Re: [time-nuts] HP 10811-60165 Double Oven Crystal Oscillator Pin-Outs
That pin-out sounds promising as this unit has BLK-RED-BLK-ORG-YEL-GRN-BLU, which seems consistent with the one that you provided. Did you source that from one of HP's various guides or somewhere else? CS -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On Behalf Of Richard H McCorkle Sent: Tuesday, February 18, 2014 11:07 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 10811-60165 Double Oven Crystal Oscillator Pin-Outs Chris, The 10811-60165 may be similar to the HP 10811-60158 that uses using the following pin-out: 1 - BRN Oscillator Return (Com) 2 - RED Oscillator Power (+12V) 3 - ORG Oven Monitor Return (Com) 4 - YEL Oven Monitor Output 5 - GRN Oven Power (+18-24V) 6 - BLU Oven Return (Com) The following description is from the 10811 A/B Manual where the recommended oven monitor circuit is shown: The Oven Monitor Output is an indicator of oven warm-up. At initial turn-on (warmup) the oven monitor will go to approximately 1.5 volts below the oven power supply voltage. After the oven cuts back, the output will drop to approximately 3.5 volts (at 25°C). The output impedance of this circuit is 10,000 ohms. Richard > I've seen a pin-out for the outer-oven 6-position connector (2 heater wires, > 2 thermistor wires), but I've not found anything on the pin-out of the other > 6-position connector. Has anyone come across the pin-outs for the > 10811-60165 connectors? > > CS > ___ > 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. ___ 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] HP 10811-60165 Double Oven Crystal Oscillator Pin-Outs
I've seen a pin-out for the outer-oven 6-position connector (2 heater wires, 2 thermistor wires), but I've not found anything on the pin-out of the other 6-position connector. Has anyone come across the pin-outs for the 10811-60165 connectors? CS ___ 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.
Re: [time-nuts] Trimble Thunderbolt 10MHz amplitude jitter
Arthur On 19 Apr 2010, at 20:48, Arthur Dent wrote: > You may have missed my post yesterday where I said: > "I had a thunderbolt that displayed a temperature reading of -54.99°C, which > I was pretty sure wasn't correct. ;-) Apparently the reference in the > DS1620 > chip either shorted or opened so this "D" revision chip was outputting its > lowest possible reading. I replaced it with a "C" revision chip that I found > (date code 9710C2) and it works great. > > So If you have an "E" revision DS1620 chip that displays the temperature in > steps and you want to replace it, either a "C" or a "D" revision chip appears > to > work as a replacement. Trimble apparently started using the "E" revision chip > around mid 2004." I only joined this list a few hours ago and hadn't searched the archive for which I apologise. Many thanks for the info re the DS1620 chip. I'll have to take the lid off and see what is currently installed. Chris ___ 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] Trimble Thunderbolt 10MHz amplitude jitter
Hi I'm new to this list having been recommended to try here for a solution to my problems by Tom Holmes, N8ZM. I have a 2nd hand Trimble T-bolt which I am trying to use to provide a GPSDO 10MHz reference for my High Performance Software Defined Radio (HPSDR). I bought the unit from an outlet in California last November but, due to circumstances, have only just got around to using it . The first thing I noticed was the Temp pane in TBOLTMON shows -30.8C. Jeff Cook G0AFQ sent me a screen capture of his set-up which shows a temp of 36.7C - more like what I would expect to see. TBOLTMON doesn't show any Critical or Minor alarms and the Lat, Long & Alt are all nominal. The next thing I checked was the output from the 10MHz osc. The amplitude displays serious jitter of several 10s of mVs. The amplitude jitter seems to be cyclic. There is what appears to be a square-wave impressed on the envelope but at a frequency which is not harmonically related to the base frequency. So the amplitude jitter travels along the 10MHz envelope asynchronously. The PPS output displays a 10uS pulse at 1 second intervals, so that appears to be working. I've checked the power rails to the Thunderbolt. All are within a few mV of nominal and clean on a 'scope. So it isn't a problem caused by the power supply. Has anyone else seen these problems? Can anyone suggest a cure? I'm happy to approach the supplier of the T-Bolt and see if they will exchange the unit but I thought I'd pick a few brains first. Cheers Chris G4NUX ___ 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.
