Tektronix WFM 601A, Service Manual

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Performance Verification
4–10
WFM 601A, WFM 601E, & WFM 601M Service Manual
g. CHECK – the vertical amplitude on the scope display is from
0.72 to 0.88 volts.
h. Remove the cable from the SERIAL OUT connector.
i. Enter the GAIN menu and select VARIABLE gain.
j. Select X5 and adjust VAR GAIN to make the last step of the color bar
staircase 4 divisions high.
k. Select X10 gain.
l. CHECK – that the last step of the color bar staircase is now eight
divisions in amplitude.
m. Select X5 gain.
n. ADJUST – the VAR GAIN control for a seven division signal amplitude
(Variable gain should still be on from step i).
o. Select X1 gain.
p. Adjust the VAR GAIN for maximum signal amplitude.
q. Position the bottom of the display to the –0.3 graticule line.
r. CHECK – for a display amplitude of 9.8 divisions (–0.3 to +0.68).
s. Turn VARIABLE OFF and exit the GAIN menu.
t. Enter the CONFIG menu and select CALIBRATE. Turn CAL SIG ON.
Press the CLEAR MENU button to turn off the readout.
u. CHECK – for a calibrator signal display of 700 mV 7 mV.
v. Press the CONFIG button, and turn CAL SIG OFF.
w. Press the CLEAR MENU button.