TB 9-4931-534-35
(10) Repeat (2) through (9) above for remaining test frequencies recorded in 7 a
above.
b. Adjustments. No adjustments can be made; however, a correction chart may be
prepared showing actual VSWR values at test frequency.
11. VSWR,
Waveguide Mismatches, and
Terminations (26.5 to 40 GHz)
a. Performance Check
(1) Connect equipment as shown in figure 4 and allow equipment to warm up for 1
hour.
(2) Refer to test frequencies determined in 7 a above. Record these values here.
desired measurement by calculating the following equation:
RF = test frequency in GHz form (2) above 3
EXAMPLE A: If first test frequency recorded in (2) above is 27 GHz:
27 3
RF
=
RF
=
9 or 9 GHz
required for desired measurement by calculating the following equation:
LO = [(3 x RF) - IF] 2
EXAMPLE B:
Where: RF = signal generator frequency in GHz recorded in
(3) above.
IF
=
1 (operating frequency of receiver system in GHz)
LO
=
synthesized signal generator frequency
[(3 x 9) - 1] 2
LO
=
(27-1) 2
LO
=
26 2
LO
=
LO
=
13 or 13 GHz