Anyone know what the 'unit' dBSx stands for?

[ptc-1707891]

Normally, my customers use dBm (dB milliwatt) or dB (logarithmic ratio). I now have one using dBSx, which I have checked and is a valid setting on his meter. I have never heard of the unit. Have any of you?

Mark

[ptc-1368288]

dBSx ... could it be dB"Standing Wave ratio", like it was in my time ?
What kind of meter are you talking about ?
dbSx should be implicit of the "measured".

jmG

[ValeryOchkov]

One example the work with dB (Base - the power of human heart, p is the power of others objects: Power plants for example):
http://twt.mpei.ac.ru/ochkov/Mathcad_14/Chapter2rus/2-06-dB.PNG
Val
http://twt.mpei.ac.ru/ochkov/v_ochkov.htm

[LouP]

It appears to be a telecom unit. Check with the manufacturer of the meter if you don't want to just ask your customer. I found one meter with the units (but no description) at www.fetest.com.

Lou

[ptc-1368288]

On 7/6/2009 11:11:30 AM, lpoulo wrote:
>It appears to be a telecom
>unit. Check with the
>manufacturer of the meter if
>you don't want to just ask
>your customer. I found one
>meter with the units (but no
>description) at
>www.fetest.com.
>
>Lou
_____________________________

It makes sense as per my suggestion. I have recollection of testing all our coaxial cabling using a "Standing Waves ratio meter". No recollection of the brand. In fact it was a "Deviation meter" with the 0 scale center.

jmG

[ptc-1707891]

Hi folks,

I think I found out what the unit is. I am taking measurements on a T1 circuit. The meter measures "dBSx," but I can find no description of the unit. However, when I look at the T1 specifications, they use a unit called dBdsx, which is defined as dBdsx(Vpp)=20*log(Vpp/6 V), where 6 V is the nominal peak-to-peak level of a T1 signal. It appears that a number of the meter manufacturers truncate the official unit, dBdsx, to dBSx, dBS, or dBx to make everything fit on their screens.

Thanks for the help.

Mark

[ptc-1368288]

Finally it looks "dBSx" is a power or voltage ratio of a measured signal vs a reference 6V signal ... is it ? a very specific user unit.

jmG

[ptc-1707891]

It is a VERY specific unit to a unique application.

Mark

[ptc-1368288]

On 7/10/2009 10:52:41 AM, mbiegertattbi wrote:
>It is a VERY specific unit to
>a unique application.
>
>Mark
______________________________

Not one pace ahead !

What is it ? A specific unit of what ?
Answer: a specific unit of something or nothing or unknown that nobody knows about. Your definition hits the wall .

jmG

[ptc-1368288]

On 7/10/2009 11:12:10 AM, jmG wrote:
>On 7/10/2009 10:52:41 AM, mbiegertattbi
>wrote:
>>It is a VERY specific unit to
>>a unique application.
>>
>>Mark
>______________________________
>
>Not one pace ahead !
>
>What is it ? A specific unit of what ?
>Answer: a specific unit of something or
>nothing or unknown that nobody knows
>about. Your definition hits the wall .
>
>jmG
>_____________________

Are asking or telling ?

jmG