Table of Contents
Advertisement
3. Preliminary Display Adjustments (SN 3001A and Below)
3-54 Adjustments
The pulse/function generator output must be terminated with 50
ohms.
Use a BNC tee, a 509 termination, and a BNC female to SMB
Adjustment PC Board as possible.
26. Set the pulse/function generator controls as follows:
MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NORM
Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..pulse
Frequency (FRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 kHz
Width (WID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 ns
Amplitude (AMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.OOV
Offset (OFS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.OOV
27. Set the spectrum analyzer front-panel INTENSITY control fully
clockwise. Adjust the oscilloscope trigger level for a stable display.
Note the display on the oscilloscope. The pulse should be >55V
peak-to-peak.
28. Set the oscilloscope controls as follows:
Press m):
Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...8.0 V/div
Press m).
29. Adjust AlA4R7 X POS and AlA5R7 Y POS to either extreme to
position the CRT beam off-screen (to prevent possible damage to
the CRT phosphor). If it is not sealed, adjust AlA2R5 INT GAIN
fully clockwise.
30. Adjust the spectrum analyzer front-panel INTENSITY control for
50 V peak-to-peak (6.25 divisions) as indicated
See Figure 3-22.
- 1 2 5 . 0 0 0 ns
Figure 3-22. 5OV,., Signal
31. Adjust AlA2R22 HF GAIN and AlA2ClO for minimum overshoot
on rise and minimum rise and fall times of the pulse waveform.
1 2 5 . 0 0 0 " s
5 0 . 0 ns/div
the
Display
on
the oscilloscope.
1
8 . 0 0
10.00
dc
50.00
v
Advertisement
Chapters
Table of Contents
