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14. Residual Responses
Test
14. Residual
Responses Test
Specification
Description
Equipment
Procedure
c-105
dBm for frequencies >500 Hz with 0 dB input attenuation (no
signal present at input) Option 100:
c-99
dBm for frequencies >500 Hz with 0
dB
input attenuation
(SIGNAL INPUT 1 only).
Option 400:
c-95
dBm for frequencies >500 Hz with 0
dB
input attenuation.
c-105
dBm for frequencies
>2.5
kHz with 0 dB input attenuation.
The spectrum analyzer is checked for residual responses across its
frequency range with
no signal applied to the input and 0
dB
input
attenuation.
50 Ohm Termination
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP
11593A
1.
2.
3.
Press (INSTR PRESET].
Connect CAL OUTPUT to SIGNAL INPUT 2.
Press
IRECALL)
@J
Adjust AMPTD CAL for a MARKER amplitude
of -10.00 dbm
f0.02
dB.
4.
5.
Press
QNSTR
PRESET).
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
CREFERENCE
LEVEL] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -60 dBm
(CENTER FREQUENCY) .
.25
MHz
CF STEP SIZE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.45
MHz
km,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
(@EGG-)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 kHz
(ATTEN)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
dB
Press DISPLAY LINE
CENTER_)
and key in -105 dBm.
Reduce
[RESBW)
or
[VlDEOBW),
if necessary, for a margin of at
least 4
dB
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