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Alternate Calibration Process for VSWR Bridges (10 MHz to 18 GHz)
Table F2. Return Loss Measurements (with N-Short)

Calibration Procedure For Directional Couplers, Vswr Bridges, Coaxial Circulators, Power Splitters, And Power Dividers (10 Mhz To 40 Ghz) (General) Page Navigation
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TB 9-5985-314-24
(15) Set signal generator No. 1 to the level calculated in (14) above and press the
CALIBRATE key.
(16) Set signal generator No. 1 to the initial level of +6 dBm.
(17) Press 38.2 and SPCL keys and record the displayed value as First RF cal fac in
table F1 alongside the appropriate test frequency.
(18) Press 38.3 and SPCL keys and record the displayed value as Second RF cal fac
in table F1 alongside the appropriate test frequency.
(19) Press 38.4 and SPCL keys and record the displayed value as Set RF cal fac in
table F1 alongside the appropriate test frequency.
(20) Repeat steps (3) through (19) for each of the test frequencies in table F1.
(21) Press the FREQ and BLUE (SHIFT) AUTO TUNING keys.
(22) Set signal generator No. 1 to appropriate test frequency listed in table F1.
(23) Press the GOLD(S) TUNED RF LEVEL, 26.1 and SPCL keys.
NOTE
For frequencies below 1.3 GHz proceed to step (26) below.
(24) Press 27.3 SPCL, enter the appropriate offset frequency from table F1, and
press the MHz key. (Ignore the displayed frequency reading.)
(25) Set signal generator No. 2 for an output of +8 dBm and the appropriate offset
frequency from table F1.
(26) Remove N-short from TI.
(27) Connect mismatch as listed in table F2 to TI DEVICE UNDER TEST port.
(28) Adjust signal generator No. 1 for a power meter indication as recorded in table
F1 as Power meter reading.
(29) Press 39.2 SPCL and enter the First RF cal fac from table F1 for the
appropriate frequency, and press the BLUE (SHIFT) % CAL FACTOR (MHz) keys.
(30) Press 39.3 SPCL and enter the Second RF cal fac from table F1 for the
appropriate frequency, and press the BLUE (SHIFT) % CAL FACTOR (MHz) keys.
(31) Press 39.4 SPCL, enter the Set Ref cal fac from table F1 for the appropriate
frequency, and press the BLUE (SHIFT) % CAL FACTOR (MHz) keys.
(32) Record measuring receiver indication in table F2.
F-3


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