Frequency Accuracy; Test Description; Test Specification - Agilent Technologies 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).
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
hot
P measurements is then calculated. The frequency which closest matches this
hot
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.

Test Specification

4 MHz 2 MHz
±100 KHz ±20 KHz
χ χ
+ +
4 MHz 2 MHz
±400 KHz ±400 KHz
χ χ
+ +
38
points along the filter curvature. The half power value of the
B a n d w i d t h
1 MHz 400 KHz
±20 KHz ±20 KHz
χ
+ +
1 MHz 400 KHz
±200 KHz ±80 KHz
χ
+ +
200 KHz
±20 KHz
χ χ
+
200 KHz
±40 KHz
χ χ
+
100 KHz
±20 KHz
χ
+
100 KHz
±20 KHz
χ
+
Chapter 2