Omnicron Electronics - Professional Voice Logging Recorders and Accessories - since 1975 
 Professional Voice Logging Recorders  and  Accessories


Digital Recorders
Analog Recorders
Contact Us
PDF Pages
Price List
go directly to
Total Recall
4 to 60 channels
2 or 4 channels
2 or 4 channels/PC
Total Recall Omnia
4 to 92+ channels

Available from your local communications equipment supplier, on-line resellers, and direct from Omnicron
Purchase your Voice Logging Recorder and Accessories with payment via credit card 
Net-30-Day terms to well rated firms and Government agencies. Payment can be made via credit card, check, or wire transfer.
Same day shipping for most orders received prior to 3:00 PM EST.

Omnicron Electronics - Professional Voice Logging Recorders and Accessories - since 1975



RSA-M2 Two-Way Radio Supervisory Adapter

IMPORTANT NOTICE:  The RSA-M2 adapter was developed for use with the original Motorola Radius series of two-way radios (mid 1980's). It will not work with newer radios that have programmable features. Confirm compatibility with your recorder and radio prior to purchase.  If an adapter is needed for recording your radio, see: RSA-M3, RSA-M4, and RSA-U5.


      The RSA-M2 is used to provide a simple and inexpensive method of connecting voice logging recorders to certain Motorola two-way radios. It only works with older Motorola radios that have an eight position modular microphone jack with receive audio present at all times. It combines receive and transmit audio at levels matched to the line input of voice logging recorders. It also provides transformer isolation and RF bypass. For newer Motorola radios that do not have constant receive audio on the microphone jack, use either the RSA-M3 or RSA-M4 adapters.


      The RSA-M2 is supplied with cables and connectors which have been wired to meet most standard applications. It can be customized to meet unusual requirements. Consult your place of purchase if cables are required with non-standard lengths, connections, or circuitry.

1. Unplug the microphone cord from your radio set and plug it into the jack on the RSA-M2 adapter.

2. Plug the short black cable from the RSA-M2 into the microphone jack on your radio. Your radio should now function normally as you have simply connected a short extension into its microphone cord.

3. The RSA-M2 can now be connected to your recorder. Its output is an 18 foot long cable with RJ-11 telephone style plug on the end. Simply plug this cable into the audio input jack on your logging recorder.

4. Locate a convenient spot on your radio to mount the RSA-M2. Ensure that there is enough slack in the cables so that they can be easily un-plugged, if required, and that it will not interfere with the operation of the radio. Use the double stick foam pad and cable ties which are included with each RSA-M2 to attach it to your radio.


      If the unit fails to work properly, recheck all connections and test your recorder to see that it is operating properly. Make sure that the microphone is only active when transmitting, otherwise you could record room sounds between transmissions (set radio jumpers, or program for switched transmit audio). Assistance is available from your place of purchase, or directly from Omnicron Electronics at the phone numbers and listed below and via this web site.


      Federal law 90-351 title 18, section 2511, sub section 2D, requires that at least one participant in a recorded conversation be informed of the recording. Check your state and local regulations for further guidelines.

bulletContact your Omnicron representative for assistance in the selection of the products that are best suited to your application.



                          Prevent costly mistakes - record all important phone and two-way radio conversations. Compact, economical recorders that document every word of your important conversations.    
                                   OMNICRON ELECTRONICS
                        554 Liberty Highway Unit 2,  Putnam, CT  06260

(860) 928-0377

(860) 928-6477

  [ Top of page ] [  Home Page ] [ Table of Contents ]