Panoramic TVP-2914, Руководство по обслуживанию

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TVP-2914
8
e) Adjust the Stereo/SAP generator for 400 Hz sine wave and 100%
modulation.
f) Active the SAP function in the Test Television.
g) Read Vac at the AC volt-distortion-meter.
h) Repeat all above procedures, connecting the volt-distortion-meter at the
Right channel
Minimum Nominal Maximum Unit
Output Level
450,00 500,00 550,00 mV
AC
Distortion (THD)
0,20 1,00 1,50 %
2.1.7 AM Rejection
a) Connect at the IF sound input a FM generator adjust to 4.5 MHz modulated
with 400 Hz sine wave and +/- 25 kHz deviation and 90 dBuV level.
b) Connect na AC voltmeter in the audio detector output (after the emphasis
circuit) and read the VFM tension.
c) Connect at the IF sound input a AM generator pre-adjust to 4.5 MHz 30%
modulated with 400 Hz sine wave, and 90 dBuV level.
d) Read the Vam value in the voltmeter.
AM rejection will now be calculated by the equation:
Rej
AM
= 20 log(V
FM
/V
AM
)
Note:
ü
Because this parameter is designed to define only the
one circuit TV perform, the startup conditions adjust and
what’s circuits will be supplied, it will be defined
separately for each one model
.
Minimum Nominal Maximum Unit
30,00 40,00 60,00 dB
2.2 POWER SUPPLY
2.2.1 Consume
Consume
a) Connect the TV under test through a electronic wattmeter at the
220Vac/60Hz line.
b) Turn-on the TV set and apply a 60dB
µ
V ( the preferred channel must to be
defined by the production unit), modulated with a 88% video signal white
pattern, and a
±
25 kHz deviation FM carrier with a 400Hz sine wave audio
signal.
c) Adjust for max. the bright, contrast and volume controls, and read the Sink
Power show at the wattmeter.
d) Active Standby mode and read again the Sink power.