70-0671 Alignment Procedure
SETUP
1
Remove the six securing screws from the bottom cover , and the cover itself.
2
Connect a resistive 50
Ω
RF load and wattmeter to Antenna Connector J502.
3
Connect 13.4V DC power to transceiver J505.
4
Connect a 3.2
Ω
, 20W resistor to pins 4 and 6 of the Accessory Plug. The jumper
between pins 5 and 6 must be temporarily removed to make this connection .
The resistor serves as a constant load to replace the speaker’s inconsistencies.
CAUTION:Both speaker terminals are LIVE. Never ground either one. Connect grounded receive-audio
measuring -equipment to only one side of the speaker, and chassis ground. Normally, voltage
measurement will be half of true values.
5
Turn the radio on (Push on and Push off switch), set the VOLUME control to
a mid-position.
Connect the Programmer to Programming Port Mic Jack J302.
Upload the radio programming Data -Packet into the Programmer and
initiate its Remote Control Mode. Refer to the appropriate manual for details.
SYNTHESIZER ALIGNMENT
•
VCO Resonance
1
Select the Remote Control Mode of the Programmer and enter the following test
frequencies:
A -Band
B-Band
C -Ban d
RX Frequency
30.00
36.00
42.00 MHz
TX Frequency
30.00
36.00
42.00 MHz
2 Adjust Channel RX Tank L713 for 1.5V DC at VC (VCO Steering) .
3 Active transmit mode (using the programmer ) and adjust TX Tank
L702 for 1.5V DC at VC (VCO Steering) .
