The HP 5335A born with factory installed option 010 might happen not to have both the regular crystal and the jumper at all. This is the case of one of mine.
Antonio I8IOV >----Messaggio originale---- >Da: Tom Holmes <thol...@woh.rr.com> >Data: 18/05/2016 4.06 >A: "Discussion of precise time and frequency measurement"<time-nuts@febo.com> >Ogg: Re: [time-nuts] FS HP 5335A > >HI Bob... > >Thanks for the tip. Have been down that road with this one and it didn't fix it. I think someone may have deliberately disabled the internal timebase to prevent users from having anything but the house standard in play. > >Tom Holmes, N8ZM > >-----Original Message----- >From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart >Sent: Tuesday, May 17, 2016 7:08 PM >To: Discussion of precise time and frequency measurement <time-nuts@febo.com> >Subject: Re: [time-nuts] FS HP 5335A > >Hi, > >I know this is a for sale post, but there's a jumper that needs to be there to work with the regulator oscillator. Page 2-4 of the Operating and Service Manual (05335-90021) details the instructions for installing the Option 010, the 10811 OCXO. Instruction "c" is below. You'd need to add the jumper back in. The factory jumper looks like a resistor. It may simply be cut with side cutters on your unit. You can use just a piece of wire, of course. > >"c. Remove electrical lead (jumper), PIN 8159-0005, that connects A4U1B(6) and U2B(6)." > >Bob _______________________________________________ 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.
