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Performance Verification
4–2
WFM 90 and WFM 91 Service Manual
Table 4–1: Summary verification procedure (Cont.)
Procedure Page #Procedure Requirement
Vector phase stability Phase Shift with Subcarrier Frequency Change from F
SC
to F
SC
"50 Hz
(F
SC
"10 Hz PAL): "2°. Phase Shift with Burst Amplitude Change from
Nominal to "6 dB: "2°. Phase Shift with Variable Gain Control Varied
from +3 dB to –6 dB: "1°.
4–11
Chrominance bandwidth Chrominance Bandwidth: Upper –3 dB Point: F
SC
+ 500 kHz, "100 kHz.
Lower –3 dB Point: F
SC
– 500 kHz, "100 kHz.
4–11
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
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 better 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
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
1
TV Test Signal Generator
with Option AA and Option AB (modified SPG2
and TSG7), TSG3, and TSG5
PAL: Tektronix 1411
1
TV Test Signal Generator
with Option AA and Option AB (modified SPG12
and TSG17), TSG13, and TSG15
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
2
Leveled Sine Wave Generator
Function generator Range: 0.1 to 5 Vpp when loaded by 75 W,
10 Vpp when unloaded;
Frequency: 50 kHz to 10 MHz.
Tektronix FG 503
2
Function Generator
Audio generator Amplitude Range: –10 dBu to 8 dBu;
Frequency: 1 kHz to 50 kHz
Tektronix ASG 100 Audio Signal Generator
Voltmeter Range: 0 VDC to u100 VDC;
Accuracy: "0.1%
Tektronix DM 504A
2
Digital Multimeter