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Overview 

 

 

 

The Contemporary Research 232-FMA is a versatile RS-232 controlled FM tuner featuring stereo 
audio, 10-preset memory, front-panel operation and feedback, and intelligent control. Fully 
programmable, the unit can restore all settings on power-up from non-volatile memory.  
 
The front-panel buttons and LED display can be used for general operation and to program basic 
features for tuning, RS-232 baud rate and local control. Full setup, control, and feedback is provided 
by RS-232. Up to three FM, TV tuners, and AV6x4 Routers can be controlled from a single RS-232 
port. In addition, remote preset up and down operation can be accessed through contact closure 
inputs.

 

 

 

 

Tunes FM stereo broadcasts with local/DX modes, auto stereo/mono operation 

 

Interacts with PCs and control systems via RS-232, using simple ASCII-format commands and 
feedback, up to 3 tuners can be linked to a single RS-232 control port 

 

Stores up to 10 presets in onboard memory, unlimited presets via external control system 

 

Accesses presets via front-panel control, RS-232, and contact closures 

 

Provides front-panel control for A/V Mute, Seek up/down, and Preset up/down; with LED 
feedback for Mute, current frequency and programming mode 

 

Restores all operation status after loss of power from data stored in non-volatile memory 

 

Mutes audio with front-panel LED indicator 

 

Enables and disables front-panel operation via front-panel and RS-232 commands 

 

Mounts in 19" rack with optional RK1 or RK2 kit for dual side-by-side installation 

 

 

 

 

 

Contemporary Research

 

 

 

 

 

 

     

232-FMA FM Stereo Tuner

 

Summary of Contents for 232-FMA

Page 1: ...Davenport Road Suite 113 Dallas TX 75252 Phone 972 931 2728 Toll Free 888 972 2728 Fax 972 931 2765 E Mail Sales crwww com Website www crwww com Product Manual 232 FMA Stereo FM Tuner Rev 1 3 August 1...

Page 2: ...at 0dB 5 Mode 9 Treble setting fixed at 0dB 6 Front Panel Programming Quick Reference 6 RS 232 Control Protocol 7 Overview 7 General protocol specifications 7 Command String Structure 7 General RS 23...

Page 3: ...FM stereo broadcasts with local DX modes auto stereo mono operation Interacts with PCs and control systems via RS 232 using simple ASCII format commands and feedback up to 3 tuners can be linked to a...

Page 4: ...o parity 1 stop bit All standard ASCII keyboard character strings available from any terminal program 2 momentary closure inputs close to ground pin 5 to select stored presets Preset Up Pin 4 Preset D...

Page 5: ...igher baud rates are recommended for quicker response time Mode 2 Unit Address Select Selects unit address used in RS 232 remote control protocol Factory default is unit address 1 and should only be 2...

Page 6: ...nit Number 2 1 one 2 two 3 three Not Used 3 0 Panel Lockout 4 0 none 1 preset up dn 2 seek up dn 3 preset seek up dn 4 mute A V 5 preset up dn Mute A V 6 seek up dn Mute A V 7 all Power up Volume 5 0...

Page 7: ...a unique unit code Front Panel Mode 2 Communications parameters Front Panel Mode 1 are 300 to 9600 baud 8 data bits No parity and 1 stop bit Factory default is 9600 baud Unit 1 All settings are saved...

Page 8: ...s VX Volume Mute off Restores audio volume to previous level VV Stop volume ramp Stops volume ramping VT Toggle Volume Mute Alternates audio mute on and off VM Volume Mute on Example VM Turns off audi...

Page 9: ...catenated as single strings up to 120 ASCII characters long Example XXTC 89 5 Selects Mute A V off station 89 5 Example S0 0S4 0 Selects odd frequency mode no front panel lockout Mute A V Off command...

Page 10: ...characters similar to those used for the same functions in command strings An ASCII carriage return and line feed follow each response string Frequency Source Status Response String Audio Status Resp...

Page 11: ...Remember that you will need to use the Unit address in your programming when you control more than one tuner from the same control port You can also daisy chain one or two tuners with an AV6x4 A V Rou...

Page 12: ...four 4 supplied 8 32 by black countersunk screws RK2 Side by Side Rack Kit 1 Remove top cover of the first unit by removing the ten 10 black screws 2 Attach cover of first unit to the side of the sec...

Page 13: ...system refrain from touching such power lines or circuits as contact with them might be fatal 6 Overloading Do not overload wall outlets and extension cords as this can result in a risk of fire or ele...

Page 14: ...amages are sought or a claim is made under this warranty or as a tort claim including negligence and strict product liability a contract claim or any other claim This limitation of liability cannot be...

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