MM0474
AIPD SUBCOURSE NUMBER MM0474, POWER MEASUREMENTS
EXERCISES FOR LESSON 2
1.
What output operates the meter circuit of the 431C Power Meter?
A.
10 kHz bias from the oscillator amplifier
B.
DC output of the synchronous amplifier
C.
10 kHz ground signal at the RF input
2.
What position should the MOUNT RES switch on the front panel of power
meter 431C be in, when using the model 8478B thermistor mount?
A.
200 ohm Bal
B.
200 ohm
C.
100 ohm
3.
What should be done to avoid severe damage to the thermistor mount while
operating the RANGE switch?
A.
Zero adjust should not be moved
B.
Null adjust should not be moved
C.
Mount res switch should not be moved
4.
The degree of inability of the instrument to measure the true substitution
audio bias or DC power supplied to the thermistor mount is called
A.
DC-to-microwave substitution error.
B.
thermoelectric effect error.
C.
instrumentation error.
5.
When both the RF source and the thermistor mount have the same impedance
as the transmission line you have
A.
maximum transfer power.
B.
minimum transfer power.
C.
RF losses.
6.
The amount of mismatch loss in any measurement depends on the
A.
available power.
B.
conjugate power.
C.
total SWR.
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