Bb Digital Self Tests (Model N5166B, N5172B, N5182B) - Keysight Technologies X Series Service Manual

Self Test
Self Test Descriptions
603 RPP Trip Status (Model N5166B, N5171B, N5172B, N5181B,
N5182B)
This test makes sure that the RPP is not tripped. In normal operation, the RPP
should never be tripped.

700 BB Digital Self Tests (Model N5166B, N5172B, N5182B)

The BB Digital Self Tests are designed to test the digital section of the A2
Baseband Generator assembly.
701 BB Board Voltages
This test checks the voltages used for the A2 Baseband Generator assembly.
702 Interface FPGA Checks
This test checks the ability to communicate properly with the interface FPGA
on the A2 Baseband Generator assembly.
703 SPI Bus Test
This test checks the ability to communicate properly over the SPI Bus by
writing to latches on the SPI bus and reading them back.
704 Clock Checks
This test checks the frequency of the 100MHz and 200MHz clocks going to the
Interface and ARB FPGAs. The A3 RF assembly supplies a 100MHz clock which
is multiplied up by 8 to yield an 800MHz clock that feeds the IQ DAC. The IQ
DAC divides this down by 4 to yield a 200MHz clock. This 200MHz clock signal
goes through a distributor. One of the outputs goes to the ARB FPGA. Another
of the outputs gets divided down by 2 to yield a 100MHz clock. This 100MHz
clock goes through another distributor. One set of outputs goes to the
Interface FPGA. Another set goes to the ARB FPGA.
705 ARB FPGA Checks (Option 653, 655, 656, or 657)
This test checks the ability to communicate properly with the ARB FPGA on the
A2 Baseband Generator assembly.
706 Memory Test (Option 653, 655, 656, or 657)
This test checks different memory areas within the A2 Baseband Generator
assembly. The waveform memory for the I and Q data along with the marker
data is located within the DDR memory modules. The total number of memory
pages available within the instrument depends on the instrument option. For
option 023, there are 4096 total pages. Option 022 has 2048, option 021 has
1024, and standard has 128 pages.
Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 81