Attenuator Slope Adjustment

The slopes for each attenuator setting in DC Coupled mode, and in the 10 dB AC Coupled mode, are calculated and are stored in an array in EEROM on the A13 Front End Driver assembly. The test is performed at 50 MHz, 2.8 GHz, 6 GHz, 10 GHz, 15 GHz, and 20 GHz for the E4440A, up through 10 GHz for E4445A,  up through 6 GHz for E4443A, and up through 40 GHz for E4446A/E4447A/E4448A. At each test frequency, source power level is set so that the power meter reads -10 dBm with the PSA set at 10 dB, DC Coupled attenuation. This value is then used as the reference for the other attenuator states at that frequency.

Instrument covers do not need to be removed for this adjustment. Also, this adjustment must only be performed if the PSA has valid flatness correction data.

This adjustment should be performed after replacing the A13 Front End Driver, or after replacing the A14 and/or A15 step attenuators.

Required Test Equipment

Test Equipment

Model Number

E4440A
E4443A
E4445A

E4446A
E4447A
E4448A

Synthesized Sweeper

PSG Models
(see equipment list)

X

X

Power Meter

N1914B

X

X

Power Sensor

N8485A 

X

 

Power Sensor

N8487A

 

X

Power Splitter

11667C 

 

X

Power Splitter

11667B 

X

 

BNC Cable

8120-2582 

X

X

2.4 mm Cable

8120-6164

 

X

3.5 mm Cable

8120-4921

X

 

3.5 mm (f) to 3.5 mm (f) adapter

83059B

X

 

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

1250-1743

X

 

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

11901B  

X

 

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

11903D

 

X

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

08485-60005

X

 

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

08487-60001

 

X

Connection Setup

Power Meter Calibration

Attenuator Slope Adjustment Setup