Hi Dan, 
Thank you very much for your very fast reply. First time for me to repair a 
measurement device. I hope my knowledge is enought. I will try to get v1 were 
you told me. Its good to Herr that its probably not the End of my short time 
with the HP3561a. 
Best regards
Norman 

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  Am Fr., Nov. 12, 2021 at 20:25 schrieb Dan Rae via 
time-nuts<[email protected]>:   On 11/12/2021 9:57 AM, Norman Reitz via 
time-nuts wrote:
> Hi,
> I hope someone here can help. I want to setup a HP 3048a phase noise 
> measurement Set. So I bought the HP 3561a  an the interface. After testing 
> the HP3561a I hat two error Codes: #0 7-26 and  #0 7-31. Does someone got the 
> servicemanual for further Informations?
> Thx and Kind regards Norman

Norman, those are RAM error codes, Pages 6-59 to 6-61 in volume 1 of the 
service manual refer to these.  There are other codes on the screen that 
will tell you exactly which IC has died.  Artek has the manual.

I've had two with similar faults, replacing the IC indicated cured them.

Dan
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