3-8. Operational Check and Troubleshooting
3-9. Operational Check and Troubleshooting
of Power Measurement Setup
a. Preliminary Procedure.
Measurement Setups in the Frequency
(1) Select appropriate thermistor mount for
Ranges from 1 to 2 GHz and 12.4 to 40
frequency at which rf power is to be measured.
GHz.
(2) Set up equipment as shown in the figure
a. Preliminary Procedures. Set up equipment as
illustrating setups for rf power measurements in chapter
shown in the appropriate figure illustrating setup for
2, section III, of TM
9-4931-294-15/1.
reflection coefficient measurement between 1 and 2 GHz
(3) Set MOUNT RES switch on power meter as
or between 12.4 and 40 GHz in chapter 2, section III, of
indicated below:
TM 9-4931-294-15/1.
(a) To 200 n position when using thermistor
b. Operational Check and Troubleshooting Chart.
mounts 7910459, 7910461, or 7910710.
After performing preliminary procedure described in a
(b) To 100 n position when using thermistor
above, proceed with the steps of table 3-6. For complete
mounts 7910460 or 7901709.
operational procedures, refer to the paragraph on
(4) Set RANGE switch to .01 MW position.
reflection coefficient measurement in the frequency
(5) Turn off rf source. If rf source cannot be turned
ranges from 1 to 2 GHz and 12.4 to 40 GHz in chapter 2,
off, turn rf output control to minimum output and connect
section III, of TM 9-4931-294-15/1.
a level-set attenuator having at least 15 db attenuation to
the output connector. Set attenuator for maximum
3-10. Operational Check and Troubleshoot- ing of
Magnitude of Reflection Co-efficient Measurement
Setups in the Frequency Range from 2 to 12.4 GHz.
factor as indicated on the thermistor mount calibration
a. Preliminary Procedures. Set up the equipment
chart.
as shown in the appropriate figure illustrating setup for
b. Operational Check and Troubleshooting Chart.
reflection coefficient measurement between 2 and 12.4
After performing preliminary procedure described in a
GHz in chapter 2, section III, of TM 9-4931-294-15/1.
above, proceed with the steps of table 3-5. For complete
Select the appropriate setup in accordance with the
operational procedures, refer to the paragraph on rf
frequency at which measurement is to be performed.
power measurement in chapter 2, section III, of TM 9-
b. Operational Check and Troubleshooting Chart.
4931-294-15/1.
After performing preliminary procedure described in a
above, proceed with the steps of table 3-7. For complete
operational procedures, refer to the paragraph on
reflection coefficient measurement in the frequency
range from 2 to 12.4 GHz in chapter 2, section III, of TM
9-4931-294-15/1.
3.11