Measurement Setup - Philips MCW770 Service Manual

TECHNICAL SPECIFICATION
CD module:
To be measured on COMBI BOARD connector 1015 .
frequency response : 20Hz - 20.000 Hz ±3dB
: ≥ 76dB (A-weighted)
signal/noise ratio
: ≤ 0,5% at 1 kHz)
distortion
: ≤ 1dB at 1 kHz
channel difference
: ≤ -60dB at 1kHz
channel crosstalk
de emphasis : 0 or 15/50µs switched automatically by subcode on the disc
laser
output power : 500µW
wave length : 780 ±20nm
Wireless module „WESSLI":
frequency response : 20 - 20.000 Hz ±3dB
: ≥ 94dB (A-weighted)
signal/noise ratio
: ≤ 0,05% at 1 kHz)
distortion
: ≤ 1dB at 1 kHz
channel difference
: ≤ -75dB at 1kHz
channel crosstalk

Measurement setup

Tuner FM
DUT
RF Generator
e.g. PM5326
Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).
Tuner AM (MW,LW)
DUT
RF Generator
e.g. PM5326
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).
CD
Use Audio Signal Disc SBC429 4822 397 30184
(replaces test disc 3)
DUT
L
R
S/N and distortion meter
e.g. Sound Technology ST1700B
LEVEL METER
e.g. Sennheiser UPM550
To be measured on COMBI BOARD connector 1022 .
Bandpass
LF Voltmeter
250Hz-15kHz
e.g. PM2534
e.g. 7122 707 48001
S/N and distortion meter
e.g. Sound Technology ST1700B
Bandpass
LF Voltmeter
250Hz-15kHz
e.g. PM2534
e.g. 7122 707 48001
S/N and distortion meter
e.g. Sound Technology ST1700B
with FF-filter
1-3