Impedance Calibration Test Jig - Release 5.20 Beta 38

[tekuhn]

I apparently was looking at older documentation that gave the diagram for the test jig for using the sound card inputs and output to build an apparatus for testing driver impedance. I built one using a .1% 100Ω resistor. I also installed a switch to short across the resistor because it said that the calibration process required the load to be disconnected and the resistor to be shorted and the RSense value to be changed to 0Ω. I am looking at the docs for the newest beta version and there is no mention of shorting the resistor for the calibration process. Is that right - no need to short any more - just leave the RSense value to the actual measured value of the resistor and remove the driver load? Fantastic program, BTW. I'm really learning a lot and having a blast. I apologize if this has been answered elsewhere - I did attempt to look first..

Tom

 

[John Mulcahy]

That's right, the sense resistor is not shorted for calibration any more.

 

[tekuhn]

That's right, the sense resistor is not shorted for calibration any more.

Thank you. I can re-purpose the switch to short the load terminals for lead calibration.

 

[tekuhn]

I got the impedance test box going and it calibrated and works perfectly. Thank you for the help!

 

[DELAMOTTE]

[QUOTE = "tekuhn, message: 48191, membre: 13069"]
Je vous remercie. Je peux réaffecter l'interrupteur pour court-circuiteur les bornes de charge pour l'étalonnage des fils.
[/CITATION]

67/5000

Bravo pour ta petite boite, elle devrait servir d'exemple à l'aide de REW

Vous pouvez me donner un petit schéma de votre nouvelle connexion

 

[Bernard]

[QUOTE = "tekuhn, message: 48191, membre: 13069"]
Je vous remercie. Je peux réaffecter l'interrupteur pour court-circuiteur les bornes de charge pour l'étalonnage des fils.
[/CITATION]

67/5000

Bravo pour ta petite boite, elle devrait servir d'exemple à l'aide de REW

Vous pouvez me donner un petit schéma de votre nouvelle connexion

Bonsoir M. Delamotte,
https://www.roomeqwizard.com/help/help_en-GB/html/impedancemeasurement.html#top
Bernard

 

[DELAMOTTE]

[QUOTE = "Bernard, poste: 50437, membre: 200"]
Bonsoir M. Delamotte,
https://www.roomeqwizard.com/help/help_en-GB/html/impedancemeasurement.html#top
Bernard
[/CITATION]

Bonsoir Bernard, merci pour la réponse mais elle ne dit pas ou est réassignée l'interrupteur. Je ne suis pas électricien du tout.
JP

 

[Bernard]

No need for a switch with the latest version as the Rsense resistor is not shorted for calibration any more.
The two requirements are the precise value of the resistor and it must be a non-inductive one.

 

[Bernard]

.