Thread: 8340B unleveled message??


Permlink Replies: 1 - Pages: 1 - Last Post: Sep 6, 2012 10:36 AM Last Post By: tabbott
martine1212

Posts: 26
Registered: 05/30/07
8340B unleveled message??
Posted: Aug 15, 2012 12:08 AM
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Good morning:
Sorry to bother you again, I have an 8340B options H01....
above 25.7GHz setting a power level greater than about 3dBm shows an unleveled message... which is normal and goes away when the power level is set to a lower value.
The problem is when, for example, the power level is set to something higher (well above the capabilities of the instrument around 26GHz) like +10dBm (with the knob or by entering the a value with the keypad).... unleveled message shows up (output power goes way down) and it does not go away until the power is decreased to around -10dBm, then it can go up to around +3dBm.
It seems that if the power level is set to high, the unleveled condition sort of locks up.... which is a problem with the 8510C since it set the default power level to 10dBm and above 25.7GHz it losses lock.

Is this normal, I could not find much about it on the manuals.

Thank you

Edited by: martine1212 on Aug 15, 2012 12:08 AM

Edited by: martine1212 on Aug 15, 2012 12:15 AM
tabbott


Posts: 1,427
Registered: 07/24/09
Re: 8340B unleveled message??
Posted: Sep 6, 2012 10:36 AM   in response to: martine1212 in response to: martine1212
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Hi -

I believe this operation of automatically decreasing the power is normal - as if you ask the 8340 to generate too high a power level you are really pushing some very expensive and now probably unavailable power circuits/amplifiers.

Unfortunately, we do not have all the information on the 8340 series.

Hopefully someone from the Forum community can step in and assit.

Regards -

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