Tektronix WFM 601A, Service Manual

Page: 88 / 368

Performance Verification
4–24
WFM 601A, WFM 601E, & WFM 601M Service Manual
j. Enter the CONFIG menu, select EYE PATTERN, then DISPLAY 10
EYE. Press the CONFIG button.
k. CHECK – using the timing cursors that six cycles of Eye pattern are
22.22 ns 3% (21.534 to 22.866 ns).
24. Analog Audio Display Mode (WFM 601A only)
REQUIREMENT – Audio Mode Full Scale Accuracy:
"
0.5 dB.
a. Connect the function generator output using the audio remote cable
adapter to the waveform monitor rear-panel REMOTE INPUT connector
pins 8 and 10. Ground pins 9 and 11 of the REMOTE INPUT connector.
b. To load the factory preset, press the PRESET button, use the bezel knob
to pick the FACTORY setting, then press the RECALL bezel button.
c. Select the ANALOG AUDIO display button.
d. Enter the GAIN menu and select 0 dBu.
e. Center the display dot using the VERT and HORIZ POS bezel knobs.
f. Set the function generator for a sinewave output. Set the frequency to
1 kHz and the amplitude to 2.19 V.
g. CHECK – that both trace ends are on the audio box cross hairs.
h. Repeat steps c through g for each Gain and signal amplitude setting in
Table 4–1.
Table 4–1: Audio values
Gain Signal amplitude (V
PP
)
0 dBu 2.19 V
4 dBu 3.47 V
8 dBu 5.50 V
12 dBu 8.71 V
25. Audio Phasing and Bandwidth (WFM 601A only)
REQUIREMENT – X/Y Input Phase Match:
v
1
°
(at 20 kHz).
Audio Bandwidth: –3 dB at
w
500 kHz.
a. Enter the GAIN menu and select 0 dBu.
b. Set the function generator for a sinewave output. Set the frequency to
20 kHz and the amplitude to 2.19 V.