Keysight N5224B, Руководство по обслуживанию

Страница: 169 / 614

Keysight N5224B/25B Service Guide 5-7
Theory of Operation
Network Analyzer System Operation
Synthesized Source Group
Refer to the NOTE notice on page 5-1 .
Version 6 Synthesizers and below:
The built-in synthesized source generates a swept, stepped, or continuous
wave (CW) signal in the frequency ranges as listed in the “N5224/5B Version
6 Synthesizers and Below –– (900 Hz) 10 MHz to 50 GHz -with synthesizer
revision 6 or earlier”,
1
available online at:
https://www.keysight.com/upload/cmc_upload/All/N5224B-25B_Synth6.pdf
https://www.keysight.com/upload/cmc_upload/All/N5224B-25B_Metrology
_Synth6.pdf
The source group provides five signals: an LO signal and four incident signals.
The LO signal and the four incident signals are offset in frequency by the
receiver IF. For analyzers with DSP version 4.0, the receiver IF is 7.606 MHz
(at tuned frequencies below 53 MHz the IF and the offset is 2.535 MHz). For
analyzers with DSP version 5.0, the receiver IF is 7.438 MHz (at tuned
frequencies below 53 MHz the IF and the offset is 0.826 MHz).
Version 7 Synthesizers:
The built-in direct digital synthesized (DDS) source assembly generates a
swept, stepped, or continuous wave (CW) signal in the frequency ranges as
listed in the “N5224/5B– (900 Hz) 10 MHz to 50 GHz Data Sheet and
Technical Specifications”,
2
available online at:
https://www.keysight.com/us/en/assets/9018-04171/technical-specificatio
ns/9018-04171.pdf (N5224-90003).
https://www.keysight.com/us/en/assets/9018-04179/technical-specificatio
ns/9018-04179.pdf (N5224-90004).
The source group provides five signals: an LO signal and four incident signals.
The LO signal and the four incident signals are offset in frequency by the
receiver IF. For analyzers with DDS assemblies, the receiver IF is 7.438 MHz
(at tuned frequencies below 53 MHz the IF and the offset is 0.826 MHz).
LO Behavior without LFE (Low Frequency Extension):
1. Version 6 synthesizers and below: For frequency ranges and maximum output
power levels, refer to the section “Test Port Output” in the N5224/5B– (900 Hz) 10
MHz to 50GHz Data Sheet and Technical Specifications documents (see hyper-
links above).
2. Version 7 synthesizers: For PNA frequency ranges and maximum output power lev-
els, refer to the section “Test Port Output” in the online Keysight document,
“N5224/5B– (900 Hz) 10 MHz to 50 GHz Data Sheet and Technical Specifica-
tions.” See the hyperlink above.