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WFM 601A, WFM 601E & WFM 601M User Manual
CALIBRATE. Allows minor adjustment to the vertical and horizontal gain
calibration prior to making amplitude measurements. To adjust gain, you need a
700 mV, 100 kHz signal. Use a known external reference signal or the internal
calibrator signal. Selections for the CALIBRATE menu are only present when in
the Waveform or Parade display modes.
H CAL SIG. Turns on or off the internal 700 mV calibrator signal. The
calibrator signal is synchronized in order to provide an accurate 100 kHz
timing standard. If the calibrator signal varies significantly from 700 mV
when RESET V CAL is not visible, then the waveform monitor may require
calibration.
H GAIN CAL. Enables or disables the V CAL and H CAL controls. The
V CAL knob adjusts vertical gain and the H CAL knob adjusts the horizontal
gain. To return the gain to its original calibrated setting, press the RE-
SET V CAL or H CAL bezel buttons.
In addition, the following software version information appears:
H Software Version Number. The lower right corner of the CRT shows the
version number for the instrument software preceded by a “V”.
H Coprocessor Code Version. The lower right corner of the CRT shows the
version number of the serial coprocessor code preceded by a “C”.
CRT Settings
The CRT menu provides control of trace parameters and readout intensity. To
access the CRT menu at any time, press the MENU CRT button. Press the top
bezel button to access the Display, Readout and Trace controls. Use the assigned
bezel knobs to adjust the display. You can control the following functions from
the CRT menu:
H Focus. Sets the sharpness of the waveform trace.
H Scale. Sets the intensity of the side lights that illuminate the etched graticule.
H Intensity. Sets the trace intensity or brightness separately from the readout.
H Readout Intensity. Sets the readout intensity or brightness.
H Trace Rotation. Adjusts the rotation of the trace.
Readout intensity can be turned below the minimum viewing level, which makes
all CRT menus disappear. If this happens, press the CRT menu button and note
that the menu comes up at a reduced intensity. Pressing the top CRT bezel button
once moves the cursor to READOUT and reduces the intensity again. At this
How to Recover from
Minimal Readout Intensity