TB 9-4931-534-35
LO = (RF - IF) 2
Where:
RF = Frequency of synthesized signal generator in (2) above
IF = Intermediate frequency at which receiver system is to perform
measurement (0.700 GHz)
EXAMPLE:
Let IF = 0.700 GHz
Let RF = 18 GHz from (2) above
Let LO = signal generator frequency
LO = (RF - IF) 2
LO = (18 GHz - 0.700 GHz) 2
LO = 17.3 GHz 2
LO = 8.65 GHz
output to + 8 dBm.
(5) Establish a reference on receiver system at 0.700 GHz and press receiver system
MEAS-REF pushbutton.
(6) Disconnect fixed short from equipment setup.
(7) Connect TI to directional coupler and record receiver system readout indication
as return loss.
NOTE
Sliding terminations and mismatches only: Adjust sliding load
to phase the standard with the TI by establishing a minimum
and maximum return loss indication.
Average the two
indications and record results as TI return loss.
(8) Remove TI from directional coupler and connect fixed short to directional
coupler.
(9) Repeat technique of (5) through (8) above two times and average values recorded
in (7) above. Averaged return loss in dB will be within the limits listed in Appendix A.
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