Realisitic
TRC-435
Documentation Project
CBTricks.com
PLL And Transmitter ALIGNMENT PROCEDURE
PLL Section
Test
Equipment Required
DC Power Supply: 13.8 V/2A
DC Voltmeter
Dummy load (50-ohm)
Alignment Procedure
|
Step |
Preset to |
Adjustment |
Remarks |
|
1 |
TX 40 CH |
L702 |
Connect the DC voltmeter to VCO (TP1). Adjust L702 for 4.5 V ± 0.1 V reading on the DC voltmeter. |
|
2 |
RX 40CH |
L701 |
Same as step 1. |
|
3 |
TX / RX 1-40 CH |
- |
Check if the DC voltage on all channels is kept within 2.1V to 4.6V at TP1. |
Test Equipment Connection
Transmitter Section
Test
Equipment Required
DC Power Supply: 13.8
V/2 A
SSVM
Modulation Meter
AF Oscillator
RF Power Meter
Dummy load (50-ohm)
& Attenuator
Alignment Procedure
|
Step |
Preset to |
Adjustment |
Remarks |
|
1 |
Mod. Input 100 mV Mod.: 85% |
L9 and L12 |
Connect the AF oscillator to pin 3 and pin 4 of the microphone jack (J401) and the SSVM to TP4. Adjust coils for maximum reading on the SSVM. |
|
2 |
No modulation |
L9 |
Connect the RF power meter to the antenna jack (J501). Adjust L9 for 4.0 W reading on the RF power meter. |
|
3 |
Repeat above adjustments until no further change can be noted. |
||
|
4 |
Same as step 1 |
VR4 |
Connect the modulation meter across the dummy load and attenuator to antenna jack (J501). Adjust VR4 for 95% modulation. |
|
5 |
No modulation |
VR3 |
Adjust VR3 until fifth digit of LED lights on. |
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.