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8566 SA bus interconnect pinout

Question asked by agilent_klon on Sep 2, 2008
Latest reply on Sep 5, 2008 by sampet

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Hi,

I just acquired a 8566 SA with display but I don't have the bus interconnect cable (DB50 on one end and centronics 50 on the other). Does anyone know the pinout for this cable?

thanks!

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sampet Sep 2, 2008 5:20 PM
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Here is the pinout for the Hp 8566 / 8568 to 85662A interconnect cable. I am in the process of trying to get my 8568 working. Good luck with yours.

Sam
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- 8566001.pdf199.7 KB
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sampet Sep 2, 2008 6:05 PM
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I see I only gave you half of the story. I built my own interconnect and will look for the pinout for the RF section.

Sorry about that.

Sam
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sampet Sep 2, 2008 6:47 PM
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I have attached an Excel spreadsheet that I used to make my cable. I forgot where I got the rest of the information but the cable works. I looked through my manuals but couldn't find the RF section pinouts right now....Disclaimer...Use at your own risk.

I'm fighting some display problems. I'm sure one of my 2 units has a bad CRT. The other one shows some promise but I'm working on it intermittently.

I couldn't attach the Excel file. I converted it to PDF and it seems to work.

Sam
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- SpecAnalyzer Cable.pdf24.7 KB
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agilent_klon Sep 2, 2008 7:38 PM
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"
I have attached an Excel spreadsheet that I used to make my cable. I forgot where I got the rest of the information but the cable works. I looked through my manuals but couldn't find the RF section pinouts right now....Disclaimer...Use at your own risk.

I'm fighting some display problems. I'm sure one of my 2 units has a bad CRT. The other one shows some promise but I'm working on it intermittently.

I couldn't attach the Excel file. I converted it to PDF and it seems to work.

Sam
"

Hi Sam,

Thank you very much for the info. Yes, the RF section service manual doesn't have the pinout.

Mine has a long way to go. for 1) the oven doesn't give out 10mhz, but the reference loop can be phase locked to an external freq standard . 2) The RPG (pot) is shorted-:). 3) leaf spring is missing on some buttons.

Good thing is that the PLL1,2,3 are locked (lights are on) and the YIG is working, not sure if the M/N loop and the YTO loop are locking yet.

BTW, did you make your own IF coax interconnect cable as well? That one seems pretty hard.

Good luck with your unit!

Thanks again!
Calvin
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sampet Sep 5, 2008 9:17 AM
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Hello Calvin

I did make my own coax interconnect cable but did it in a quick and dirty way since troubleshooting was my main endeavor. I did a little research and found that Mouser carried the parts required. I have attached the parts list except for the cable. I actually had enough remnants of co-ax to make mine. Only 4 cables are required. It's easier to make than the 50 pin cable.

Good luck with your analyzer. I an still looking for a usable 8566 but I have enough work with my 8568 for now.

Sam
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- Analyzer_Co-Ax_Cable.pdf13.1 KB
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8566 SA bus interconnect pinout

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