TB 9-4931-534-24
(12) Adjust synthesized signal generator RF output level to reference established on
receiver system in step (4) above.
(13) Repeat technique of steps (5) through (11) above 2 times and average values.
Averaged value in dB will be within the limits listed in appendix A.
listed in 7 a above and RF output level to reference established on receiver system in
step (4) above.
(15) Repeat steps (5) through (13) above for remaining frequencies recorded in
paragraph 7 a above.
b. Adjustments. No adjustments can be made; however, a correction chart may be
prepared showing actual VSWR values at test frequencies.
Insertion Loss and Isolation (Coaxial Isolators)
a. Performance Check
bridge into equipment setup. Allow equipment to warm-up 1 hour.
paragraph 7 a above with optimum RF output.
(3) Establish a reference on the receiver system at test frequency recorded in
paragraph 7 a above.
must be pointed in direction of signal flow from synthesized signal generator to
receiver system.
(5) Insertion loss in dB indications displayed on receiver system will be within
limits listed in appendix A.
(6) Reverse TI connections. TI arrow must be pointed against the signal flow from
synthesized signal generator to receiver system.
(7) Isolation in dB (minimum) indication displayed on receiver system will be within
limits listed in appendix A.
(8) Repeat steps (2) through (7) above for remaining test frequencies recorded in
paragraph 7 a above.
b. Adjustments. No adjustments can be made.
10. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
