![]() ![]() 86 by resoldering a jumper on the soldering side of the audio module. Conversion to a standard microphone is done in transceivers up to serial No. The microphone input is designed for a dynamic microphone or for a standard microphone, the transceiver being infactory-set for a dynamic microphone. The injection frequency of the receiver and the transmit frequency of the transmitter are generated by a voltage-controlled oscillator (VCO) which is signalled by a digital frequencysynthesizer in conjunction with a microprocessor. of 4000 and above, an arrow flashes on and off in the upper left side of the LCD during transmission In transmitter operation sidetone is automatically on. Transmitter output power is greater than 5 watt. The transmitter has wideband tuning over the range 118.000 MHz to 136.975 MHz. The squelch can be defeated with the squelch switch. The switching threshold is adjustable from without through the case. A squelch circuit suppresses noise and input signals below a specific field strength. The transceiver features a single superhet receiver. The rear panel locates the connector for connecting the transceiver to aircraft wiring, the antenna socket and a test connector. AII controls and indicators are located on the front panel. Mounting is by means of four screws (behind-panel fitting). The VHF transceiver is designed as a single-block unit with dimensions in keeping with 58 mmdiameter standard instrument size. The VHF transceiver is designed for compliance with RTCA and EUROCAE airworthiness requirements. In the environmental categories there is no limitation for application in the instrument panel and for use in The VHF transceiver is physically designed for unrestricted application in category II aircraft. Extensions for additional modes such as temperature and operating voltage measurements, etc. It can also be limited to 135.975 MHz = 720 channels by incorporating a different PROM. The VHF transceiver permits transceiver communication on 760 channels in the frequency range 118.000 MHz to 136.975 MHz with a channel spacing of 25 kHz. The Handbooks DV 28110.03 (, Installation and Operation ‘‘) and DV 28110.04 (,Maintenance and Repair‘‘) contain the following sections : The following Handbooks describe the VHF-communications transceiver AR 3201 - ( ). Optional temperature, voltage measurement.Setting the emergency frequency on models with serial numbers of 4000 or above.Setting the emergency frequency on models with serial numbers up to 3999.2-6 Wiring diagram AR 3201 - ( ) with Speaker - Junction Auxiliary audio input (optional) (standard as of module No.Mechanical installation of a temperature sensor.Mechanical installation VHF transceiver. ![]()
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