TB 9-4931-523-35
(7) Insert TI between POINTS A and B (fig. 3).
NOTE
Ensure receiver system is in measurement mode.
(8) Measure and record receiver indication. Measured attenuation will be within
range and accuracies specified in appendix A for TI being calibrated.
(9) Disconnect TI from equipment setup.
(10) Repeat (1) through (9) above for remaining frequencies recorded in 7a above.
b. Adjustments. No adjustments can be made; however, a correction chart may be
prepared listing actual receiver system indications at frequencies of interest.
a. Performance Check
desired measurement by calculating the following equation:
RF = Test frequency in GHz (7a above)/3
EXAMPLE A
If first test frequency recorded in 7a above is 27 GHz:
RF = 27/3
RF = 9 or 9 GHz
(2) Determine and record signal generator No. 1 frequency (LO) required for the
desired measurement by calculating the following equation:
LO - ((3 X RF) -IF) / 2
EXAMPLE B
Where:
RF
=
signal generator No. 2 frequency in GHz recorded in (1) above.
IF
=
1 (operating frequency of receiver system in GHz)
LO
=
signal generator No. 1 frequency
LO
=
((3 X 9) -1) /2
LO
=
(27 - 1) / 2
LO
=
26 /2
LO
=
13 or 13 GHz
(3) Adjust signal generator No. 2 frequency controls to value determined in (1)
above and RF output controls to +3 dBm.
(4) Adjust signal generator No. 1 frequency controls to value determined in (2)
above and RF LEVEL output controls to 0 dBm.
(5) Connect POINT A to POINT B (fig. 3)
