Absolute Amplitude Accuracy Performance Test

(M9391A)

Absolute Amplitude Accuracy is described as the amplitude accuracy versus frequency. The specification excludes IF Bandwidth Switching Uncertainty, Attenuator Accuracy, IF Flatness, Amplitude Linearity, and Conversion Mode dependencies. These other parameters will be tested separately.

Option F1A covers 1.1 to 1.8 GHz, 2.3 to 2.6 GHz, and 4.8 to 6 GHz.

This test will measure the amplitude accuracy versus frequency. The PXIe signal analyzer has three conversion types:

  1. Image Protect (a.k.a Double Conversion) — defined as 1 MHz to 6 GHz

  2. Single Low — defined as 1.1 GHz to 6 GHz

  3. Single High — defined as 400 MHz to 6 GHz

The procedure will also test three different RF Paths: Highpower, Preamp, and Standard Path. The test will be made on the B04 (40 MHz) IF Path. If the PXIe signal analyzer has either Option B10 (100 MHz IF Path) or B16 (160 MHz IF Path), the test will be repeated for that path. Potentially there will be eighteen different sets of data.

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Required Test Equipment

Test Equipment1

Recommended Models2

Signal generator

M9381A Opt 1EA

Power meter

N1914A3

Power sensor
(2 required)

E9304A-H20

Power splitter

11667B

Adapter, 3.5 mm (m) to 3.5 mm (m)4

83059A

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. N1914A power meters with serial number prior to MY53040007 require Service Note N1914A-07 which fixes a power supply ground loop. The ground loop injects noise into the measurement circuits which can cause unstable measurements at low (-30 dBm) power levels.
  4. The 3.5 mm (m) to 3.5 mm (m) adapter between the power splitter and the DUT is critical in this test. Proper connector care and torqueing practices must be followed in order to insure optimal performance.

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.

To view the image, choose from the links below depending on your setup.

ClosedSplitter characterization using a PXIe signal generator as the source

 

ClosedTest setup using a PXIe signal generator as the source

 

ClosedSplitter characterization using a PSG-D signal generator as the source

 

ClosedTest setup using a PSG-D signal generator as the source