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Little problems with an HP8591E

Question asked by Hifreak on Nov 6, 2010
Latest reply on Jul 28, 2012 by dhamilton

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Hello ALL,

When i am callibrating the analyzer, i have sometimes problems with SRQ 110 (cal: res bw amp fail).
In the diagnose screen Display Cal Data all the numbers are ok, but the 3 dB BW AMP 10 Hz gives 1.52.
Do you have an adjustments manual for option 130 NBW?

The next question is that after a hard reset at the beginning screen i don't can choose any more on the softkey between spectrum analyzer and cable tv analyzer( i have options 004, 101, 102, 130, 021, at the backside option number H80).
Do you know what the reason is and i also cannot find it back in the manuals?

With kindly regards,
Hifreak

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tabbott

Nov 9, 2010 9:48 AM

Hello -

Resolution bandwidths <1 kHz are the narrow resolution bandwidths and there is a hardware switch from A11 and A13 RBW boards to the optional A130 board. If the 10 Hz RBW is having the issue, there is not a manual adjustment. The cal amplitude routine automatically calibrates the NRBW’s via DAC control. If that is the issue, the board may need replacing. The part number is 08590-60352 and is actually still available through www.agilent.com/find/parts Make sure the ≥ 1kHz BW amplitude corrections in the display cal table are reasonable as well. BW’s from 3 MHz down to 1 kHz can be adjusted on the A11 and A13. The adjustment procedure is on the web in the service guide at www.agilent.com and search on “8591E”.

The CATV analyzer softkey is active when the measurement personality has been downloaded from the personality card. My guess is this software no longer exists in the instrument. Do you have the option H80 measurement personality? If not, you may be able to call Agilent in the U.S.A. at 1-800-829-4444 and they will sell you a replacement if it is missing.

Regards -

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yngvae2 @ tabbott on Jul 27, 2012 10:25 PM

hi i have an 8593e w tracking gen. and opt 130. i cant get the unit to pass amp cal. im also getting the res bw ampl fail error at 1 mhz res bandwidth. I dont see any way to find your stated display cal data table unless it passes cal. how do I find that table if it fails? also I changed out all the card cage cards as well as the a7 analog interface and the counter lock assembly from parts I know are good and still it fails. according to the service guide those mentioned by me are the only relateable assemblies. so how could it still give me that fail? do I need to adjust the bw filter? how would I do that? thanks !
paul

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dhamilton @ yngvae2 on Jul 28, 2012 6:34 AM

You most likely have a front end hardware failure. Turn off the corrections for the unit in the cal menu. Check with the calibrator your amplitude to the front end uncorrected. It should be about - 20 dBm to -22 dBm.   If it is lower than that you most likely have a problem.

The ResBWAmpFailure could also be a RBW or Log/ Lin alignment issue. Also, they could be defective and need repair..

If you have a NarrowBWAmpFailure it would be the option 130 card.   Also with the option 130 installed, the jumper on the front of the card for Log/Lin assembly should be removed. Did you just add this option?

Is this the unit you have been trying to measure 10 KHz with?

Dave

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3 Replies

tabbott Nov 9, 2010 9:48 AM
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Hello -

Resolution bandwidths <1 kHz are the narrow resolution bandwidths and there is a hardware switch from A11 and A13 RBW boards to the optional A130 board. If the 10 Hz RBW is having the issue, there is not a manual adjustment. The cal amplitude routine automatically calibrates the NRBW’s via DAC control. If that is the issue, the board may need replacing. The part number is 08590-60352 and is actually still available through www.agilent.com/find/parts Make sure the ≥ 1kHz BW amplitude corrections in the display cal table are reasonable as well. BW’s from 3 MHz down to 1 kHz can be adjusted on the A11 and A13. The adjustment procedure is on the web in the service guide at www.agilent.com and search on “8591E”.

The CATV analyzer softkey is active when the measurement personality has been downloaded from the personality card. My guess is this software no longer exists in the instrument. Do you have the option H80 measurement personality? If not, you may be able to call Agilent in the U.S.A. at 1-800-829-4444 and they will sell you a replacement if it is missing.

Regards -
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- yngvae2 @ tabbott on Jul 27, 2012 10:25 PM
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  hi i have an 8593e w tracking gen. and opt 130. i cant get the unit to pass amp cal. im also getting the res bw ampl fail error at 1 mhz res bandwidth. I dont see any way to find your stated display cal data table unless it passes cal. how do I find that table if it fails? also I changed out all the card cage cards as well as the a7 analog interface and the counter lock assembly from parts I know are good and still it fails. according to the service guide those mentioned by me are the only relateable assemblies. so how could it still give me that fail? do I need to adjust the bw filter? how would I do that? thanks !
  paul
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  - dhamilton @ yngvae2 on Jul 28, 2012 6:34 AM
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    You most likely have a front end hardware failure. Turn off the corrections for the unit in the cal menu. Check with the calibrator your amplitude to the front end uncorrected. It should be about - 20 dBm to -22 dBm.   If it is lower than that you most likely have a problem.
    
    The ResBWAmpFailure could also be a RBW or Log/ Lin alignment issue. Also, they could be defective and need repair..
    
    If you have a NarrowBWAmpFailure it would be the option 130 card.   Also with the option 130 installed, the jumper on the front of the card for Log/Lin assembly should be removed. Did you just add this option?
    
    Is this the unit you have been trying to measure 10 KHz with?
    
    Dave
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Little problems with an HP8591E

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