Keysight Technologies N9040B UXA Signal Analyzer Service Guide 197
Analog/Digital IF Troubleshooting
A3 Digital IF Assembly Description
A3 Digital IF Assembly Description
The A3 Digital I.F. has circuitry that is needed to analyze complex
communication signals that can occupy up to 40 MHz of information
bandwidth. This assembly has two inputs:
1.
The final 22.5 MHz I.F. from the A2 Analog I.F. for IF bandwidth paths up
to 25 MHz wide. This input is used for swept and FFT spectrum analysis.
2.
The 250 MHz IF from the A15 Front End Control Assembly for IF
bandwidth of 40 MHz.
Each input has a separate ADC that processes the time domain continuous
data into I/Q (in-phase and quadrature) signals before sending the data to the
A4 CPU assembly for further processing and front panel display.
The Digital I.F. has the following main functions:
— Digitizes the 22.5 MHz and the 250 MHz IF signals
— 16 bit ADC with a 100 MHz sample rate to digitize the 22.5 MHz IF
— 12 bit ADC with a 200 MHz sample rate to digitize the 250 MHz IF
— DSP for standard spectrum analysis
— Capture memory for complex signals
— Noise Source Control
— Dither for final I.F
— Provides the alignment sequence generator for wide band alignments
— Provides wide band Comb Calibration Signal
— Trigger interpolation and associated alignment
Содержание N9040B Option 513
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Страница 240: ...240 Chapter 11 Hardware Options A21 Wideband Analog IF Troubleshooting Figure 11 1 Analog IF Block Diagram ...
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Страница 541: ...Index Index 541 Y yellow LED 48 51 yig filter see A12 YTF YTF see A12 YTF ...