Coupling and Directivity Tests

TB 9-5985-314-24

NOTE

Use adapters as needed.

NOTE

Use waveguide-to-coaxial adapters when TI is waveguide.

(2) Connect POINT A to POINT B (fig. 1). Press receiver system frequency to test

frequency recorded in 8 c above and establish a 0.00 dB reference.

(3) Connect TI into figure 1 equipment setup as listed in (a) through (d) below:

(a) INPUT PORT to POINT A.

(b) SIDEARM PORT to POINT B.

(d) AUX (TEST) SIDE ARM PORT (if any) to 50 : termination.

NOTE

Ensure receiver is in measurement mode.

(4) Record receiver system indication. Receiver system indication will be within the

nominal coupling value (coupling variation) + (frequency sensitivity) tolerances listed for

(5) Establish a 0.00 reference on receiver system.

(6) Connect TI into figure 1 equipment setup as listed in (a) through (d) below:

(a) OUTPUT PORT to POINT A.

(b) SIDEARM PORT to POINT B.

(d) AUX (TEST) SIDEARM PORT (if any) to 50 : termination.

NOTE

Ensure receiver system is in measurement mode.

(7) Record receiver system indication. Receiver system indication will be greater

than or equal to the value listed in TI directivity column, Appendix A.

(8) Repeat technique of (1) through (7) above for remaining test frequencies

recorded in 8 c above.

NOTE

Perform (9) through (19) below for TI test frequencies from 18

to 26.5 GHz.