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  TM 11-6625-3060-10
PRINCIPLES OF OPERATION
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ZERO Control
The ZERO control sets the sensitivity of the rf millivoltmeter. Since the rf millivoltmeter range is 200 uv to 3.0 volts the
ZERO control is adjusted at the FULL SCALE mV 1 range which is the lowest and most sensitive range (200 uv to slightly
more than 1 mV). ZERO adjustment is not needed on the 30 mV to 3000 mV ranges.
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FULL SCALE mV Pushbutton Swithes
The FULL SCALE 1, 3, 10, 30,100, 300, 1000, and 3000 mV pushbutton switches select the respective full scale reading
that the rf millivoltmeter will display. For example,on the 1 mV scale the amplitude of the signal under test (RF PROBE
signal) will be displayed if it is between approximately 200 uV and 1.20 mV. Above or below this amplitude the digital
display will go out (blanK). On the 30 mV range the signal under test (RF PROBE signal) will be displayed if it is between
approximately 24.0 and 31.5 mV. The millivoltmeter display blanks when the RF PROBE signal is approximately 5% above
or 20% below the full scale rf millivoltmeter display range selected.
1-8
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