Tektronix WFM 601i, User Manual

Page: 42 / 135

Functional Check
1–24
Rev Jun 1994
WFM 601i Serial Component Monitor
.7
.6
.8
.5
.4
.3
.2
.1
–.1
–.2
–.3
Tek
COMPONENT ANALOG 2% & 4% K
PB
100%
50%
RESET H CAL
RESET V CAL
CAL SIG
ON OFF
GAIN CAL
ON OFF
V CAL
H CAL
Figure 1-18: Calibrator signal, both gains misadjusted.
8. Gain Control
There are three calibrated gain settings available (X1, X5, and X10), as well as
an independent VARIABLE GAIN control.
Turn off CH 2 and CH 3. Press the GAIN button to enter the gain menu. Press
the bezel button corresponding to X5. Check that X5 is highlighted and that the
display is immediately amplified. Press the bezel button corresponding to X10.
Check that X10 is highlighted and that the display is immediately amplified
again.
Press the bezel button adjacent to the VARIABLE ON/OFF menu selection.
Check that ON is highlighted and that one of the knobs is identified as the VAR
GAIN control. Adjust the control to the minimum gain setting. The entire signal
should now be visible on the CRT. Set the WFM VAR GAIN control to the
maximum setting and see that by adjusting the VERT POS control, any portion
of the signal can be displayed on the CRT.
Return the gain to normal by pressing the GAIN button to exit the gain menu.
The next time the gain menu is entered, the settings will be the same (variable
X10 gain). Adjust the VERT POS control to place the signal on the baseline.