It was very easy to replace the input connector on my 3586A, not sure about the other versions. Didier KO4BB Bill Riches <bill.riches@verizon.net> wrote: >I did install a bnc connector for input - pain - it took a few hours. >Save >yourself a lot of grief and purchase a Canare bcj-vwp bnc adapter from >Markertech or others. Works fine. > >Bill Riches, WA2DVU > >Now that I have my new [30 year old] HP 3586 making measurements over >the >GPIB bus I have a few questions. > >Setting AVErage makes measurements take about three seconds. >Is there a way to control the number of samples averaged? > >How difficult is it to open up the 3586 to replace the input connector >with >a BNC connector? > >Is there a way to update and/or hack the firmware? Is source code >available? > >-- >Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com >Developer of Industrial ZMODEM(Tm) for Embedded Applications > Omen Technology Inc "The High Reliability Software" >10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 > > >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. > > > >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr phone with K-9 Mail. Please excuse my brevity.

I found some information on the 3586 by looking at the service manual PDF. The processor is a Motorola 6800, the same family I used in 1975 for Sidereal. According to the parts list, the 32768 ROMS are in sockets. Two revisions of firmware are discussed. The newer revision can be identified by the 3586 starting up with 10k input instead of 75 ohms. -- Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc "The High Reliability Software" 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430

Hi Gang, Has anyone looked into working over the filters and detection circuitry in the C model. I have not looked to see if that part is discrete or firmware. Thanks, Hadley K7MLR

There is a quite the knowledge of this and many other HP/Agilent instruments on the Yahoo group "hp_agilent_equipment". That is not to say there isn't here. But just more members since this is time-nuts not T&M-nuts. Including reference to at least one web site that has details on things like the difference between the A, B, and C version (there are more the three versions), adding AGC, etc, etc, I won't list them here but they can be found via Google 3586A/B/C. KO4BB and VE2AZ are a good place to start. -pete On Tue, Jul 24, 2012 at 4:49 PM, Had <had@to-way.com> wrote: > > > Hi Gang, > > Has anyone looked into working over the filters and detection circuitry in > the C model. I have not looked to see if that part is discrete or firmware. > > Thanks, > > Hadley > K7MLR > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.