Figure 3-3 Adjustment Setup - Agilent Technologies E4416A Service Manual

3 Adjustments
To ensure maximum accuracy in re-adjusting the power reference oscillator output, this
N O TE
procedure provides step-by-step instructions for using Agilent test instruments of
known capability. Signal acquisition criteria may vary if alternative test instruments are
used. In such cases refer to the manufacturer's guidelines for further information.
The power meter may be returned to the nearest Agilent Technologies office to have
N O TE
the power reference oscillator checked and/or adjusted.
Power Meter
Power ref
Thermistor
mount
A d j u s t m e n t S e t u p
F i g u r e 3 - 3
For this adjustment the following mathematical assumptions are made:
Equation 1:
P
meas
can be manipulated to give the following:
Equation 2:
V =
1
66
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Agilent 432A
Power Meter
V
RF
V
comp
2
( )
2V V – V + V
comp 1 0 0
= -------------------------------------------------------------------
(
4R CalibrationFactor
2
(
V
V + V – –
comp
comp 0
Digital Voltmeter
2
– V
1
)
– 3
) ( ) CalibrationFactor (
10 4R
E4416A/E4417A Power Meters Service Guide
+ input
− input
)