LFE Overview

The 2-port and 4-port Low Frequency Extension (LFE) options add additional hardware to extend the start frequency of the VNA down to 900 Hz.

Note: Source and Receiver frequencies MUST BE EQUAL if both are in the LFE frequency band and LFE is turned on. If they are both in the LFE band and they are not equal, the following error message is displayed and the VNA will go into Hold mode:

In this topic:

Model Compatibility

The Low Frequency Extension options are available for the following models:

PNA Model

Model Option

2-Port

4-Port

205

220

405

420

425

425+S93029A/B

N5221B

 

 

N5222B

 

 

N5224B

 

 

N5225B

 

 

N5227B

 

 

N5241B

 

 

 

N5242B

 

 

 

N5244B

 

 

 

 

N5245B

 

 

 

 

N5247B

 

 

 

 

N5249B

 

 

 

 

LFE Block Diagram

The following LFE block diagram shows how the low-frequency hardware is configured for a single test port. The other ports are configured similarly.

Supported Applications

The following table shows which applications are supported/not supported by LFE.

Application

Supported by LFE?

Option

Gain Compression

Yes

S93086A/B

Gain Compression Converters

Yes

S93086A/B

Scalar Mixer/Converter (magnitude only)

Yes

S93082A/B

Frequency Offset Mode

Yes

S93080A

Time Domain

Yes

S93010A/B

Dynamic Uncertainty Analysis

Yes

S93015A/B

Fast CW

Yes

S93118A/B

Auto Fixture Removal

Yes

S93007A/B

 

Scalar Mixer/Converter + Phase

No

S93083A/B

Vector Mixer/Converter

No

S93083A/B

Embedded LO

No

S93084A/B

Swept IMD

No

S93087A/B

Swept IMD Converters

No

S93087A/B

IM Spectrum

No

S93087A/B

IM Spectrum Converters

No

S93087A/B

True-Mode Stimulus Application (TMSA)

No

S93460A/B

Source Phase Control

No

S93088A/B

Multiport

No

S93551A/B

Differential IQ

No

S93089A/B

Spectrum Analyzer

No

S93090xA, S9309xA

Pulsed RF

No

S93025A/B with 021 and 022

Noise Figure

No

S93029A/B

Noise Figure Converters

No

S93029A/B