Freq Resp High Freq Preamp Off Performance Test

Frequency Response (aka. Flatness) is defined as the amplitude deviation from the reference amplitude at 50 MHz. The complete analyzer Frequency Response is measured with the following tests:

A “buried power sensor” technique is used to characterize the tracking error of a power splitter in order to avoid the relatively large specified tracking error. This technique reduces the measurement uncertainty to verify the frequency response specification for the 7.5 GHz to 26.5 GHz range. The buried sensor calibration is valid for four hours.

This test determines the relative frequency response over the frequency range from 7.5 GHz to 13.6 GHz (Option F13), or 26.5 GHz (Option F26).

Required Test Equipment

Test Equipment

Recommended Model Number1

Microwave signal generator #1

PSG models
(see main equipment list)

Power meter

N1914A

Microwave power sensor

  • 2 required

N8485A CFT

Power splitter

11667B

Cable, BNC (m) to SMB (f)

8121-2063

Cable, Coaxial, 3.5 mm (m) to 3.5 mm (m)

11500E

Adapter, 3.5 mm (m) to 3.5 mm (m)2

83059A

Adapter, 3.5 mm (f) to 3.5 mm (f)

  • For 3.5 mm source

83059B

Adapter, 2.4 mm (f) to 3.5 mm (f)

  • For 2.4 mm source

11901B

Adapter, 3.5 mm (f) to Type-N (m)

  • For the 8485A power sensor

08485-60005
  1. Refer to the main equipment list for a list of alternative models (if available).
  2. 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.

Connection Setups

Power Meter Calibration

Splitter Characterization Setup

 

Freq Resp High Freq Preamp Off Test Setup