15. Residual Responses Test
100 Hz to 5.8
5.8
to 12.5
12.5
to 18.6
18.6
to 22
The spectrum analyzer is tested for residual responses across its
frequency range with no signal applied and 0
input attenuation.
50 Ohm Coaxial Termination . . . . . . . . . . . . . . . . . . HP
Option 012
1.
2.
3.
Press
Connect CAL OUTPUT to RF INPUT. Press (RECALL)
Adjust AMPTD CAL for a MARKER amplitude of -10.00
4. Press
Disconnect CAL OUTPUT and terminate RF
INPUT with a 50 ohm coaxial termination.
5. Key in the following:
6.
REFERENCE LEVEL
]
. . . . . . . . . . . . . . . . . . . -20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
. . . . . . . . . . . . . . . . . . . . . . . . 30
(VIDEO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . 1.5
Press DISPLAY LINE
and key in -100
There should be at least 3
margin between the noise trace and
the display line so that any residual responses may be distinguished
from the noise. It may be necessary to reduce the resolution or video
bandwidths from the settings given in this procedure to achieve this
margin. If this causes the
UNCAL message to appear, it will be
necessary to reduce the frequency span and use more sweeps to cover
the frequency range.
7. Press TRACE A
(
CLEAR
-
WRITE
),
SWEEP
Wait for
completion of the sweep. (See Figure 2-27.)
Performance Tests 2-61
