Pira cz P275R FM Monitoring Receiver with Two Relays User Guide

Pira cz P275R FM Monitoring Receiver with Two Relays

P275R FM Monitoring Receiver with Two Relays

User Guide

Web: http://www.pira.cz

E-mail: mail@pira.cz

Contents

1. Introduction
2. Hardware Description
   • Connectors, Control Elements, and Status Indicators
3. Installation
4. Annexes

Introduction

Using this guide

This guide provides information on the P275R FM monitoring receiver and instructions on how to install and use the device. It is recommended that you read this guide in its entirety and familiarize yourself with the controls before attempting to use the device. If you have any questions or comments regarding this guide, please contact us via email.

Description of the equipment

The P275R FM monitoring receiver is a compact device that extends the original P275’s capabilities with two independent general-purpose relays, driven by alarm outputs. The relay function is user configurable. The device provides four alarm outputs with LED status indications for each output. The relay pins and the Alarm Outputs are accessible via terminal blocks. The device is equipped with a USB B-type socket and an aluminum case that provides excellent shielding in strong RF signal environments. The device is fully compatible with the P275 FM Analyzer, and the FM Scope control software for Windows is used for setup and provides access to all measurements and values.

Other documents

This document is not a complete reference manual. For more information, please visit the website for the P275 FM Broadcast Analyzer User Manual, FM Scope User Guide, and Support section at http://www.pira.cz

Technical parameters

IMPORTANT!!! The device power supply voltage is 5 V. Exceeding that voltage will result in permanent damage to the device! Always check the power supply voltage.

CAUTION!!! Never exceed the relay maximum switching voltage: 24 V. Exceeding that voltage may result in permanent damage or electric shock!

Hardware description

Connectors, control elements and status indicators

The device features connectors for power supply, RF input, and terminal blocks for relay pins and alarm outputs. It also has control elements and LED status indicators for each of the four alarm outputs.

The P275R FM monitoring receiver can be installed by following these steps:

1. Ensure that the power supply voltage is 5 V DC and that the relay maximum switching voltage is not exceeded.
2. Connect the power supply, RF input, and terminal blocks for relay pins and alarm outputs.
3. Use the FM Scope control software for Windows to set up the device and access all measurements and values.

Introduction

Using this guide

This guide covers the P275R FM monitoring receiver. It provides the information needed to install and using the device. Please read this entire guide and familiarize yourself with the controls before attempting to use this device. If you have any questions or comments regarding this document, please contact us via email. We welcome your feedback.

This compact device extends the original P275’s capabilities with two independent general purpose relays, driven by alarm outputs. The relay function is user configurable. Total four alarm outputs are provided, with LED status indication for each output. The relay pins and the Alarm Outputs are accessible via terminal blocks. The device is equipped with USB B-type socket. The aluminum case provides excellent shielding in strong RF signal environment. The device is fully compatible with the P275 FM Analyzer. The FM Scope control software for Windows is used for setup and provides access to all measurements and values.

Other documents

This document is not a complete reference manual. Please visit the website for more information:

• P275 FM Broadcast Analyzer User Manual
• FM Scope User Guide
• Support section at http://www.pira.cz

Technical parameters

IMPORTANT:  The device power supply voltage is 5 V. Exceeding that voltage will result in permanent damage to the device! Always check the power supply voltage.
CAUTION: Never exceed the relay maximum switching voltage: 24 V. Exceeding that voltage may result in permanent damage or electric shock.

Hardware description

Connectors, control elements and status indicators

All the elements can be found on the side panels:

ohms for RF. Max. RF power is 20 mW.

Max. MPX signal swing is 8.0 Vpp.

USB| Allows connection of external 5V power supply or connection to a PC. Serial communication speed of this port is currently fixed to 115200 bps.
PWR| Power LED. It signalises that the device is turned on.
EXT 5V| Power supply connector.

Recommended power supply adapter: 5 V, min. 1 A, connector 1.3/3.5mm, central is Ë.

IMPORTANT! Exceeding the voltage will result in permanent damage to the device!

Headphones| Stereo 3.5mm JACK connector for optional connection of headphones.
RS-232| Serial RS-232 connector female type. Communication speed of this port can be 19200 or 115200 bps. The device currently does not support concurrent communication on the RS-232 and USB ports.

Depending on mechanical characteristics of the connectors, the RS-232, EXT 5V and Headphones may not be usable at the same time.

Alarm Outputs| The device provides four independent digital outputs, marked 1 to 4. Outputs 1 and 2 also drive built-in relays. Status of each output is indicated by LED. Each alarm output can be used either as general purpose output or various conditions may be assigned, like measured value out of range, RDS TA status etc.

Wires can be connected to the alarm outputs via pluggable terminal blocks. This accessory is included.

For more information, please follow the document ‘P275 FM Broadcast Analyzer User Manual’ (available online).

Hardware installation

Power supply, antenna input
Please follow the original P275 User Manual.

Alarm Outputs
The device provides four independent digital outputs, marked 1 to 4. Alarm outputs 1 and 2 also drive built-in relays. Status of each output is indicated by LED.
Following block schematic summarizes the Alarm Outputs connection. The relays are drawn in Off position:

Each alarm output can be used either as a general purpose output or various conditions may be assigned, like measured value out of range, RDS TA status etc. Future firmware versions will bring further possibilities and conditions.

• A power supply line (+5V) is available as well, for optional use. The relay pins are ‘floating’ – isolated from the rest of the device’s circuits.
• Wires can be connected to the alarm outputs via pluggable terminal blocks. This accessory is included.
• For more information, please follow the document ‘P275 FM Broadcast Analyzer User Manual’ (available online).

Software installation

First communication with the FM Scope application

• The FM Scope application is free for download at https://www.pira.cz.
• In case of USB connection, install the USB drivers first.
• In the Connection field, select ‘Serial RS232/USB’ connection type. Select the COM port assigned to the device by the system. Select 115200 bps communication speed. Finally click on Connect.
• The application status bar at the bottom indicates the connection status. Verify the function by selecting a local station and clicking on Tune.
• In Options – Preferences – General – Application Settings select the option Online update of deviation and signal.
• Finally tune the frequency of interest and if necessary, adjust the antenna position for getting full (5/5) signal quality.

Alarm Outputs setup

• For basic alarm use, select Options – Alarm Outputs.
• For using some alarm output as general purpose output or RDS TA output, go to Text console card and type appropriate command in the
• bottom line. Follow the original P275 User Manual for details.

Examples:

driven low
send(ARK:GH*X)| Alarm 3 output is used as general purpose output and it’s now driven high

Headphones audio output setup

The analogue audio output may be useful in some specific applications. The audio output options are available in the menu: Options – DIP Switches and Analogue I/O. Here you can adjust volume, pre-emphasis and some more parameters.

Note: Requires firmware version 2.2b r6 or later and FM Scope version 1.6.1 or later. The headphones audio output is not suitable for audio
applications like rebroadcasting. Higher volume results in better S/N.

Saving current configuration
Once all settings are done, save the configuration to the device’s non- volatile (permanent) memory:
In toolbar, click on the button
The device is now ready for stand-alone operation.

ANNEXES

Connection diagram

Part list

Device differences

Features which are not listed are common to both device variants.

Specification of pluggable terminal blocks (included)

• Web: http://www.pira.cz
• E-mail: mail@pira.cz

References

• Pira.cz - Special FM Broadcast Equipment
• Pira.cz - Special FM Broadcast Equipment

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