Frequency Response Adjustment

This adjustment applies to the following models with firmware below A.09.00:

All adjustments will require the CFG Option. Refer to the CFG Option section for more information.

The SA calibration consists of five different adjustments that should be performed in succession in the following order. For more information, click here.Closed

  1. LO Feedthru

  2. Absolute Amplitude

  3. Frequency Response

  4. Attenuator Slope

  5. IF Frequency Response

The preamp OFF frequency response adjustment is performed with 10 dB RF attenuation. The preamp On frequency response adjustment is performed with 20 dB RF attenuation. In these procedures, numbers of frequencies are adjusted in each band by measuring the difference between the power sensor measurement and the DUT measurement for each target frequency. Each band has a unique CAL file number and frequencies within that band will be stored only in that CAL file using frequency and magnitude pair.

This adjustment generates the calibration factors for the internal source used in the InstAlign functionality.

Related tests:

Total Abs Amp Accy Low Frequency
Total Abs Amp Accy High Frequency

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
(2 required; see NOTE below)

E9304A Opt H20

Power Sensor
(2 required; see NOTE below)

N8485A

Power Sensor
(2 required; see NOTE below)

8485D

Attenuator, 30 dB
(for Option 235)

11708A

Power Splitter, 3.5 mm

11667B

Power Sensor Cable

11730A

BNC Cable

8120-2582

Coaxial Cable

11500E

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

1250-1743

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

 

  • All models require the E9304A H20 power sensors.

  • High frequency models (maximum frequency of 18 GHz or higher) require the N8485A power sensors.

  • High frequency models with Option 235 (preamplifier) require the 8485D power sensors to cover the low power range.

 

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 Sensor Calibration, Channel A
(for E9304A only)

Buried Power Sensor Calibration, Channel B
(for E9304A only)

Power Sensor Calibration (for Option 235)

Splitter Characterization

Frequency Response Adjustment Setup