Figure 2-3 Test Setup With Attenuator Connected - Agilent Technologies E4416A Service Manual

Power Meter
Power ref
Attenuator
CHANNEL A
Power sensor cable

Figure 2-3 Test Setup With Attenuator Connected

12 Take a measurement:
Wait 30 seconds to allow the power level to settle, then press
the power meter.
13 Record the values displayed on both the power meter and DVM displays.
Note down the values in
These values tend to drift. They must therefore be recorded simultaneously or with as
N O TE
small a delay as possible between them.
14 Repeat step 13 a further 49 times to obtain a set of 50 pairs of measured
values.
15 Calculate the measurement error for each pair of measured values using the
following equation:
x =
Note down each x value in the Error Value (x) column of
16 Calculate the linear standard deviation of the data using
Standard
error values (listed in the Error Value (x) column of
E4416A/E4417A Power Meters Service Guide
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Power Sensor
Power sensor cable
Breakout box
red
black
Table 2-
(
⎛ DVMValue PowerMeterValue –
---------------------------------------------------------------------------------------- -
⎝
DVMValue
Deviation, where n = number of samples (50) and x = calculated
Performance Tests
Digital Voltmeter
2.
)
⎞
×
100 %
⎠
Table 2-
Equation 2- 1:
Table 2-
2
+ input
− input
on
Measure
2.
2)
25