HP 8568B, Руководство по испытаниям и регулировке работы, Страница: 69 / 313

14. Residual Responses
14. Residual
Responses Test
Specification
Description
Equipment
Procedure
for frequencies Hz with 0 input attenuation (no
signal present at input)
Option 100:
for frequencies Hz with 0 input attenuation
(SIGNAL INPUT 1 only).
Option 400:
for frequencies Hz with 0 input attenuation.
for frequencies with 0 input attenuation.
The spectrum analyzer is checked for residual responses across its
frequency range with
no
signal applied to the input and 0 input
attenuation.
50 Ohm Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP
1.
2.
3.
Press
PRES
ET].
Connect CAL OUTPUT to SIGNAL INPUT 2.
Press Adjust AMPTD CAL for a MARKER amplitude
of -10.00 dbm
4.
5.
Press
PRES
ET).
Disconnect CAL OUTPUT from analyzer. Terminate SIGNAL
INPUT 2 with a 50 ohm coaxial termination.
6.
Key in control settings as follows:
7.
8.
(FREQUENCY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...50 MHz
LEVEL
]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -60
(
CENTER FREQUENCY
) .
.25
MHz
CF STEP SIZE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.45
MHz
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
Press DISPLAY LINE and key in -105
Reduce or if necessary, for a margin of at
least 4 between the noise trace and the display line (refer to
Figure 2-24). Do not reduce either bandwidth to less than 300 Hz.
Note
This test will require approximately 30 minutes to complete using
the settings given in step 6. If the resolution bandwidth or video
bandwidth are further reduced, a full band check of residual
responses will take up to 15 hours to complete
Performance Tests 2-47