HP 8753D, Руководство пользователя, Страница: 93 / 678

Osetting Limit Lines
The limit oset functions allow you to adjust the limit lines to the frequency and output level
of your device . F or example , you could apply the stimulus oset feature for testing tunable
lters . Or , you could apply the amplitude oset feature for testing variable attenuators , or
passband ripple in lters with variable loss .
This example shows you the oset feature and the limit test failure indications that can appear
on the analyzer display .
1. T o oset all of the segments in the limit table by a xed frequency , (for example , 3 MHz),
press:
4 SYSTEM 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LIMIT MENU
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LIMIT LINE OFFSETS
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
STIMULUS OFFSET 4
3
5 4
M/
5
The analyzer beeps and a FAIL notation appears on the analyzer display , as shown in
Figure 2-40.
Figure 2-40. Example Stimulus Oset of Limit Lines
2. T o return to 0 Hz oset, press:
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
STIMULUS OFFSET 4
0
5 4
x1
5
3. T o oset all of the segments in the limit table by a xed amplitude , press:
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AMPLITUDE OFFSET 4 5 5 4 x1 5
The analyzer beeps and a FAIL notation appears on the analyzer display .
4. T o return to 0 dB oset, press:
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AMPLITUDE OFFSET 4 0 5 4 x1 5
2-44 Making Measurements