Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 87
Self Test
Self Test Descriptions
1304 MW Mod Filter RF Paths
This test checks the filter paths through the A7A3 Mod Filter assembly. Various
frequencies within a band, typically at each end and in the middle, are checked
against known input levels. Discrepancies with filter paths are verified through
absolute and delta voltage measurements.
1400 MW 40GHz Doubler Self Tests (Model N5173B, N5183B with
Option 532 or 540)
The 40 GHz Doubler Self Tests are designed to test the operation of the A7A4
40 GHz Doubler assembly. This assembly is responsible for taking the 10-20
GHz RF output from the A7A3 20 Frequency Multiplier assembly and
translating this to 20-40 GHz. The A7A4 40 GHz Doubler assembly consists of
a biased multiplier, as well as several switchable bandpass filters. In addition,
there is an output amplifier followed by a low-pass filter.
1401 MW 40GHz Doubler Bias Board Voltages
This test checks the power supply voltages used by the A7A4 40 GHz Doubler
assembly.
1402 MW 40GHz Doubler RF Paths
This test checks the filter paths through the A7A4 40 GHz Doubler assembly.
Various frequencies within a band, typically at each end and in the middle, are
checked against known input levels. Discrepancies with filter paths are verified
through absolute and delta voltage measurements.
1500 RT Board Self Tests (Option 660)
The RT Board Self Tests are designed to test the A7 Real Time Baseband
Generator assembly.
1501 PCIe
This test checks the PCIe communication to the A7 Real Time Baseband
Generator assembly. This is accomplished by writing to a test register within
the PCIe bridge to the assembly.
1502 RT FPGA
This test checks that we are able to program and communicate to the interface
and apps FPGAs on the A7 Real Time Baseband Generator assembly.
1503 RT FPGA Alignment
This test checks that the serdes signals between the interface and apps FPGAs
on the assembly can be aligned.
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