Table 3-5 Operational Check and Troubleshooting Chart for Power Measurement Setup
Step
Procedure
Normal indication
Possible cause of malfunction
Corrective measure
1
Set POWER switch on power
LINE/CHARGE indicator lights.
Defect within power meter.
Refer to power meter manual.
meter to AC position. Allow
approx. 30 minutes for equip-
ment to warm up and stabilize.
2
Adjust ZERO control for 25 to
Meter indication is adjustable to
Defect within power meter.
Refer to power meter manual.
75% of full scale deflection
25 to 75% of full scale.
on meter.
3
Set Range switch to NULL po-
Meter indication is within NULL
Defect within power meter.
Refer to power meter manual.
sition and adjust NULL
region.
screwdriver adjustment for a
minimum indication on meter.
Defective thermistor or intercon-
Replace thermistor or intercon-
Repeat 2 above and 3 until
necting cable.
necting cable.
meter indication is within
NULL region.
4
Set RANGE switch to a position
Meter indicates zero (O MW)
Defect within power meter.
Refer to power meter manual.
that will produce a near mid-
scale deflection, when rf power
Defective thermistor or intercon-
Replace thermistor or intercon-
is applied. Zero-set meter with
necting cable.
necting cable.
ZERO and VERNIER con-
trols.
5
Apply rf power to thermistor
Meter indicates output power of
Defect within power meter.
Refer to power meter manual.
mount by either turning on rf
unknown rf source.
source or by removing level-set
Defective thermistor mount.
Replace thermistor mount.
attenuator.
Poor or improper connection within
Locate and correct poor or im-
test setup.
proper connection in test set-
up.
Table 3-6. Operational Check and Troubleshooting Chart of Reflection Coefficient Measurement Setups in Frequency Ranges from 1 to
2 GHz and 12.4 to 40 GHz
Step
Procedure
Normal indication
Possible cause of malfunction
Corrective measure
I
Turn POWER switch on SWR
LINE/CHARGE indicator lights.
Defect within SWR meter.
Refer to SWR meter manual.
meter to LINE ON.
2
Operate signal source in leveled
SWR meter indicates a deflection.
Defect within SWR meter.
Refer to SWR meter manual.
CW mode of operation. Place
SQUARE WAVE SELECTOR
Defect within signal source.
Refer to paragraph 3-13 of this
SWITCH on BWO power sup-
section.
ply to ON position. Allow ap-
prox. 30 minutes for equip-
Poor connection in test setup.
Locate and correct poor con
ment to warm up and stabilize. I
nection in test setup.
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