TB 9-4931-523-24
NOTE
Ensure measuring receiver measurement accuracy is set to high.
7 a above and adjust output for 0.0 dBm.
(2) Configure measuring receiver for tuned RF Level measurements and manually
enter carrier frequency into measuring receiver. Record reading as reference.
(3) Adjust signal generator output in 10 dBm steps to -70 dBm.
Allow the
measuring receiver to acquire the signal at each level.
NOTE
Use adapters as needed.
NOTE
Use 50 Ω to 75 Ω or 50 Ω to 93 Ω adapters when TI is 75 Ω or 93 Ω.
(4) Adjust signal generator output for 0.0 dBm indication on measuring receiver.
(5) Configure measuring receiver in the ratio mode.
(6) Connect the attenuator at the TI INSERTION POINT as shown in figure 1.
(7) Measure and record measuring receiver indication as insertion loss. Measured
attenuation will be within range and accuracies specified in appendix A, insertion loss
column, for TI being calibrated.
(8) Increase TI attenuation setting in one step increments (or one cardinal
point as desired.)
(9) Measure and record measuring receiver indication. Measured attenuation will
be within range and accuracies specified in appendix A for TI being calibrated.
(10)Repeat steps (1) 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 listing actual measuring receiver indications at frequencies of interest.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25. For models with