Attenuator Slope Adjustment

This adjustment applies to the following models:

The attenuator slope adjustment is a rough flatness adjustment for attenuator settings other than 10 dB. The flatness adjustment is performed in 10 dB attenuation only. This adjustment is performed at various frequencies for each attenuator setting in DC-Coupled mode, and at 10 dB of attenuation in AC-Coupled mode for models that allow AC-Coupled mode.

The Total Flatness Correction for any RF Attenuator setting are managed as follows:

Total Flatness Correction = Reference Flatness Correction (generated with 10 dB attenuation) + Attenuator Slope Correction (relative to 10 dB Attenuation) + AC Coupling Correction (if AC Coupling is set)

This calibration should only be performed after replacing the RF attenuators or the front end assembly.

Click here for troubleshooting.

Required Test Equipment

Test Equipment

Recommended Model Number

Microwave Signal Generator #1

PSG Models
(see equipment list)

Power Meter

N1914B

Microwave Power Sensor

  • 2 required
  • Options ≤ 526

N8485A 

Microwave Power Splitter

  • Options ≤ 526

11667B 

Millimeter Power Sensor

  • 2 required
  • Options > 526

N8487A CFT

Millimeter Power Splitter

  • Options > 526

11667C

BNC Cable

8120-1840 

Coaxial Cable, 2.4 mm

8120-6164

Coaxial Cable, 3.5 mm

11500E

3.5 mm (f) to 3.5 mm (f) adapter
(for 3.5 mm source)

83059B

Type N (m) to 3.5 mm (m) adapter

1250-1743

2.4 mm (f) to 3.5 mm (f) adapter
(for 2.4 mm source)

11901B  

3.5 mm (f) to Type N (m) adapter
(8485A adapter)

08485-60005

2.4 mm (f) to Type N (m) adapter
(8487A adapter)

08487-60001

 

Connection Setups

In the following setups, cables are designated as solid lines and direct connections are designated as dashed lines.

Power Meter Calibration

 

Splitter Characterization

 

Attenuator Slope Adjustment Setup