Tektronix 1740A/1750A - Manual (Page 79)

Using the Menus
1740A/1750A Series Waveform/Vector Monitor User Manual
3-24
Gain Menu
H Any one of three calibrated gain ratios can be selected:
X1
,
X5
, or
X10
. Variable gain is also available, indepen-
dent of the other gain settings. When variable gain is on,
the left bezel control adjusts the signal gain.
H Audio or Time Code gain is set from the GAIN menu
when AUDIO or TIME CODE display is selected. Gain
choices are 0 dBu, 4 dBu, 8 dBu, or 12 dBu. Select gain
relative to the system under test.
H When variable gain is turned off, the instrument returns
to the calibrated gain setting. Operator adjustments
made with variable gain will be restored when variable
gain is selected again.
CRT Menu
H
DISPLAY is used for signal and etched graticule adjust-
ments. When DISPLAY is selected, the left bezel control
adjusts the signal focus ( FOCUS), the center bezel
control adjusts the etched graticule illumination (SCALE)
and the right bezel control adjusts the signal intensity
(
INTENSITY).
H READOUT refers to electronic graticules, markers, menu
and measurement readouts. When READOUT is selected,
a test pattern containing a vertical line and a horizontal
line is displayed. Use the left bezel control
(VPOS) and
the center bezel control (HPOS) until the lines cross at
the center of the etched graticule. This will compensate
for minor shifting of markers due to drift or external
magnetic fields (particularly if the instrument is moved
after the markers are set).
The right bezel control adjusts readout intensity (INTEN-
SITY). Readout intensity will not go below the calibrated
minimum value when menus are displayed.
H TRACE adjusts trace rotation
Exiting the menu will return the instrument to normal opera-
tion, with the new settings in effect.