Sangean MMR-77, Service Manual

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5. ALIGNMENT FOR MW SENSITIVITY
a. Required Instrument
RF signal generator
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Set the power switch to ON position.
(2) Connect a SSVM to the AF out (TP3 and TP4).
(3) Connect the AM signal generator to the loop antenna
(4) Set signal generator to 600KHz, with 30% modulation set tuning to signal,
and adjust L1 for maximum reading on SSVM.
(5) Set signal generator to 1400KHz set tuning to signal, and adjust TC1 for
maximum reading on SSVM.
MW
L1
TC1
(6) Repeat steps (4) and (5) until best sensitivity is obtained at both frequencies.
c. Instrument Connection
TC1
L1
50
Ω
(60 cm)
L1 Antenna Bar
Signal Generator
TP3
TP4
SSVM
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