TB 9-6695-273-35
7. Equipment Setup
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
b. Press microwave comb generator signal source STANDBY pushbutton to STANDBY.
c. Energize power module and allow at least 30 minutes for equipment to stabilize.
a. Performance Check
CAUTION
Do not connect 500 MHz +30 dB output directly to power
meter. Damage to power meter may result.
(1) Connect 500 MHz +30 dBm output of microwave comb generator signal source
to power meter using adapter and (30 dB) attenuator.
(2) Record value of attenuator.
(3) Press STANDBY pushbutton to ON.
(4) Measure power using power meter and record value.
(5) Add values recorded in (2) and (4) above. If sum of values is not between 28 and
32 dB, perform b below.
(6) Press STANDBY pushbutton to STANDBY.
b. Adjustments
(1) Connect spectrum analyzer to 500 MHz +30 dBm output using cable and 3 dB
attenuator (p/o TI).
(2) Adjust spectrum analyzer to display 500 MHz as center frequency.
(3) Adjust C3029 (fig. 1 for maximum signal amplitude while keeping the frequency
between 499.95 and 500.05 MHz). (R)
NOTE
C3029 is frequency and amplitude responsive.
(4) Perform adjustments in order as listed in (a) through (f) below, adjusting for
maximum amplitude on spectrum analyzer.
