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Audio panels
A line of radio operator terminals developed by Ro.Ma. enginery for Voice/CW transmission and reception.
With the high standards of reliability and performance
of military and professional applications. The terminals are configured as a Rack
Standard 19” 3U unit, with front panel controls and connectors.
Audio Panel MR-0506 is a voice and telegraphy Rx/Tx terminal for radio operators. Provided with all the audio and telegraph interfaces, it allows Simplex/Duplex connection to a
radio transmitter and a radio receiver.
Main features:
Two physically separated functional sections, one dedicated to the local
management of audio terminals (headset, handset, loudspeaker), one to the Morse key.
Selection of any of the following modes of operation:
Voice
transmission and reception over headset with boom microphone in the Simplex/Duplex mode, PTT delay of 200millisec approx. CW transmission and reception with Morse key in the Simplex/Duplex mode,
generation of a 1000Hz tone and 1sec. approx. PTT delay.
Front panel controls for:
Digital adjustment of the headset and loudspeaker volume Switching the loudspeaker in/out Sidetone in the simplex mode Input for Tx PTT indication on a front panel led Automatic connection to an external generator for selective calls Modular construction in a 19” Rack 42 TE,3 U configuration Circuits assembled into two cards, one dedicated to the interconnection of the front
panel connectors, switches and pushbuttons, one to the interface and management functions
Technical characteristics:
Rx audio line |
qty 1, balanced , 600 Ohm,0 dBm nominal level |
Tx audio line |
qty1 balanced, 600 Ohm nominal, 0 dBm , adjustable in the -6dBm to 0dBm range |
Microphone input |
qty1, unbalanced,200 Ohm nominal, -40 dBm |
Selcal/centralization input |
qty1, balanced 600 Ohm nominal, 0 dBm |
Headset output |
qty 1, unbalanced ,600 Ohm nominal, 1 mW |
Loudspeaker output |
qty 1, 8Ohm nominal , 1 W max |
Selcal/centralization Rx audio output |
qty 1,unbalanced, 600 Ohm nominal with headset and loudspeaker volume adjustment
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CW modulation |
Dedicated key, 1kHz, 0dBm over a Tx line |
CW key input |
Open connection/closed connection circuit |
PTT output (all modes) |
Open/ground , Vmax =50 Vdc / 100mA |
PTT hold-on time |
Voice : 200 mSec , CW : 1
Sec Centralization: 200 mSec |
Voice PTT input |
Open/ground |
Selcal/centralization PTT input |
Open/ground |
Sidetone |
Only on simplex mode on headset and loudspeaker |
Primary power |
100Vac to 220Vac |
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