
V. VERIFY GEftTNOTE ^ I MHz V Range: +/- 2 V.
1 1729C
uTEGT EN I,F, OUT
USER'S DUT
FN 1M RF OUT
86G2R
RF OUT •
Press 'Proceed' uhen ready.
a
35G1R
9
«
R
D
o m
\n\
0
a
3585F1
Figure 6-16. Tuning the DUT Connect Diagram
Tuning the down converter reference (HP 11729C 640 MHz input) will also
tune the Carrier Frequency. You must scale the Tuning Constant directly
to the Carrier Frequency The HP 11729C, when used with the HP 8662A
with EFC control to measure a 10 GHz source, will tune the comb line
about ±500 Hz.
10 GHz 0.05 Hz ^
Mr
500 Hz
- x ——— x 10V =
where
10 MHz
10 GHz
10 MHz
0.05 Hz
V
V V
= Ratio of Carrier Frequency to Time Base
= Estimated Tuning Constant of Time Base
10V = VoltageTuningRange
500 Hz
V
= PeakTuningRange
6-38 Down Converters
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