Frequency Response < 3 GHz Adjustment

The Option B7J Flatness Adjustment measures the flatness of the Electronic Attenuators used in Option B7J. This test is very similar in methodology, but done separately as it takes a very long time to run.

In this adjustment flatness corrections are turned off, and amplitude error versus frequency is measured from 9 kHz to 3 GHz. The data is then normalized to 50 MHz to generate corrections relative to 50 MHz. The data is then stored in the PSA memory. If the instrument is outfitted with Option 1DS (100 kHz to 3 GHz preamp) or Option 110 (10 MHz to 3 GHz preamp) then additional flatness corrections are generated with the preamp turned on.

The frequency points from 50 MHz to 3 GHz are determined by the Adaptive Flatness procedure. The Adaptive Flatness procedure manipulates the uncorrected flatness response to gather a custom list of frequency points for each instrument. Below 50 MHz the correction frequencies are fixed at 9 kHz, 50 kHz, 100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, 800 kHz, 1 MHz, 2 MHz, 5 MHz, 8 MHz, 10 MHz, 15 MHz, and 25 MHz.

At each frequency the source amplitude is adjusted to keep the power into the power meter constant.

Three different test configurations are used to test the entire 9 kHz to 3 GHz range. The synthesized sweeper, splitter, and power meter are used from 10 MHz to 3 GHz. The function generator, splitter, and power meter are used from 100 kHz to 10 MHz. To measure frequencies below 100 kHz, the DVM with a 50Ω load replaces the power meter and a function generator is used as the source. The DVM has a very high input impedance, so a 50 Ohm load must be placed in parallel to the DVM to simulate the input impedance of the PSA. Since 50 MHz is the reference amplitude the 100 kHz offset must be transferred to the DVM measurement in order to normalize the data to 50 MHz.

This adjustment saves an output file which lists the corrections that were stored in the instrument. The output file is saved at this location:

<drive>:\Program Files (x86)\Agilent TME\PSA\Output\<Model_Serial#>

Required Test Equipment

Test Equipment

Model Number

E4440A
E4443A
E4445A

E4446A
E4447A
E4448A

Synthesized Sweeper

PSG Models1
(see equipment list)

X

X

Function Generator

33250A

X

X

Digital Multimeter

3458A 

X

X

Power Meter

N1914B

X

X

Power Sensor (2 required)

N8482A 

X

X

Power Splitter

11667A 

X

X

50 ohm Termination

1250-0207 

X

X

20 dB Attenuator

8491A Option 020

X

X

20 dB Attenuator

8493C

X

X

3.5 mm Cable

8120-4921

X

X

2.4  mm Cable

8120-6164

 

X

BNC Cable
(3 required)

8120-2582 

X

X

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

1250-1743

X

 

Type-N (f) to 3.5 mm (f) adapter

1250-1745

X

 

Type-N (m) to 3.5 mm (f) adapter
(2 required)

1250-1744

X

 

BNC (f) to SMA (m) adapter

1250-1200

X

X

Dual Banana to BNC (f) adapter

1251-2277

X

X

BNC Tee (f, m, f)

1250-0781

X

X

Type-N (m) to BNC (f) adapter

1250-1476

X

X

Type-N (m) to Type-N (m) adapter

1250-1475

X

X

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

83059B

X

 

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

11901B

X

X

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

11901D

 

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
  1. If you are using a PSG that does not have Option UNT, this adjustment will cause an "Undefined header" error for the PSG. This is a known error that will not affect the quality of the adjustment.

Connection Setups

Click on the links below to go to that image:

10 MHz Reference Connections

Adaptive Flatness

Adaptive Flatness
(Preamp on, Option 1DS or 110 only)

Power Meter Calibration, Channel A

Power Meter Calibration, Channel B

Frequency Response, 100 kHz to 3 GHz
Splitter Calibration Step 1

Frequency Response, 100 kHz to 3 GHz
Splitter Calibration Step 2

Frequency Response, 100 kHz to 3 GHz
(Preamp on, Option 1DS or 110 only)
Splitter Calibration Step 1

Frequency Response, 100 kHz to 3 GHz
(Preamp on, Option 1DS or 110 only)
Splitter Calibration Step 2

Frequency Response Adjustment Setup, 100 kHz to 3 GHz
Step 1

Frequency Response Adjustment Setup,100 kHz to 3 GHz
Step 2

Frequency Response Adjustment Setup, 100 kHz to 3 GHz
(Preamp on, Option 1DS or 110 only)
Step 1

Frequency Response Adjustment Setup, 100 kHz to 3 GHz
(Preamp on, Option 1DS or 110 only)
Step 2

Frequency Response System Calibration,
< 100 kHz

Frequency Response Adjustment Setup,
< 100 kHz