E5072A Datasheet, PDF (13/23 Pages) Keysight Technologies – E5072A ENA Series Network Analyzer

13 | Keysight | E5072A ENA Series Network Analyze 30 kHz to 4.5/8.5 GHz - Data Sheet
Group Delay ¹
Description
Aperture (selectable)
Maximum aperture
Minimum delay
Accuracy
Specification (dB)
(frequency span)/(number of points - 1)
25% of frequency span
Supplemental information
Limited to measuring no more than 180° of phase change within the minimum
aperture.
See graph below (Typical)
The following graph shows group delay accuracy with type-N connectors,
full 2-port calibration and a 10 Hz IF bandwidth.
–– Calibration kit (85032F).
–– Insertion loss is assumed to be < 2 dB.
In general, the following formula can be used to determine the accuracy
(in seconds) of a specific group delay measurement:
± phase accuracy (degrees)/[360 x aperture (Hz)]
Group Delay
100
10
1
0.1
0.01
0.001
0.01
0.1
1
10
100
Aperture (MHz)
Figure 11. Group delay
1.  Group delay is computed by measuring the phase change within a specified step (determined by the frequency span and the number of points per sweep).