APPENDIX B - TB-9-4931-523-350040

TB-9-4931-523-35 Attenuators Fixed and Variable (10 MHZ TO 40 GHZ) (General) Manual
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TB 9-4931-523-35

APPENDIX B

(1) Zero and calibrate power meter and measuring receiver RF power, then connect

equipment as shown in figure 4.

(2) Record the 10 test frequencies selected in paragraph 7a into the test frequencies

column of table B1.

(3) Adjust signal generator No. 1 frequency controls to test frequency recorded in

table B1 and adjust signal generator No. 1 RF output controls for +6 dBm.

NOTE

Use adapters as needed.

NOTE

Use waveguide to coaxial adapters when TI is waveguide.

NOTE

Use 50Ω to 75Ω or 50Ω to 93Ω adapters when TI is 75Ω or 93Ω.

(4) Press 4.0 SPCL keys and, if the AUTO TUNING indicator light is off, press the

measuring receiver FREQ and BLUE (SHIFT) AUTO TUNING keys.

NOTE

For frequencies below 1.3 GHz proceed to step (8).

NOTE

For frequencies 1.3 GHz and above, proceed to step (6) below.

For frequencies above 1.3 GHZ, the offset frequency should be

120.53 MHz above that of signal generator No. 1.

(5) Enter the test frequency into the measuring receiver and press the MHz key.

(6) Calculate and record the proper offset frequency and record it as the 'Offset

Frequency' in table B1 alongside the appropriate test frequency. Set signal generator No. 2

to produce a +8 dB output at offset frequency.

B-2

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