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Performance Verification
WFM90D and WFM91D Service Manual
4-3
Table 4- 1: Summary verification procedure (Cont.)
Procedure Page #Procedure requirement
Vector phase stability Phase Shi ft with Subcarrier Frequency Change from F
SC
to F
SC
ᐔ50 Hz
(F
SC
ᐔ10 Hz PAL): ᐔ2°. Phase Shift with Burst Amplitude Change from
Nominal to ᐔ6 dB: ᐔ2°. Phase Shift with Variable Gain Control Varied
from +3 dB to --6 dB: ᐔ1°.
4--11
Chrominance bandwi dth Chrominance Bandwidth: Upper --3 dB Point: F
SC
+ 500 kHz, ᐔ100 kHz.
Lower --3 dB Point: F
SC
-- 500 kHz, ᐔ100 kHz.
4--12
Audio gain and frequency response Measurement Accuracy: 0.5 dB at 1 kHz. Frequency Response: 0.5 dB
from 50 Hz to 20 kHz.
4--13
Digital input gain accuracy ᐔ2% for 1 V encoded video
Digital input frequency response ᐔ4% from 50 KHz to 4.5 MHz
Digital input frequency response X5 ᐔ5% from 50 KHz to 4.5 MHz
Equipment Required
Table 4--2 lists the required equipment and accessory items to perform the
performance verification procedures. Minimum equipment specifications are
followed by an example of equipment that meet these specifications.
An accuracy ratio of 4:1 or be tter for the warranted specifications will be
obtained using the equipment recommended in Table 4--2 with the following
exceptions:
H Audio Amplitude: 2.5:1
H Audio Flatness: 2.5:1
Table 4- 2: Equipment required for performance verification
Equipment description Minimum requirements Equipment example
Analog television test signal
generator
Color test signals for the television standard of
the monitor to be tested: color bar signal, pulse
and bar; with 2T pulse, 2T bar, and modulated
pulse, field square wave signal, and black burst
signal
NTSC: Tektronix 1410
2
TV Test Signal Generator
with Option AA and Option AB (modified SPG2
and TSG7), TSG3, and TSG5
PAL: Tektronix 1411
2
TV Test Signal Generator
with Option AA and Option AB (modified SPG12
and TSG17), TSG13, and TSG15
Serial digital television test
signal generator
Color test signals for the television standard of
the monitor to be tested: color bar signal, pulse
and bar; with 2T pulse, 2T bar, modulated pulse,
and line sweep.
TSG601 Handheld Serial Component Signal
Generator
Leveled sine wave generator Output Level Range: --11.55 dBm (200 mV) to
0.43 dBm (800 mV);
Frequency: 50 kHz to 10 MHz
Tektronix SG 503
3
Leveled Sine Wave Generator