Absolute Amplitude Accuracy Performance Test

(M9393A)

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. We will test these other parameters separately.

The Total Amplitude Accuracy is the sum all of these separate parameters. The intent of the Total Amplitude Accuracy specification was to provide one amplitude specification. Since we are testing the parameters separately, we will not test Total Amplitude Accuracy.

This test will measure the amplitude accuracy versus frequency. The M9393A signal analyzer has three conversion types:

  1. Double Conversion (a.k.a Image Protect) — defined as 10 MHz to 3.6 GHz (lowband path)

  2. Single Low Conversion — defined as 3.6 GHz to 27 GHz (highband path)

  3. Single High Conversion — defined as 3.6 GHz to 27 GHz (highband path)

The test will also test three RF Downconversion Paths: Preamp On, Preamp Off, and Bypass Path. The test will be performed on two IF Filter paths as well.

Click here for troubleshooting help.

Required Test Equipment

Test Equipment1

Recommended Models

Alternate Models

Signal generator

PSG models
(see equipment list)

E8257D, E8267D, E8257C, E8267C with Options 1E1, 1EA/1EU, and frequency Option 550 or 540

Power meter

N1914A2

N1912A
E4419A
E4419B

RF power sensor

E9304A-H20

E9304A-H18

High-power power sensor

N8487A

8485A3
N8485A3
N8485A CFT3
8487A
N8487A CFT

Fixed attenuator, 20 dB

8490D Opt 020

  

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. 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.
  3. The 8485A, N8485A, and N8485A-CFT power sensors are not allowed with Option F27 because the 27 GHz stop frequency is higher than the specified frequency range of the sensor.

Connections and Setup Procedures

Click on the links below to view setup images.

ClosedSetup for Preamp Off

 

ClosedSetup for Preamp On