Tektronix WFM 601A, Руководство по обслуживанию

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Performance Verification
WFM 601A, WFM 601E, & WFM 601M Service Manual
4–25
c. Move the waveform onto the audio graticule using the VERT and
HORIZ POS bezel knobs. Make sure that both ends of the trace are
within the
1
/
2
dB target boxes.
d. CHECK – for no more than a trace width of eye opening in the audio
signal (1%).
e. Set the function generator frequency to 500 kHz.
f. Disconnect the signal from pin 8 of the rear-panel REMOTE connector.
g. CHECK – for a horizontal line greater than 5.6 divisions long.
h. Reconnect the signal to pin 8 and disconnect it from pin 10 of the rear
panel REMOTE connector.
i. CHECK – for a vertical line greater than 7 divisions long.
j. Remove the function generator signal from the REMOTE connector.
26. Serial Receiver Equalization Range
REQUIREMENT – Proper operation with up to 19 dB loss at 135 MHz
using coaxial cable having 1/
√
F
loss characteristics (800 mV launch
amplitude).
a. To load the factory preset, press the PRESET button, use the bezel knob
to pick FACTORY, then press the RECALL bezel button.
b. Connect 200 meters (656 feet) of Belden 8281 coaxial cable from the
signal generator Serial Output 1 to the waveform monitor SER A
INPUT. Terminate the remaining side of the loop-through input with a
high frequency terminator.
c. Set the serial component generator output to the 100% Color Bars signal:
Modules DVG1
Signal Sets 525–270
Test Signals Color Bars
Color Bars 100% Color Bars
d. CHECK – that a video waveform appears.
e. Press the waveform monitor SERIAL button.
f. CHECK – that the EDH readout appears on screen.
g. Press the Serial menu RESET button.
h. Allow the instrument to run for at least 2.5 minutes.
i. CHECK – that the Errored Seconds, on screen, is zero.