Vertex Standard VX-4200 service manual Dsub 15-pin Accessory Connector, Pin 5 Rssi Analog Output

Pin 1: AF IN (ANALOG INPUT)

External Microphone Input. Nominal input level is 6 mV at 600-ohm.

Pin 2: AF OUT (ANALOG OUTPUT)

Low-level receiver output. Peak signal level is 150 mV at 600-ohm.

Pin 3: AF GND

Ground for all logic levels and power supply return.

Pin 4: DC OUT (13.6 V DC OUTPUT)

Switched 13.6V output for supplying power to an ac- cessory.

Pin 5: RSSI (ANALOG OUTPUT)

A DC voltage proportional to the strength of the sig- nal currently being received (Receiver Signal Strength Indicator) is provided on this pin. This low impedance output is gererated by the receiver IF sub-system and bufferd by an internal op-amp. Typical output voltages are 1 V (@No Signal Input) through 2.0 V (@50 dB Sig- nal Input).

Pin 7: TRX

This port is intended for controlling an external TX/ RX switching circuit. When the transceiver is placed in the the Receiver mode, this port is 5 V. When the transceiver is placed in the the Transmit mode, this port reduse to 0 V.

Pin 8: ING (IGNITION SENSE FEATURE)

The VX-4100/-4200 may be automatically be switched to the STND-BY mode when the vehicle's ignition key is turned on. Maximum current is 20 mA.

Pin 9 - 12: ACC1 - ACC4 (ACCESSORY PORT)

These output port features can be programmed via the CE59 programmer. Each port is open collector output which can sink approx. 30 mA when active.

Pin 13: Not Used

Pin 14: Not Used

Pin 15: GND

Chassis ground