Tektronix 1740A/1750A - Manual (Page 43)

Operator’s Checkout Procedure
1740A/1750A Series Waveform/Vector Monitor User Manual
2-13
Enter the CRT menu. DISPLAY will be outlined. Adjust the
bezel controls for optimum focus, graticule scale illumina-
tion, and signal intensity. Select
READOUT and adjust the
right bezel control for desired readout intensity. Select
TRACE and adjust the center bezel control for a level trace.
Exit the CRT menu. The changes made while in the menu
remain in effect.
3. Input Channel Selection
Press the EXT and PARADE buttons. Check that CH-A, CH-A1,
CH-A2, and CH-A3 inputs are selected.
The CH-A signal should appear on the left side of the CRT.
Move the generator signal (and EXT REF cable) to CH-A1.
The display should move to the right. Repeat this step until
the signal is connected to CH-A3 and the display is at the far
right-hand side of the screen.
Change the input selections to CH-B, CH-B1, CH-B2, and
CH-B3. Repeat the process of moving the generator signal.
4. Check Gain
The 1740A/1750A--Series internal calibrator can be used to
check instrument calibration. Select
CH-A input and set the
generator for NTSC Color Bars output.
Enter the configuration menu and select CALIBRATE . Turn on
the calibrator signal and note that the amplitude is 140 IRE
(1.0 V PAL), with one cycle per division. See Figure 2-6.
Select VECTOR display mode. Note that the calibrator signal
overlays the compass rose. Return to WAVEFORM display
mode.
Exit the configuration menu. Note that the calibrator signal
is automatically turned off. (For more information on using
the calibrator signal, see page 3-21 and page 4-17.)