Sangean DT-120 Service Manual page 8

4. ALIGNMENT FOR AM SENSITIVITY
a. Required Instruments
AM Signal Generator
SSVM
b. Alignment Procedure
Mode Adjustment
CT1
AM
ANT1
c. Instrument Connection
AM Signal Generator
Loop Antenna
(1) Turn on the radio.
(2) Connect a SSVM to the speaker H.P JACK and GND terminals.
(3) Connect an AM signal generator together with standard loop dummy antenna and
feed 30% modulated signal to the AM ferrite bar antenna (ANT1).
(4) Tune the generator frequency to 1404 KHz.
(5) Tune the AM frequency to 1404 KHz and adjust CT1 to have a max reading on SSVM.
(6) Return the generator frequency to 603 KHz.
(7) Tune the AM frequency to 603 KHz and adjust ANT1 to have a max reading on SSVM.
(8) Repeat (4) to (7) as necessary to minimize tracking error.
60 cm
The radio is located
perpendicularly to
the Loop Antenna
8
Procedure
CT1
ANT1
HEAD PHONE JACK O/P
GND
DVM