Synthesized Lo Group Operation (Option 108); Basic Operation - Keysight N5264A Service Manual

Theory of Operation

Synthesized LO Group Operation (Option 108)

Synthesized LO Group Operation (Option 108)
The LO group produces a stable LO output signal by phase locking a
synthesized voltage-controlled oscillator (VCO). Refer to
page 5-6
panel test ports are swept, stepped or CW signals. Maximum leveled output
powers are listed in
source group, refer to
In this section the following are described:
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Basic Operation

Table 5-2 on page 5-6
HMA26.5 output frequency for each band. This table is referred to throughout
this chapter and also appears on the overall block diagram at the end of
Chapter 4, "Troubleshooting."
The A10 frequency reference board produces a constant phase locked
reference signal of 50 MHz that is sent to the A11 13.5 GHz LO synthesizer
board.
The A11 13.5 GHz synthesizer board produces an LO signal that is sent through
the A21 multiplier/amplifier 26.5 (HMA26.5) to the rear panel LO OUT
connector.
5-4
for the full frequency range of the source. The outputs at the front
Table 5-2 on page
Figure 5-2 on page
Basic Operation
A10 Frequency Reference Board
A11 13.5 GHz LO Synthesizer Board (Option 108)
A21 Multiplier/Amplifier 26.5 Board (HMA26.5) (Option 108)
A19 Test Set Motherboard
lists the A11 LO synthesizer frequency and the A21
5-6. For a simple block diagram of the
5-5.
(including rear-panel interconnects)
(including rear-panel interconnects)
Keysight N5264A Service Guide
Table 5-2 on