TB 9-6625-1932-35
EXAMPLE A: If first test frequency recorded in (48) above is 27 GHz:
RF = 27 / 3
RF =9 or 9 GHz
(50) Determine and record the programmable sweep generator frequency (LO)
required for the desired measurement by calculating the following equation:
LO = ((3 X RF)-IF) / 2
EXAMPLE B:
Where:
RF =
Signal generator frequency in GHz recorded in (49) above.
IF =
1 (operating frequency of receiver system in GHz)
LO =
Programmable sweep generator frequency
LO =
((3 X 9) -1) / 2
LO =
(27 - 1) / 2
LO =
26 / 2
LO =
13 or 13 GHz
above and RF output controls for +3 dBm.
in (50) above and LEVEL output controls for +3 dBm.
(53) Establish a 0.00 dB reference on receiver system at 1 GHz.
NOTE
Ensure receiver system is in measurement mode.
(54) Disconnect fixed short from directional coupler No. 4 (fig. 6).
(55) Zero power meter No. 1 and connect TI to directional coupler No. 4, point A (fig.
(56) Remove TI from directional coupler No. 4 and connect fixed short to directional
coupler No. 4, point A (fig. 6).
(57) Repeat technique of (53) through (56) above two more times and average values
recorded in (55) above. Determine VSWR using appendix B. VSWR will be within the
limits listed in appendix A.
(58) Repeat (49) through (58) for remaining cardinal test point frequencies recorded
in (48) above.
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