C148GTL DX ALIGNIMENT PROCEDURE
1. Test Equipment Required
a) Oscilloscope (0-5MHz).
b) DC Voltmeter (10 Volts Max., 100k ohm/Volt).
c) Frequency Counter.
2. Aiignment Procedure.
Aiignment of PLL Portion.
LATE
VERSION
STEP
PRESET ТО
CONNECTIONS
ADJUSTMENT
PROCEDURE
1 RX. Mode.
Band SW: Mid
CH :19
Mode :AM
Connect Oscilloscope to
TP-4 (lead of R124).
L17 Adjust for Max. reading.
2
Same as Step 1,
except CH: 40
Connect DC Voltmeter to
TP-2 (Lead of R126) .
L18
Adjust for 5.4 Volts re
ading .
3
Saine as Step 1. Connect Oscilloscope to
TP-3 (Lead of R84).
L19
Adjust for Max. reading.
4 Same as Step 1.
Same as Step 3
L21 Adjust for 16.490MHz.
5
Same as Step 1,
except Mode SW:USB
Same as Step 3 L22 Adjust for 16.4925MHz.
6 Same as Step 1,
except Mode SW:USB
Same as Step 3. L23 Adjust for 16.4875MHz.
7
Same as Step 6,
except Band SW:Mid
Same as Step 3. VR6 Adjust for 16.4875MHz.
8
Same as Step 1,
except Mode SW:CW
Connect Oscilloscope to
TP-6 (Lead of R60)
L37
Adjust for 10.695MHz.
9
Same as Step 8,
except Mode SW:USB
Same as Step 8 L38
Adjust for 10.6925MHz.
10
Same as Step 8,
except Mode SW:If>B
Same as Step 8
L39 Adjust for 10.6975MHz.
37
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