MM0474
AIPD SUBCOURSE MM0474, POWER MEASUREMENT
EXERCISES FOR LESSON NUMBER 4
1.
What is the purpose of NBS Type II Power Measuring System?
a.
Measure low frequency power
b.
Measure high frequency power
c.
Calibrates power meters
2.
The frequency and power range covered using the Type II Power Measuring
System depends upon
a.
The bolometer used
b.
Output voltage
c.
The external voltmeter used
3.
When the reference generator is operating in the RVG mode, the output
voltage meter displays
a.
The output of the null detector amplifier
b.
The setting of the decade divider dials
c.
The output of the leveling amplifier
4.
In addition to determining a bolometer's operating resistance for use with
the Type II Power Measurement System, what other factor should be
determined?
a.
Operating voltage
b.
Power level
c.
Whether it is a barretter or thermistor
5.
Before the bolometer mount is connected to the bridge on the power
measurement system
a.
With power off, set the BARR-THER switch
b.
Turn power on and let the instrument stabilize
c.
Disconnect the rear grounding link
6.
A precision power measurement using the power measurement system requires
an external
a.
Precision voltage source
b.
c.
Current meter
7.
In the measurement procedure of the power measurement system, drift in the
null is caused by
a.
A thermal drift of the bolometer element
b.
A drift of the RF power source
c.
Sensitivity of divider dial
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