Keysight N5227B Service Guide 5-15
Theory of Operation
Synthesized Source Group Operation
produce a 7.438 MHz IF signal for each of eight receivers (A–D and R1–R4).
Refer to
“A27 and A28 Mixer Bricks” on page 5-37
for a more complete
description.
A5 and A10 26.5 GHz Source Boards
In bands 2–9, the A5 and A10 26.5 GHz source boards input signals from the
A4 or A17 13.5 GHz synthesizer board are passed through to both outputs
(main and secondary) unchanged.
For bands 10-15, 19-23, and 29-31, the input signals are passed directly to the
secondary output or amplified and filtered, then sent to the main output.
For bands 16-18, 24-28, and 32-35, the input signals are doubled, filtered, and
amplified. The signals for these bands are then either passed directly to the
secondary output or passed through more amplification and filtering and sent
to the main output.
A7, A8, A12, and A13 50 GHz Doubler Boards
The A12 and A13 50 GHz doubler boards are included only on 4-port models.
Refer to
for band numbers and frequencies discussed
here.
For bands 2–15, the lowband input ports of the A7, A8, A12, and A13 50 GHz
doubler boards receive their signals from the A5 and A10 source module OUT 1
and OUT 2 outputs. These signals are passed through to the doubler board
output unchanged.
For bands 16–18, the highband input ports of the A7 and A12 50 GHz doubler
boards receive their signals from the A5 and A10 source module P4 outputs.
These signals are amplified by the A7 and A12 doubler boards and output via
the highband output ports to the highband input ports on the A8 and A13
doubler boards.
For bands 16–18, the input signals of all four doubler boards are amplified and
filtered, then sent to the doubler board output.
For bands 19–35, the input signals of all four doubler boards are doubled,
amplified and filtered, then sent to the doubler board output.
Doubler board output signals for bands 2–35 create the full synthesized source
output frequency range of 10 MHz to 40 GHz.
The A7 50 GHz doubler board provides an EXT TSET DRIVE RF1 OUT signal to
the rear panel. This signal is output at a frequency range of 3.2–19 GHz for use
with an external test set. This output is terminated with a 50-ohm load on the
A8, A12, and A13 doubler boards.
The companion signal, EXT TEST SET DRIVE LO, is output from the A27 mixer
“A27 and A28 Mixer Bricks” on page 5-37
.
Содержание N5227B
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