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E5505a_PTR_reqd_inj_lock
25 Mar 04 rev 1
Figure 82 Phase lock loop bandwidth provided by the peak tuning range
1
2
If you are not able to tune the beatnote to 2 X PLL bandwidth (center of display) due to
NO T E
frequency drift, refer to Tracking Frequency Drift in this section for information about
measuring drifting signals. If you are able to locate the beatnote, but it distorts and then
disappears as you adjust it towards 0 Hz, then your sources are injection locking to each
other. Set the beatnote to the lowest frequency possible before injection locking occurs and
then refer
3
Agilent E5505A User's Guide
1M
100k
10k
1k
100
10
1
.1
1
10
Once the beatnote is displayed;
a
press the press [[RANGE]]
press [[AUTO RANGE OFF]]
b
and press [[SINGLE AUTO RANGE]] on the RF analyzer
c
Set the span width on the RF analyzer to approximately 4 x PLL bandwidth.
Adjust the BITNET to position it near the center of the display.
to"Minimizing Injection Locking"
Press the [[AVG]] key, and then the RMS key.
a
Wait for the trace to return and then press;
b
[[MKR]] and MKR to Peak.
Press [[REL MKR]], and MKR REF.
Absolute Measurement Fundamentals
100
1k
10k 100k 1M
Peak tuning range (Hz)
on page 120 for recommended actions.
10M 100M 1G
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125
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