Absolute Amplitude Accuracy Test

This test applies to the following models:

This test verifies the FieldFox absolute amplitude accuracy versus input level. The measurement is performed at 50 MHz. A synthesized signal generator and two characterized step attenuators are used as the signal source to the analyzer. A power meter is used to measure a reference power level from the signal source to the analyzer. The precision attenuators are switched to provide a series of signal power levels below the reference power.

The 10 dB and 1 dB step attenuators are characterized at 50 MHz as a composite attenuator. The characterized loss is used to calculate the absolute input power to the DUT. The 1 dB attenuator is never allowed to drop below 5 dB in this test. The reason for maintaining 5 dB is so the mismatch with the cable is well controlled.

Test type:

performance

Related specification:

50 MHz Absolute Amplitude Accuracy

Related adjustment:

Absolute Amplitude

Required Test Equipment

Test Equipment

Recommended Model Number
(see main equipment list for alternative models)

Signal Generator #1

E8257D with options:

  • 550
  • 1E1
  • 1EA or 1EU

  • UNR or UNX or UNY

Power Meter

N1914A

Power Sensor

N8482A

Attenuator Driver

11713B

Attenuator Interconnect Kit

11716A

6 dB Attenuator, fixed

8491A Opt. 006, Opt. H33

10 dB Attenuator, fixed

8491A Opt. 010, Opt. H33

10 dB Attenuator, step

8496G Opt. 010

1 dB Attenuator, step

8494G Opt. 001

Cable, BNC

8120-2582

Cable, Type-N (m) to Type-N (m)
(2 required)

11500C

Cable, Viking
(attenuator control cable)

8120-2703

Adapter, 3.5 mm (f) to Type-N (f)
(for 3.5 mm source)

1250-1745

Adapter, 2.4 mm (f) to Type-N (f)
(for 2.4 mm source)

11903B

Adapter, Type-N (f) to Type-N (f)

1250-1472

 

Connection Setups

The following notes apply to illustrations in the FieldFox Help:

  • Only a single representative model will be shown.
  • Some illustrations may differ than those in TME.

  • For procedures that apply to multiple ports, illustrations will show the setup on only one test port.

Reference Power Setup

Absolute Amplitude Accuracy Setup