Keysight Technologies N9040B UXA Signal Analyzer Service Guide 157
RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
Quick Check to Verify High Band RF Path
Refer to the RF Highband Path #1 Block Diagram in
The High Band signal path (sometimes referred to as Band 1-Band 4) is used
for all signals 3.6 GHz and above. If the start frequency is set to 3.6 GHz and
above, the analyzer displays only the High Band signal path. If the analyzer
start frequency is below 3.6 GHz and the Stop frequency is set above 3.6 GHz,
the analyzer will start sweeping in Low Band up to 3.6 GHz, and then
automatically switch to the high band path above 3.6 GHz.
Equipment needed:
Spectrum Analyzer with frequency range to 14 GHz
Signal source with output power 0 dBm and frequency range to at least
26 GHz
Power splitter, 11667B
2 each, quality SMA or 3.5 mm cables
90
°
SMA (m) to SMA (f) adapter
MMCX (f) to SMA (f) cable or adapter
SMA (f) to SMA (f) adapter
SMA (m) to SMA (m) adapter
Turn the instrument on and allow it to complete its full boot up process to
Signal Analyzer mode. Use the internal 4.8 GHz,
−
28 dBm calibrator signal as a
reference for troubleshooting by pressing
Mode Preset
,
Input/Output
,
RF
Calibrator
,
4.8 GHz
on the analyzer. Now press
FREQ (Channel)
,
4.8 GHz
,
Span
,
1 MHz
,
Peak Search
.
The 4.8 GHz reference signal should measure
−
28 dBm
±
2 dB on the analyzer
display. If the power level is within tolerance, the 3.6 GHz to 13.6 GHz path is
functioning correctly at 4.8 GHz.
If the power level is incorrect, select the 50 MHz RF calibrator and set the
analyzer center frequency to 50 MHz. Since several of the same signal path
components are shared between high band and low band, determining if the
problem appears in both paths is helpful
IMPORTANT
Turn off auto align by pressing
System
,
Alignments
,
Auto Align
,
Off
.
To perform the following checks, it will be necessary to remove the outer cover, top brace, and
possibly other brackets. See
Chapter 15, “Assembly Replacement Procedures.”
for
removal procedures.
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 ...