Frequency Accuracy; Test Description; Test Specification - Keysight NFA Series Performance Verification And Calibration Manual

Frequency range 10
MHz to 3 GHz
Frequency range 3
GHz to 26.5 GHz
χ
is equal to the tuned frequency * (1 ± frequency standard in use).
NOTE
Test Descriptions

Frequency Accuracy

Frequency Accuracy

Test Description

The NFA filter shape is asymmetrical. The center frequency is defined at
the half power level under the curve. The frequency accuracy tests are
performed by measuring selected P
The half power value of the P
frequency which closest matches this value is given as the center
frequency point.
For test purposes the narrow bandwidths are verified at the narrowest
bandwidth of 100 kHz. This is due to the fact that the NFA uses digital
sample processing (DSP). It is therefore only necessary to verify the
narrowest bandwidth with the most accurate specification. Model
N8972A does not support narrow bandwidth functionality.

Test Specification

4 MHz 2 MHz
±100 KHz ±20 KHz
χ χ
+ +
4 MHz 2 MHz
±400 KHz ±400 KHz
χ χ
+ +
On the N8972A model only a DSP bandwidth of 4 MHz is available.
38
points along the filter curvature.
hot
measurements is then calculated. The
hot
B a n d w i d t h
1 MHz 400 KHz
±20 KHz ±20 KHz
χ χ
+ +
1 MHz 400 KHz
±200 KHz ±80 KHz
χ χ
+ +
200 KHz 100 KHz
±20 KHz ±20 KHz
χ χ
+ +
200 KHz 100 KHz
±40 KHz ±20 KHz
χ χ
+ +
Chapter 2