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Adjustment Procedures
Adjustment Procedures
5Ć16
Attenuator Compensation
Equipment Required: One pulse generator (item 10), one precision coaxial
cable (item 5), one 50 W termination (item 3), and one dualĆinput coupler
(item 7).
Adjustment Locations: This procedure requires adjustments to the Analog
board. See Figure 5Ć15 on page 5Ć20 for the location of the adjustments.
Prerequisites: Low Frequency Output Compensation adjustment proceĆ
dure.
1. Display channel 1, turning all others off.
2. Connect the high amplitude output of the pulse generator to the CH 1
and CH 2 inputs as shown in Figure 5Ć13.
50 W Termination
DualĆinput
Coupler
Precision Cable
Pulse Generator
Figure 5Ć13:ăAttenuator Compensation Test Setup
3. Set the pulse generator high amplitude period to 1 ms.
4. Press the AUTOSET button.
5. Press the VERTICAL MENU button and set CPLG to DC.
6. Set the volts/div scale to 200 mV.
7. Set the sec/div scale to 200 ms.
8. Using the vertical POSITION control and the generator pulse amplitude,
obtaina5division, vertically centered display of channel 1.
9. Set the volts/div scale to 100 mV.
10. Press the CH 2 button.
11. Press the VERTICAL MENU button and make the following selections
from the menu:
H Set CPLG to DC
H Set VAR to Off