166 Keysight Technologies N9040B UXA Signal Analyzer Service Guide
RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
High Band Mixing Equations
For input signal frequencies from 3.6 GHz to 8.4 GHz
and 13.6 GHz to 17 GHz:
RF = LO x N
−
IF
IF = LO x N
−
RF
LO x N = IF + RF
where RF is the input signal at the signal analyzer
where N is the harmonic mixing mode:
N = 1 for 3.5 GHz to 8.4 GHz
N = 2 for 13.5 GHz to 17 GHz
For input signal frequencies above 8.4 GHz to 13.6 GHz
and 17 GHz to 26.5 GHz:
RF = LO x 2 x N
−
IF
IF = LO x 2 x N
−
RF
LO x 2 x N = RF
+
IF
where RF is the input signal at the signal analyzer
where N is the harmonic mixing mode:
N = 1 for 8.4 GHz to 13.6 GHz
N = 2 for 17 GHz to 26.5 GHz
Low Noise Path (Option LNP)
Allows the Lowband Switch assembly to be bypassed, improving sensitivity in
high band path.
Press
AMPTD Y Scale
. Tap
Signal Path
,
uW Path Control
,
Low Noise Path
Enable
key. The Low Noise Path will be enabled only after the following
conditions are met:
1.
The start frequency must be 3.6 GHz or greater.
2.
The high band preamp (Option P08, P18, P26) must be Off.
When Switch 3 changes state, you will hear a click. The amplitude of the
displayed signal should not change.
Microwave Preselector Bypass (Option MPB)
Allows the YTF to be bypassed improving amplitude accuracy.
Assure start frequency is 3.6 GHz or greater. Press
AMPTD Y Scale
. Tap
Signal
Path
,
uW Path Control
,
uW Preselector Bypass
.
When the bypass switches Switch 1 and Switch 2 change state you will hear a
click. Depending on the signal source connected, you may see many “signals”
appear on screen because without preselection, the analyzer will display
images and multiples. The real input signal should not change amplitude when
you switch the uW Preselector Bypass on and off.
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 ...