Becker Designed AR 3201 operation manual Installation wiring General, Microphone connection

AR 3201 - ( )

The temperature measuring circuit in the VHF transceiver and the temperature sensor are calibrated in the factory together for optimum temperature measuring accuracy. Should the device or the temperature sensor develop a fault or should the transceiver need replacing, the device will need recalibrating according to the instructions as given in Section 5, Item 5.7.

2.4Installation wiring

2.4.1General

Fig. 2-5 illustrates the installation wiring of the VHF transceiver. In wiring the VHF transceiver the battery voltage feeder cable should be AWG 20.

NOTE

a)Only use airworthy cable, i.e. self-extinquishing in suitable AWG for power supply and the other lines.

b)Pull rubber sleeves over the solder juctions on the instrument connector.

c)A 3 A fuse or circuit breaker must be incorporated in the power supply.

d)Prior to switching on the unit, carefully check the wiring, particularly making sure that +ve and -ve are not confused.

CAUTION

The AR 3201 - ( ) is only protected against wrong polarity when a fuse is incorporated in the power supply, i.e. so that the fuse blows, leaving the unit undamaged. If no fuse is provided, the unit can be ruined. In this case, the unit is not covered by our guarantee.

Suitable type cable sets are available for aircraft wiring (contact manufacturer).

CAUTION

Never tie any aircraft wiring into the connecting lines. In addition, the connecting cable must not be put down together with line carrying pulsed information (IFC’s, DME, XPR, SLAVED GYRO) the same applying to autopilot supply and control lines.

2.4.2Microphone connection

The VHF-transceiver features a microphone amplifier as standard which is compatible with both a dynamic microphone and a standard microphone. Unless stated otherwise, the transceiver is set in the factory for a dynamic microphone connection. By resoldering jumper Br 4001 on the audio module the microphone input can be changed from a dynamic microphone to a standard microphone. This jumper is accessible after unscrewing the case and removing the audio module. As of serial No. 86, conversion from dynamic to standard microphone has been simplified, jumper 4401 then no longer requiring resoldering but merely reconnecting, without requiring removal of the audio module.

Page 2-2 DV 28110.03/.04 Issue 04/92