Keysight Technologies E4417A Service Manual page 43

2 Performance Tests
– Test line limit: 0.1%.
– System uncertainty: 0.3%.
– 2 year oscillator drift: 0.04%.
– Delta environment: <0.06%.
The same equipment used to measure the accuracy of the power reference
oscillator can also be used to set it to the post-factory accuracy of ±0.4% (for
further information refer to
The following procedure ensures maximum accuracy in measuring power
reference oscillator output using Keysight 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 test is performed using Equation 2-4:
Equation 2-4: Power Level Provided By The Reference Oscillator
P meas
The components of this equation are defined as follows:
– V
– V
– V
– R is the resistance of the mount resistor in the Keysight 432A power meter. For
– Calibration Factor is the value of the thermistor mount at 50 MHz.
48
2V comp V 1 V 0
(
= - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4R CalibrationFactor
(
is the voltage measured between V
0
after the Keysight 432A has been zeroed.
is the voltage measured between V
1
power is approximately 1 mW.
is the voltage between the Keysight 432A V
comp
ground with power applied.
further information refer to
Chapter 3, "Adjustments").
2 2
+ V 0 V 1
)
– –
)
and V
comp
and V
comp
Appendix A.
Keysight E4416A/E4417A Power Meters Service Guide
with no power applied and
RF
with power applied. This
RF
connector and chassis
comp