This effect is perceived as quieting loud sounds and boosting quiet sounds.
Figure 9. Compressor Settings
To adjust the compressor settings for a channel: 1 On the appliance Web UI’s main page, select DSP. 2 Select the Menu button for the channel. 3 From the drop-down menu, select Compressor. 4 Make desired adjustments using the controls described in Table 10, “Compressor Set-
tings,” on page 25. Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner. 5 Select Enable to apply the settings to the selected channel.
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Enable Threshold Attack
Hold Decay
Knee

Table 10. Compressor Settings
Enables or disables the compressor DSP effect for this channel.
Sets the threshold level, which is the point where the signal activates the compressor circuit.
The range is -135 to +21 dB.
Sets how quickly or slowly compression will be applied to the signal once the audio signal goes above the threshold level. It specifies the length of time over which the compression ratio will gradually increase from no compression to full compression.
The range is 1 to 500 ms.
Sets how long compression will be applied after the signal has fallen below the threshold.
The range is 1 to 500 ms.
Sets how quickly or slowly compression will be removed from the signal after the signal has dropped below the threshold and the Hold interval has expired. It specifies the length of time over which the compression ratio will gradually decrease from full compression to no compression.
The range is 0 to 2000 ms.
Sets how far below the threshold compression will begin to be gradually applied to the signal. A very low value, known as a hard knee, immediately applies full compression once the threshold is reached. A high value, known as a soft knee, will gradually start applying compression before the signal reaches the threshold, not reaching the full effect until the threshold is reached, thereby “rounding off” the compression effect. Increasing the knee level decreases the obvious transition from the uncompressed to the compressed sound.
The range is 1 to 100 dB.

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Ratio
Input meter Output meter Comp LED

Table 10. Compressor Settings
Sets the compression ratio to be applied to the signal. For example, if the ratio is set for 6 (6:1), the input signal must increase by 6 dB for the output level to increase by 1 dB.
The range is 1 to 100.
Shows the strength of the input signal.
Shows the strength of the output signal, providing a visual indicator of the effect of the compressor on the output signal.
Illuminates when compression is being applied to the signal.

Setting High Pass/Low Pass Parameters
High-pass filters allow signals that are higher than the specified frequency and attenuate signals that are lower. Low-pass filters allow signals that are lower than the specified frequency and attenuate signals that are higher. When combined, they are known as a bandpass filter. Band-pass filters can be used to tailor the frequency response of a microphone exclusively for vocals, which can be very useful in a noisy environment to filter out the higher and lower frequencies that could mask the human vocal range during announcements.
You can specify the range of frequencies that will pass through the high-pass and lowpass filters and select the type of filter that is used through the channel’s High/Low Pass drop-down menu option.

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Figure 10. High/Low Pass Parameters
To adjust the high/low pass parameters for a channel: 1 On the appliance Web UI’s main page, select DSP. 2 Select the Menu button for the channel. 3 From the drop-down menu, select High/Low Pass.

Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner. 4 Set the parameters described in the following table:

Table 11. High/Low Pass Parameters High-Pass (Low Cut)

This feature helps eliminate low-frequency noise (signals of 100 Hz and below, such as background rumble from ventilation systems, etc.) and is used primarily with microphone-level input. It is particularly effective when handheld microphones are used.

Enable

Enables or disables the High-Pass filter.

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Table 11. High/Low Pass Parameters (Continued)

Frequency

Set the cutoff frequency. You can adjust the frequency by moving the knob (click and move up or down) or by double-clicking the knob and typing the frequency. When typing the frequency, only numeric values from 20 Hz to 20,000 Hz can be entered.

The high-pass filter attenuates content below this frequency and lets frequencies above this cutoff frequency pass through the filter.

Type

Available filter types are:

Low-Pass (High Cut)

· Linkwitz-Riley (12, 24, 36, and 48 dB per octave)
· Butterworth (6, 12, 18, 24, 30, 36, 42, and 48 dB per octave)
· Bessel (12, 18, and 24 dB per octave)
Note: The term “dB per octave” describes how steeply frequencies below the selected cutoff frequency are attenuated. For example, if the cutoff frequency is 100 Hz and the filter type specifies 12 dB per octave, a 50-Hz signal (i.e., one octave lower) will be attenuated by 12 dB and a 25-Hz signal (i.e., two octaves lower) will be attenuated by an additional 12 dB.

This feature helps eliminate high-frequency noise (signals of 8000 Hz and above) such as background hiss and sibilance (excessive “S” in vocals, etc.) and is used primarily with microphone-level input. It is particularly effective when handheld microphones are used.

Enable

Enables or disables the Low-Pass filter.

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Frequency Type

Table 11. High/Low Pass Parameters (Continued)
Set the cutoff frequency. You can adjust the frequencies by moving the knob (click and move up or down) or by double-clicking the knob and typing the frequency. When typing the frequency, only numeric values from 20 Hz to 20,000 Hz can be entered.
The low-pass filter attenuates content above this frequency and lets frequencies below this cutoff frequency pass through the filter.
Available filter types are:
· Linkwitz-Riley (12, 24, 36, and 48 dB per octave)
· Butterworth (6, 12, 18, 24, 30, 36, 42, and 48 dB per octave)
· Bessel (12, 18, and 24 dB per octave)
Note: The term “dB per octave” describes how steeply frequencies above the selected cutoff frequency are attenuated. For example, if the cutoff frequency is 8,000 Hz and the filter type specifies 12 dB per octave, a 16,000-Hz signal (i.e., one octave higher) will be attenuated by 12 dB and a 32,000-Hz signal (i.e., two octaves higher) will be attenuated by an additional 12 dB.

Adjusting the Limiter
A limiter is a compressor with a high slope (i.e., attack) that is used to prevent a signal from exceeding a set decibel level. Limiters are used as safeguards against signal clipping. Limiter parameters are set per channel.

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Figure 11. Limiter Settings
To adjust the limiter settings for a channel: 1 On the appliance Web UI’s main page, select DSP. 2 Select the Menu button for the channel or select the Menu button for the Output. 3 From the drop-down menu, select Limiter. Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner. 4 Adjust the following settings as needed:
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Threshold
Decay
RMSTC (Root Mean Square Time Constant)

Table 12. Limiter Settings
Sets the signal level at which the limiter is triggered. Any signal exceeding this threshold will be compressed to this level.
The range is -24 to +24 dB.
Sets the rate for turn off of the limiter after the signal is below the threshold.
Decay range is 5 to 2300 milliseconds.
Sets how fast the limiter reacts to a signal that has exceeded the threshold.
RMSTC range is 50 to 10000 dB/sec.

Adjusting Outputs
Selecting Outputs allows you to enable and adjust the volume levels for speaker and line outputs.

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Figure 12. Outputs
To adjust outputs for speaker or line: 1 On the appliance Web UI’s main page, select DSP. 2 Select the Menu button. 3 From the drop-down menu, select Outputs. 4 To enable outputs for a speaker or line, select Enable for the corresponding output. 5 Make desired Volume adjustments by adjusting the knob. Volume levels range from 0
to 15 dB for the Speaker Output and -15 to 15 dB for the Line Output.
Adjusting Parametric Equalizer Settings
A parametric equalizer is a multi-band variable equalizer that allows control of frequency amplitude (boost/cut), center frequency, and frequency bandwidth, or Q.
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Figure 13. Parametric Equalizer Settings
The parametric equalizer settings for your device allows you to adjust the Q and gain for seven separate frequencies, which then become plot points on the screen’s graph. To adjust the parametric equalizer settings for a channel:
1 On the appliance Web UI’s main page, select DSP. 2 Select the Menu button for the channel. 3 From the drop-down menu, select Parametric EQ.
Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner.
4 Adjust frequencies as desired, ensuring the Enable LEDs are green for each selected frequency. You can adjust the frequencies by moving the Freq knob or by doubleclicking the knob and typing the frequency. When typing the frequency, only numeric values from 20 to 20,000 can be entered.
5 Make desired Q adjustments by adjusting knob (or double-clicking and typing the desired adjustment). Q can be from 0.1 to 20 and sets how wide to either side of the selected frequency the adjacent frequencies are affected. Q is the Quality or Quality Factor, which refers to the bandwidth of one band of a parametric equalizer. Q is calculated by dividing the center frequency in Hz by the width of the boost or cut zone, +3 dB or -3 dB above or below 0 dB.
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6 For each frequency, use the Gain knob or double-click the knob and type the gain to either boost (turn up) or cut (turn down). Gain knobs can be moved between +12 or -12 dB. By default, each knob is set at 0 dB, which means that no frequencies are being boosted or cut.
7 Select Save Settings to Server.
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Settings

You can set select a name and a color for the input channel.
Figure 14. Settings Parameters
To adjust the settings for the channel: 1 On the appliance Web UI’s main page, select DSP. 2 Select the Menu button for the channel. 3 From the drop-down menu, select Settings. 4 Type the name that you want to display for the channel. 5 Select a color that will be used to highlight the channel. Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner. 6 Select Save.
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Signal Present
You can configure the threshold level that a signal must reach before the signal LED is lit, as well as how long the LED will remain lit. You can configure this for each channel.
Figure 15. Signal Present Parameters
To adjust the Signal Present settings for a channel: 1 On the appliance Web UI’s main page, select DSP. 2 Select the Menu button for the channel. 3 From the drop-down menu, select Signal Present. Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner.
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4 Adjust the following settings as needed.

Threshold Hold

Table 13. Signal Present Parameters
Sets the minimum level the signal must reach before the signal LED is illuminated.
Threshold range is -144 to +24 dB.
Sets the minimum number of milliseconds that the signal LED will remain illuminated.
Hold range is 2 to 200 milliseconds.

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Appendix A: Bogen Digital Certification Authority
Installing the Bogen Digital Certification Authority
When your client (e.g., a web browser) connects to the Bogen device’s web application, the device’s digital certificate is sent to the client to authenticate the identity of the device’s web application. The client uses the Bogen Certification Authority (CA) certificate to authenticate the device’s digital certificate, which verifies that the client is connecting to a valid server. If you do not install the Bogen CA certificate, the browser will display a warning that it was unable to authenticate the server, displaying a red Not secure warning immediately to the left of the browser’s address bar when you attempt to access the Bogen device.
Installing Certification Authority on Windows System
To download and install the Certification Authority on a Windows device: 1 From your Chrome or Edge browser, type http:///ssl/bogenCA.crt in the address bar,
where is the Nyquist device’s IP address or DNS name (for example, http:// 192.168.1.0/ssl/bogenCA.crt). 2 Select the downloaded file and select Open. 3 Select Open when prompted with “Do you want to open this file?” 4 Select the Install Certificate… button. The Certificate Import Wizard starts. 5 Select Current User, and then select Next.
Note: To allow all users on this Windows client to access the Nyquist device, select Local Machine instead of Current User. You may be prompted for administrator credentials.
6 Select “Place all certificates in the following store”, then select Browse. 7 Select Trusted Root Certification Authorities, and then select OK. 8 Select Next. 9 Select Finish. 10 Restart the browser and log in to the device’s web application.
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You can also download and install the Certification Authority using a PowerShell command prompt or script, which involves fewer steps. To download the certificate to a CRT file, execute the following PowerShell command, replacing with the IP address or DNS name of the Nyquist device:
Invoke-WebRequest -Uri http:///ssl/bogenCA.crt -OutFile $env:TEMPbogenCA.crt
If you wish to validate the certificate before importing it, execute the following command after retrieving the CRT file:
(New-Object -TypeName Security.Cryptography.X509Certificates.X509Certificate2 -ArgumentList “$env:tempbogenCA.crt”).GetCertHashString()
The output will be the hash value (i.e., thumbprint) of the downloaded certificate, which should match the following (as of the current release):
0A8248F69D970F8DD855D0E0592972DA64B1A845
To install the certificate for the current user, execute the following command:
Import-Certificate -CertStoreLocation cert:CurrentUserRoot -FilePath $env:TEMPbogenCA.crt
That command installs the CA certificate into the CurrentUser certificate store, which only applies to the current user. To install the certificate for all users on this machine, which requires administrator privileges to execute, execute the following command:
Import-Certificate -CertStoreLocation cert:LocalMachineRoot -FilePath $env:TEMPbogenCA.crt
Note: These commands can also be executed remotely using PowerShell Remoting, which may be helpful if the certificate needs to be installed on many client machines.
Installing Certification Authority on Mac System
To download and install the Certification Authority on a Mac:
1 From your Chrome or Edge browser, type http:///ssl/bogenCA.crt in the address bar, where is the Nyquist system device’s IP address or DNS name (for example, http:// 192.168.1.0/ssl/bogenCA.crt).
2 Save the downloaded bogenCA.crt file to the desktop. 3 Double-click the certificate file on the desktop.
The Keychain Access App opens. 4 Double-click the certificate to reveal the trust settings. 5 Change the top trust setting to Always Trust. 6 Close the Trust Setting window and enter the computer administrative password to save. 7 Restart the browser and log in to the Nyquist web application.
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Installing Certification Authority on an Android Device
Note: The Android device WiFi must be connected to the same network as the Nyquist Server.
To download and install the Certification Authority on an Android device: 1 From your Chrome or Edge browser, type http:///ssl/bogenCA.crt in the address bar,
where is the Nyquist device’s IP address or DNS name (for example, http://192.168.1.0/ssl/bogenCA.crt). 2 If prompted, verify your identity (e.g., enter your PIN or fingerprint). 3 Type a certificate name (e.g., “Bogen CA”), specify “VPN and apps” under “Used for”, and select OK to install the certificate.
Installing Certification Authority on an iOS Device
Note: The iOS device WiFi must be connected to the same network as the Nyquist Server.
To download and install the Certification Authority on an iPhone Operating System (iOS) device: 1 From your Safari browser, type http:///ssl/bogenCA.crt in the address bar, where