|RT9080 4W E&M Radio
The RT9080 E&M Radio contains a VHF or UHF full duplex radio and an interface board. The interface board uses a microprocessor to control the radio and it provides a 4W E&M interface which is accessible on a DB-15 connector at the rear of the unit.
The audio levels are adjusted to +7dBm and 16dBm.
A ground on the E lead (pin 2 of the DB 15 connector) keys the transmitter.
Transmit 4W audio is on pins 4 and 12; level is preset for 3.5kHz deviation with +7dBm input.
Receive 4W audio is on pins 3 and 10; level is preset to 16dBm output at 3.5kHz deviation.
Receive COR activates the M relay which places a short between pins 1 and 9 (M lead).