Amplitude Linearity Performance Test

(M9391A)

This test measures the amplitude linearity of the M9391A. Amplitude linearity is the amplitude accuracy over a range of input signals relative to an expected input level of +5 dBm. The test technique uses the two-source frequency offset method. The two source technique is accurate over small amplitude ranges, so step attenuators are used to step the amplitude over a wider range. The actual attenuator step loss is not critical as the measurement is re-referenced for each attenuator step. The linearity sections are then “stitched” together for all attenuator steps.

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Required Test Equipment

Test Equipment1

Recommended Models2

Signal generator3

M9381A Opt 1EA

Power divider

87302C

Fixed attenuator, 6 dB
(only required if using the PXIe signal generator)
(2 required)

8493C Opt 006

Step attenuator, 10 dB

8496G Opt 001

Step attenuator, 1 dB

8494G

Attenuator driver

11713B

Frequency reference module

M9300A
  1. Refer to the main required equipment list for a list of available adapters and cables determined by the source ETE configuration.
  2. Refer to the main required equipment list for alternative models.
  3. Two signal generators are required for this test. See the illustrations below for possible configurations.

Connections and Setup Procedures

The illustrations below show the recommended M9381A PXIe signal generator. If your setup is using the alternative M9380A PXIe signal generator, refer to the M9380A Startup Guide for the default cable interconnections.

ClosedTest setup using two PXIe signal generators for both sources

 

ClosedTest setup using a PXIe signal generator and a PSG-D signal generator

 

ClosedTest setup using two PSG-D signal generators for both sources