Page 9 of 23
DWG ID: 181-0101-01
Date: 2003-08-12
equipment, and have an output which can drive the FM demodulator and
frequency counter at the correct level.
Audio oscillator: Must have sine wave and square wave output and adjustable output
frequency and amplitude.
Voltmeter for dc: 10 M input impedance. Any good DMM will have this.
Oscilloscope: 20 MHz bandwidth and X10 probe.
Power Supply: Capable of approximately 12 V dc at 3 A.
Note that alignment instructions are written for a service monitor.
5.2
Alignment Procedure
It is not necessary to perform all alignment steps detailed below. However, some
adjustments have interaction with others (e.g.: balance affects deviation and output power
has a slight affect on TX frequency trim). It is recommended to spot check all
adjustments.
Refer to the last section of this manual for parts lists, schematic diagrams, and parts
layouts.
After removing the cover:
•
Jumper A2J8 with A2P3
•
Be sure A2P2 is in place across A2J7
•
Connect a PC to the TALON Series unit Serial I/O port via an RS232 cable assembly
•
Open a communications program, such as HyperTerminal™ found in Windows™.
Set communications for COM port you set up (usually COM1), 38400 baud, no
parity, 8 data bits, and 1 stop bit
•
Attach the ANT connector to a communications service monitor
•
Apply dc power to the unit
•
Observe the correct display on the PC’s VDT
Note:
•
Press the “Esc” key to get out of any command
•
Press the “B” key (PERM Radio parameters), when not in any other command, at any
time to make adjustment parameters permanent
5.2.1
TRANSMIT AND RECEIVE FREQUENCY
Set transmit and receive frequencies with the “T” key to frequency of operation.
Note: If the receive frequency is the same as the transmit frequency, just enter the
transmit frequency. Receive frequency will be set automatically. Otherwise, press the “R”
key and set the receive frequency.
5.2.2
RX FREQUENCY TRIM