GAI-Tronics 370-301 Dual Channel 600-Ohm to 33-Ohm Converter - Manual (Page 7)

Pub. 42004-431B
370-301 Dual Channel 600 to 30-Ohm Converter Page 7 of 9
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Table 6. 33-Ohm Connections Channel 2, P12
Pin
Number
Pin Name
Function
1 NC 33-ohm active Normally closed connection of 33-ohm output VOX detection.
2 COM 33-ohm active Common connection of 33-ohm output VOX detection.
3 NO 33-ohm active Normally open connection of 33-ohm output VOX detection.
4 GND Ground reference for field wiring.
5 L1 33-ohm audio Bi-directional audio for 33-ohm interface
6 L2 33-ohm audio Bi-directional audio for 33-ohm interface
Settings and Adjustments
Opening the Station
Remove the four screws from the front panel and place the front panel to the side.
Jumper Settings
Channel 1: 33-Ohm Activation P3 - Install the jumper in the ACT (default) position to enable the 33-
ohm audio output. Install the jumper in the NON position to disable the 33-ohm audio output.
Channel 1: 33-Ohm Termination P8 - The Page/Party ® line can be terminated to 33 ohms as required
by the Page/Party ® system. Install the jumper in the TERM position to terminate the line. Install the
jumper in the NON (default) position to leave the line unterminated. For the unterminated position, a
line balance assembly is needed in the system.
Channel 1: 600-Ohm Activation P7 - Install the jumper in the ACT (default) position to enable the
600-ohm audio output. Install the jumper in the NON position to disable the 600-ohm audio output.
Channel 2: 33-Ohm Activation P9 - Install the jumper in the ACT (default) position to enable the
33-ohm audio output. Install the jumper in the NON position to disable the 33-ohm audio output.
Channel 2: 33-Ohm Termination P14 - The Page/Party
®
line can be terminated to 33 ohms as required
by the Page/Party ® system. Install the jumper in the TERM position to terminate the line. Install the
jumper in the NON (default) position to leave the line unterminated. For the unterminated position, a
line balance assembly is needed in the system.
Channel 2: 600-Ohm Activation P13 - Install the jumper in the ACT (default) position to enable the
600-ohm audio output. Install the jumper in the NON position to disable the 600-ohm audio output.