13 | Keysight | E5080A ENA Series Network Analyzer, E5092A Configurable Multiport Test Set - Data Sheet
Group delay1
Description
Specification
Typical
Aperture (selectable)
Maximum aperture
Minimum delay
(frequency span)/(number of points - 1)
25% of frequency span
Limited to measuring no more than 180° of phase
change within the minimum aperture.
Accuracy
See graph below (typical)
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).
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)]
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