Philips CE120, Service Manual

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MEASUREMENT SETUP
Tuner FM
DUT
RF Generator
Bandpass
LF Voltmeter
e.g. PM5326
250Hz-15kHz
e.g. 7122 707 48001
e.g. PM2534
S/N and distortion meter
e.g. Sound Technology ST1700B
R
i=
5
0
Ω
Use a bandpass filter to eliminate hum(50Hz,100Hz) and disturbance from the pilottone(19kHz,38kHz).
Tuner AM (MW,LW)
DUT
RF Generator
Bandpass
LF Voltmeter
e.g. PM5326
250Hz-15kHz
e.g. 7122 707 48001
e.g. PM2534
S/N and distortion meter
e.g. Sound Technology ST1700B
R
i=
5
0
Ω
Frame aerial
e.g. 7122 707 89001
To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday s cage.
Use a bandpass filter ( or at least a high pass filter with 250Hz) to eliminate hum ( 50Hz,100Hz ). '
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