Digital Alert Systems 3000R-161 CATV Switching and Control Instruction Manual
- July 25, 2024
- Digital Alert Systems
Table of Contents
Digital Alert Systems 3000R-161 CATV Switching and Control
Product Information
Specifications:
- Model: Series 3000 Model R-165A
- RF Isolation: > 60 dB @ 950 MHz
- Attenuation: +/- 1 dB 0 to 950 MHz
- Power Requirement: 100-240VAC +/- 2%, 50/60Hz supplies +12V DC
Product Usage Instructions
General Instructions:
Ensure the device is connected to a power source within the specified range (100-240VAC, 50/60Hz). Place the device in a well-ventilated area to prevent overheating.
Installation:
Connect the device to the appropriate CATV source using the provided cables. Ensure a secure connection to prevent signal loss.
Operation:
Use the control panel on the device to switch between different CATV channels. Refer to the user manual for specific instructions on channel selection and operation.
Maintenance:
Regularly check for dust buildup and clean the device using a soft, dry cloth. Avoid using harsh chemicals that may damage the device.
FAQ
- Q: What should I do if the device is not switching channels?
- A: Check the cable connections and ensure they are secure. Restart the device and try switching channels again.
- Q: Is it normal for the device to feel warm during operation?
- A: Yes, it is normal for electronic devices to generate some heat during operation. Ensure proper ventilation around the device to prevent overheating.
Specifications
- RF Isolation
-
60 dB @ 950 MHz.
-
- Attenuation
- +/- 1 dB 0 to 950 MHz
- See Attached Graphs.
- Power Requirement
- 100-240VAC +/- 2%, 50/60Hz
- supplies +12V DC @ <300mA
- (UL approved wall supply included.)
- Control Inputs
- Contact Closure to GND or logic input
- Absolute Maximum Input Voltage +12 VDC
- Logical High Input Voltage +7 VDC
- Logical Low Input Voltage +2 VDC
- Max Sink Capability
- <2.4 mA
- Aux Relays Contact Rating:
- 30 VDC max; 1A max
- Physical
- 1.75” H X 19” W X 7” D, 1 RU
- Weight 5 lbs.
- Accessories Included with Instrument
- Power Supply
- Mating connectors
- Mounting Kit
General
Mounting:
Digital Alert Systems’ Model R165A mounts into a 1RU standard 19 inch EIA equipment rack. Slide the unit into the rack frame and secure it, using the 3000R/22M mounting hardware supplied with the unit.
Connections:
-
The Video (or IF/RF) switches are mechanical relays. Connections to them are made through 75Ω F connectors on the rear of the unit. Connect the default signal to the NC (normally closed or primary) connector. Connect the alternate signal to the NO (normally open or secondary) connector. Connect the modulator, or other destination, to the COM (common or output) connector. Video connectors may also be used to switch high frequency signals, such as IF or RF. Useable frequencies are shown on the frequency response charts included. Both inputs must be the same type of signal. Some relay sets can be used for baseband video and some for high frequency, since all switch modules are isolated.
-
If the signals being switched are baseband video, with audio following, connect the audio signals to screw terminals of the same switch group, ensuring that the left and right channels for the default audio are connected to the L NC + and -, and the R NC + and -, and the signals for the alternate signal are attached to the L NO
+ and – and the R NO + and – connectors. The L OUT + and – and the R OUT
+ and – are routed to the modulator or other destination of the audio signals. -
To actuate a relay section with a contact closure, connect the contacts between each relay control input screw terminals (SW1–SW4) and ground (GND) screw terminal. Refer to the rear panel connections illustration and the applications section of this manual.
-
Connect the +12 VDC lead (white) from the power supply to the +12v terminal on the rear panel, and the black lead to the GND terminal. Plug the power supply into a 90 – 264VAC power outlet, and the unit is ready to function.
-
If wiring balanced stereo audio (or balanced mono audio), and a tie point for the ground wires is required, use the AUX2-COM and AUX1-COM terminals. These points are floating if no connections are made to AUX2-NO and AUX2-NC and the AUX1-NC points.
Operation
When the contact closure for a Relay Unit is closed, the output (Com) connection is switched from the default input (NC) to the alternate input (NO).
Application
Digital Alert Systems Model R165A is a multi-contact relay panel capable of switching away from signal A and connecting to signal B. Each R165A has 4 independent relay sections. All sections of the relay are mechanical with no active circuitry involved in the signal path. Each relay in the R165A is internally divided into 2 sections – video and audio. The video section is constructed so that its reference impedance is 75 ohms. The relay is a high quality RF type so that the video section can also be used for switching RF signals up to 950 MHz (see specifications). Note that the non-selected input into the video section is terminated into 75 ohms. The audio section has contacts enough to provide full balanced stereo audio. There are 2 sets of auxiliary contacts for switching additional signals such as SAP or various tally indicators. A basic schematic of one of the four relays is shown in the following graphic.
Activation of any of the 4 relays can be accomplished by external contact closure, open collector transistor or logic signal. In most applications, the R165A is connected to other devices that provide the activation signal.
Control by LAN
The R165A can be easily controlled by anyone on a local network with a web browser. This application requires interfacing the R165A with a network remote control, like Digital Alert Systems model R190A.
Matrix Configuration
The four sections of the R165A can also be wired to provide matrix switching capability from 1 X 3 to 1 X 5. Triggering of each section connects a specific input to the matrix output. Video connections are shown in the following graphic. Audio connections would be made in a similar fashion.
This graph demonstrates the Return Loss of a typical switch input. Red shows the signal through the Bridge with no connection. The yellow shows the signal when the bridge is terminated with a –26 dB Loss load, and the green shows the return loss when the bridge output is connected to the normally Closed switch input with a 75 ohm load on the output.
This graph shows attenuation of the signal from a switch that is ON to the output. [10 db per division, 0 to 1000 MHz]
This graph demonstrates the isolation from a switch that is OFF to the output. [10 db per division, 0 to 1000 MHz]
WARRANTY
Digital Alert Systems, Inc. warrants to the owners, each instrument and sub-
assembly manufactured by them to be free from defects in material and
workmanship for a period of two years after shipment from factory. This
warranty is applicable to the original purchaser only. Liability under this
warranty is limited to service, adjustment or replacement of defective parts
(other than fuses and batteries) on any instrument or sub-assembly returned to
the factory for this purpose, transportation charges prepaid. This warranty
does not apply to instruments or sub-assemblies subjected to abuse, abnormal
operating conditions, or unauthorized repair or modification.
Since Digital Alert Systems, Inc. has no control over conditions of use, no
warranty is made, or implied as to the suitability of our product for the
customer’s intended use.
THE WARRANTY SET FORTH IN THIS ARTICLE IS EXCLUSIVE AND IN LIEU OF ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESS, IMPLIED OR STATUTORY INCLUDING, BUT
NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. Except
for obligations expressly undertaken by Digital Alert Systems, in this
warranty, Owner hereby waives and releases all rights, claims and remedies
with respect to any and all warranties, express, implied or statutory
(including without limitation, the implied warranties of merchantability and
fitness), and including but without being limited to any obligation of Digital
Alert Systems with respect to incidental or consequential damages, or damages
for loss of use. No agreement or understanding varying or extending the
warranty will be binding upon Digital Alert Systems unless in writing signed
by a duly authorized representative of Digital Alert Systems. In the event of
a breach of the foregoing warranty, the liability of Digital Alert Systems
shall be limited to repairing or replacing the non-conforming goods and/or
defective work, and in accordance with the foregoing, Digital Alert Systems
shall not be liable for any other damages, either direct or consequential.
RETURN POLICY TO FACTORY
Materials returned to Digital Alert Systems must have a Return Material Authorization number. To obtain a RMA number, contact our A/V Switching & Control Customer Service at 585-765-2254 or fax 585-765-9330. Customers have 30 days to determine that the product ordered fills their need and performs as described in Monroe’s literature. Units returned for approved repair or credit, must be in the original packaging including all parts and paperwork plus be in very good physical condition. If not, the customer is billed the cost to refurbish the unit and for missing accessories and merchandise. No products may be returned for exchange or credit after 12 months of the shipment date. Monroe reserves theright to repair or replace units under warranty.