578 N9030B PXA Signal Analyzer Service Guide
Functional Tests
Displayed Average Noise Level (DANL)
Displayed Average Noise Level (DANL)
Test Limits (with 0 dB input attenuation)
See
for values.
The Displayed Average Noise Level (DANL) of the signal analyzer is measured
across a 10 kHz frequency span at several center frequencies. The analyzer
input is terminated into a 50W load. A test is performed to assure the
measurement is not performed in the presence of a residual response. The
measurement is then averaged, and the result is normalized to a 1 Hz
bandwidth.
Figure 18-1
DANL Test Setup
Procedure
1.
Configure the equipment as shown in
.
2.
Press
Mode
,
Spectrum Analyzer
,
Mode Preset
on the analyzer.
3.
Set up the signal analyzer by pressing:
FREQ Channel
,
Center Freq
, 10,
MHz
Input/Output, RF Input
,
RF Coupling
, select
DC
SPAN X Scale
,
Span
, 10,
kHz
AMPTD Y Scale
, –70,
dBm
AMPTD Y Scale
, Attenuation,
MechAtten
, 0,
dB
BW
,
Res BW
, 1,
kHz
BW
,
Video BW
, 100,
Hz
Meas Setup, Average/Hold, Number
, 20,
Enter
Trace/Detector
,
Trace Average
Single
4.
Press
Restart
, then wait for Average/Hold to display 20/20.
5.
Press
View/Display
,
Display
, then press
Display Line
,
On
.
Item
Critical Specifications
(for this test)
Recommended
Keysight Model
Termination, 50W Type-N(m)
Frequency: DC to 18 GHz
909A Option 012
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