Tektronix TEKFAX ADA400A, Инструкция по эксплуатации

Страница: 46 / 80

Performance Verification
34
ADA400A Differential Preamplifier
6. Adjust the Coarse knob to bring the oscilloscope trace back to the center of
the screen.
7.
Set the vertical gain on the oscilloscope to 100 mV/div.
8. Slowly adjust the Coarse knob to bring the oscilloscope trace to the bottom
of the screen.
9. Adjust the Fine knob fully CW.
10. Verify that the oscilloscope trace raises at least 4 divisions on the display.
Equipment
Required One digitizing oscilloscope (item 1)
One sine wave generator (item 2)
One dual input coupler (item 6)
One 50
Ω
terminator (item 7)
Two 10X attenuators (item 8)
Two coaxial cables (item 9)
1. Connect the ADA400A to Ch1 of the oscilloscope and make the equipment
settings according to Table 12.
Table 12: Equipment Settings for X100, 100 kHz CMRR Checks
ADA400A Setting
+ Input DC
-- Input Gnd
Gain 100
Upper Bandwidth FULL (1 MHz)
Offset Off
Oscilloscope Setting
Vertical gain 2 mV/div
Time base 5 s/div
Acquisition mode Average
Number of waveforms to average 20
Trigger source Ch4
Sine Wave Generator Setting
Output 100 kHz, 1 Vp-p into 50
Ω
CMRR