Filter
Top Products
13. Average Noise Level Test
13. Average Noise
Level
Tkst
Specification
Description
Equipment
Procedure
c-135
dBm for frequencies
>I
MHz,
c-112
dBm for frequencies
<l
MHz but >500 Hz with 10 Hz resolution bandwidth, 0
dB
input
attenuation, 1 Hz video filter.
Option 001:
c-129
dBm for frequencies
>l
MHz,
c-106
dBm for
frequencies 51 MHz but >500 Hz with 10 Hz resolution bandwidth, 0
dB
input attenuation, 1 Hz video filter (SIGNAL INPUT 1 only).
The average noise level is checked by observing the displayed noise
level at several frequencies with no input signal applied.
50 Ohm Termination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HP
11593A
1.
2.
3.
Press
(~NsTR
PRESET].
Connect CAL OUTPUT to SIGNAL INPUT 2.
Press
m
@.
Adjust AMPTD CAL for a MARKER amplitude
of -10.00 dBm
50.02
dB.
4.
5.
Press ~NSTR PRESET].
Disconnect CAL OUTPUT from analyzer. Terminate SIGNAL
INPUT 2 with a 509 coaxial termination.
6.
Key in spectrum analyzer settings as follows:
CATTEN)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
dB
(CENTER FREQUENCY] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501 HZ
FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .O Hz
;W,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Hz
REFERENCE LEVEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -80 dBm
i-1
. . . .
..__............__..............................
1Hz
@WEEP TIME] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.20
seconds
7.
8.
Press SWEEP
(SINGLE]
and wait for completion of the sweep.
Press DISPLAY LINE
[ENTER).
Using DATA knob, place display
line at the apparent average amplitude of the noise trace (see
Figure 2-23).
Performance Tests 2-45