Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!




Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Stimulus Amplitude VNA E5062A - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues - primarily having to spend time purging garbage posts from the board. At some point I might start the RF Cafe Forums again if the phpBB software gets better at filtering spam.

Below are the old forum threads, including responses to the original posts.
-- Amateur Radio
-- Anecdotes, Gripes & Humor
-- Antennas
-- CAE, CAD, & Software
-- Circuits & Components
-- Employment & Interviews
 -- Miscellany
-- Swap Shop
-- Systems
-- Test & Measurement
-- Webmaster

Measures
 Post subject: Stimulus Amplitude VNA E5062A
Posted: Fri Dec 18, 2009 7:20 am 
 
Captain

Joined: Tue Dec 15, 2009 10:22 am
Posts: 9
Hello

I would like to know if it is possible to choose the amplitude of the stimulus signal in an Agilent E5062A Vector Network Analyzer.

I know I can choose the power (at least a range), but how can I know the amplitude of the signal? can I choose it?

Thank you very much.
 
   
 
Measures
 Post subject: Re: Stimulus Amplitude VNA E5062A
Posted: Thu Jan 07, 2010 7:20 am 
 
Captain

Joined: Tue Dec 15, 2009 10:22 am
Posts: 9
Can't anybody help me?

Can't I determine the voltage of the stimulus signal?

Thanks again.
 
   
 
fred47
 Post subject: Re: Stimulus Amplitude VNA E5062A
Posted: Fri Jan 22, 2010 11:56 pm 
 
General
User avatar

Joined: Wed Feb 22, 2006 3:51 pm
Posts: 113
Given the power and the S11 of the device under test, you can calculate the voltage at the input port.

While I don't have the specifications for the E5062A, usually VNA power level adjustability is limited, so you may not be able to reach the voltage you want.

Why is voltage so important, if you know the power?

Good luck!
 
   
 
Measures
 Post subject: Re: Stimulus Amplitude VNA E5062A
Posted: Mon Jan 25, 2010 6:31 am 
 
Captain

Joined: Tue Dec 15, 2009 10:22 am
Posts: 9
That's the problem: the power cannot be perfectly determined, but just 15dB-wide power ranges can be chosen.

I want to know Vin because I'm interested in obtaining the voltage transfer function and the output voltage.
 
   
 
fred47
 Post subject: Re: Stimulus Amplitude VNA E5062A
Posted: Mon Jan 25, 2010 1:22 pm 
 
General
User avatar

Joined: Wed Feb 22, 2006 3:51 pm
Posts: 113
"Voltage transfer function" by itself is not completely meaningful at high frequencies.

One classic definition is Vout/Vin, when driven from a voltage source, and driving into an open circuit. This can often be approximated at low frequencies (audio), but even there, you must be careful not to make your measurements inaccurate.

Both a pure voltage source and an infinite impedance load are, at some point, impossible to obtain and still be useful. For example, an active oscilloscope probe with 0.5 pF input capacitance still has an input impedance in the hundreds of Ohms at 1 GHz.

If you're using a VNA, you have a 50 Ohm source and a 50 Ohm load. You may be able to compute the voltage transfer function mathematically - but I'm not sure which constraints are important to you. The information is "hiding" mostly in S21, but needs compensation for S11 and S22, probably. Our host here at RFCafe has posted a complete set of equations for various conversions to and from S-parameters at http://rfcafe.com/references/electrical/s-h-y-z.htm

You'll need to identify what you really need, either as a Z-parameter, H-parameter, or Y-parameter.

Good luck!




Posted  11/12/2012

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: AirplanesAndRockets.com

My Daughter's Website: EquineKingdom