C148GTL DX ALIGNMENT PROCEDURE
ALIGNENT OF PLL AND CARRIER OSCILLATOR SECTION.
1. Test Equipment Required:
a) Oscilloscope
b) DC Voltmeter
c) Frequency Counter
2. Alignment Procedure.
STEP
PRESET ТО
ADJUSTMENT
REMARKS
1
CH :19
RX Mode
Mode AM
Voice Lock:
Center
Band: MID
LI 4
Connect Oscilloscope to TP4 (lead of R83).
Adjust for maximum indication on Oscillo
scope.
2
Same as above,
except:
CH : 40
L15 Connect DC Voltmeter to TP2 (lead of R93).
Adjust for 5.4V reading on DC Voltmeter.
3
Same as Step 1
L16
Connect Oscilloscope to TP3 (lead of
R101). Adjust for maximum indication on
Oscilloscope.
4
Same as Step 1 L31
Connect Frequency Counter to TP3 (lead of
R101). Adjust for 16.490MHz + or - 20Hz.
5 Same as Step 1
CH : 40
Mode : USB
L32
Adjust for 16.4925MHz + or - 20Hz.
6 Same as Step 1
CH : 40
Mode : LSB
L33 Adjust for 16.4875MHz + or - 20Hz.
7
Same as Step 6,
CH : 40
TX Mode
VR6 Adjust for 16.4875MHz + or - 20Hz.
8
Same as Step 1
CH : 40
Band : Lew
L22 Adjust for 16.040MHz + or - 20Hz.
Effectivity: S/N 03000001-4498
S/N 13000001-1504
EARLY
VERSION
Note: Two TP4 are noted on procedure. One is R83 and the other one is R114.
8
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