19 | Keysight | M9485A PXIe Multiport Vector Network Analyzer 1 MHz/50 MHz to 9 GHz - Data Sheet

Test port input

Description

Typical

Supplemental information

Aperture (selectable)

(frequency span)/(number of points - 1)

Maximum aperture

25% of frequency span

Minimum delay

Limited to measuring no more than 180°

of phase change within the minimum

aperture.

Accuracy

See graph below (typical)

The following graph shows group delay accuracy with 3.5 mm connectors, full 2-port calibration and a 10 Hz IF bandwidth.

– Calibration kit (85033E).

– Insertion loss is assumed to be < 2 dB.

– Source/Receiver: Standard Configuration, Source/Receiver Reference/Test Attenuator: 0 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)]

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).