Keysight Technologies N9040B UXA Signal Analyzer Service Guide 509
Functional Tests
Displayed Average Noise Level (DANL)
4.
Press
Restart
, then wait for Average/Hold to display 20/20.
5.
Press
Display
, then press
Display Line
,
On
.
6.
Rotate the knob and set the display line at the average amplitude of the
displayed noise floor by visual inspection.
7.
Confirm that the measurement is performed on the analyzer noise floor
and not on a residual response within the displayed 10 kHz span.
8.
Enter the value of the display line as the Measured Average Noise Level at
10 MHz column in
9.
Normalize the measured value to a 1 Hz BW by adding –30 dB to the
measured value.
10.
Enter the normalized value of the displayed average noise level in.
11.
The value of the normalized displayed average noise should be less than
the specification value.
12.
Change the analyzer center frequency to the next value listed in
. Press:
FREQ Channel
,
Center Freq
, [Table 2-1 Value],
GHz
Ignore the residual response if one appears when taking the measurement.
The –30 dB value is added because the formula used to calculate the value of the noise power in
a 1 Hz BW when measured with a 1 kHz BW is:
Normalized Noise = 10 Log (BW 2/BW 1) where BW 2 is the 1 kHz BW we
measure and BW 1 is 1 Hz BW to which we want to normalize.
Therefore, 10 Log (1000) = 30 dB, so the noise floor will be 30 dB lower in
a 1 Hz BW.
Содержание N9040B Option 513
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Страница 138: ...138 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Instrument Messages Condition Messages ...
Страница 240: ...240 Chapter 11 Hardware Options A21 Wideband Analog IF Troubleshooting Figure 11 1 Analog IF Block Diagram ...
Страница 256: ...256 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Block Diagrams Block Diagrams Block Diagrams ...
Страница 306: ...306 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts Figure 14 2 External Hardware ...
Страница 338: ...338 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts Figure 14 28 Chassis ...
Страница 346: ...346 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts ...
Страница 502: ...502 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Post Repair Procedures ...
Страница 532: ...532 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Functional Tests Scale Fidelity ...
Страница 536: ...536 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Instrument Software Software Updates ...
Страница 541: ...Index Index 541 Y yellow LED 48 51 yig filter see A12 YTF YTF see A12 YTF ...