[time-nuts] Jackson Labs Fury Isotemp OCXO134-10
I think that I've managed to keep a low profile here, trusting that I would learn more if I refrained from random interjections of ill-informed thoughts. However, there comes a point in every man's life... A year or two ago, I took advantage of Said's offer and purchased one of the Jackson Labs OEM external OCXO Fury units and am attempting to put it to work. I've decided to use an Isotemp OCXO134-10 oscillator and have several decisions which I would like to vet with those of you that have been down this road before. The Isotemp unit has an EFC range of 0 to 8 Volts; the Fury has an EFC range of 0 to 5 volts. Using my HP 53131A, I'm able to adjust the Isotemp to 10 MHz +- 5 mHz with an EFC voltage of 4.64 volts. That is within the adjustment range of the Fury, but I'm not sure of the accuracy of the HP53131A. Should I construct a resistive network ala Brooks Shera to 'boost' the EFC range just in case or would I be better off just using the Fury 'as is'? Secondly, the Jackson Labs advises that since the Fury uses the external oscillator as its clock, that the oscillator should be powered up before the Fury itself. I was hoping that I would be able to use a single power switch to power both the oscillator and the Fury simultaneously, but now I'm not so sure. Finally, are there any of you that have used the Isotemp OXCO134-10 with the Fury? Have any of you worked out the various SERVO settings that the Fury makes available? I'm interested in the DAC gain, EFC scale, EFC dampening and Phase compensation. Any and all advice will be gratefully accepted. -- kc0ukk at msosborn dot com ___ 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] Jackson Labs Fury Isotemp OCXO134-10
Matt Osborn wrote: I think that I've managed to keep a low profile here, trusting that I would learn more if I refrained from random interjections of ill-informed thoughts. However, there comes a point in every man's life... A year or two ago, I took advantage of Said's offer and purchased one of the Jackson Labs OEM external OCXO Fury units and am attempting to put it to work. I've decided to use an Isotemp OCXO134-10 oscillator and have several decisions which I would like to vet with those of you that have been down this road before. The Isotemp unit has an EFC range of 0 to 8 Volts; the Fury has an EFC range of 0 to 5 volts. Using my HP 53131A, I'm able to adjust the Isotemp to 10 MHz +- 5 mHz with an EFC voltage of 4.64 volts. That is within the adjustment range of the Fury, but I'm not sure of the accuracy of the HP53131A. Should I construct a resistive network ala Brooks Shera to 'boost' the EFC range just in case or would I be better off just using the Fury 'as is'? If you use a non inverting buffer amplifier with a gain of 1.6 you will increase the allowance for OCXO aging, otherwise you are a little close to the Fury EFC output limit of 5V. Have you tried connecting the OCXO to the Fury and seen how close to the limit the OCXO EFC is when lock is achieved? Secondly, the Jackson Labs advises that since the Fury uses the external oscillator as its clock, that the oscillator should be powered up before the Fury itself. I was hoping that I would be able to use a single power switch to power both the oscillator and the Fury simultaneously, but now I'm not so sure. You still can if you use a suitable delay circuit. Finally, are there any of you that have used the Isotemp OXCO134-10 with the Fury? Have any of you worked out the various SERVO settings that the Fury makes available? I'm interested in the DAC gain, EFC scale, EFC dampening and Phase compensation. Any and all advice will be gratefully accepted. -- kc0ukk at msosborn dot com Bruce ___ 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] Rb lamp lifetime...
Hi Dick, I guess I should have been more clear. By locking I meant using the 1pps output of the Trimble and a separate house standard connected to a separate controller board such as Brooks Sheras circuit. The oscillator in the Trimble is ok, but it is not the same as a high quality crystal oscillator with a larger thermal mass and a double oven. The Trimble specs for a 1 second measurement period (i.e., using it as an external reference for your counter) is only good to 1xE-9. To get the 1.16xE-12 takes a 24 hour period as noted in the spec sheet. An hp 10544B is specd for short term stability at 1E-11 for 1 second averaging. It would be a better flywheel (when GPS is screwing up) for a house reference source using the GPS to keep the long term average in check. For the extreme, if you want to spend the money, use a Rubidium oscillator. The difference being what happens during any period when the GPS is not in control. Of course a Rubidium would make a good short term portable source without the GPS control. If possible it is better to keep a reference standard unperturbed and just keep track of the actual value. From that data you know the deviation and slope of any drift. It is all a matter of keeping records. In primary labs that is what is done with primary standards as most are not adjustable, they are not messed with and only the measurement values are reported. It is up to the owner to know what to do with the information. Of course there are some items that are adjustable and may very well be adjusted, would depend upon the item and the customer needs. In the case of a high quality Rubidium, it is stable enough to be treated as a short term reference. In such a case it would only be compared to, not controlled by the GPS. Careful measurement, extremely careful adjustment and good records would allow it being used as high quality portable standard if it is kept hot the whole time during its use. BillWB6BNQ Richard W. Solomon wrote: I am confused (a normal state). Why would locking an external oscillator to the Trimble be better than using the 10 MHz output of the Trimble ? Wouldn't the external oscillator follow the Trimble signal ? Since I have one and just use the 10 MHz output you got my attention. I do have a 970 MHz brick locked to one of my HB GPSDO's that I use for Service Monitor Calibration. Perhaps you were thinking of locking a Sig Gen using the Trimble ?? 73, Dick, W1KSZ -Original Message- From: WB6BNQ [EMAIL PROTECTED] Sent: Nov 1, 2008 8:31 PM To: Yuri Ostry [EMAIL PROTECTED], Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Rb lamp lifetime... Hi Yuri, Unless you need the longer term stability of an undisciplined Rb source, I think you would be better served to get one of the ÂTimenuts group Trimble Thunderbolt GPS units to use as a home standard. It is available via this page: http://www.tapr.org/kits_thunder.html and info about the unit is available at this URL: http://www.leapsecond.com/tbolt-faq.htm Add an external very high quality crystal oscillator locked to the Trimble and you will have the same stability of a good Rb source. Most would use a high quality Rb source, undisciplined, as a tool for comparing or generating specifications of crystal oscillators. It seems that the Rb standards last longer turned off. My understanding (subject to disagreement) is the Rubidium in the lamp ends up coating the walls of the lamp and reducing the transmission through the glass, i.e., the signal gets more and more noisy as time goes on. Also, it seems that the Rubidium may permeate through the walls of the glass housing and thus reduce the amount of Rb over time. I have not heard of anyone reversing the condition. Of course, other things can go wrong with the Rb source besides the lamp. A very high quality crystal oscillator would most likely last longer with fewer problems. I have several +40 year old hp counters with decent oscillators still operating. BillWB6BNQ Yuri Ostry wrote: Hello, Readed list archives and googled a lot, and seen two opposing points of view - one is that there is nothing to age in Rb lamp, another is that Rb lamp is degrading when in operation (without details, how and why). I'm planning to get some Efratom Rb oscillator to use it in a constantly running home lab frequency reference. Trying to understand for myself, is it worth to get spare unit (or even two) of the same model just to have replacement lamp on hand. One more question - does someone seen Rb standard that is malfunctioned due to degraded lamp, that, at same time, does have good vacuum. If so, which model, and how the failed lamp looks like? Was there any attempts to rejuvenate the lamp? (for example, heating to remove glass darkening, if any, or similar experiments). By the way,
Re: [time-nuts] Rb lamp lifetime...
Yuri, as a rule of thumb, read my message posted here last month: http://www.febo.com/pipermail/time-nuts/2008-October/033926.html I have 10 EFRATOM LPRO, and only one came with a faulty lamp. I think it lost vacuum, and the glass looks clear but with small white pigments. I inspected some of the other lamps, and the glass looks more or less brownish. No other tests made on the lamps. 73, Antonio I8IOV Hello, Readed list archives and googled a lot, and seen two opposing points of view - one is that there is nothing to age in Rb lamp, another is that Rb lamp is degrading when in operation (without details, how and why). ___ 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] Rb lamp lifetime...
Hi Antonio, I have taken the cover off my LPRO but I could not see the lamp. I guess it is in the smaller housing. What does the lamp look like and how do you remove it? I do not want to damage my unit. cheers, Neville Michie On 02/11/2008, at 9:06 PM, iovane@@inwind..it wrote: Yuri, as a rule of thumb, read my message posted here last month: http://www.febo.com/pipermail/time-nuts/2008-October/033926.html I have 10 EFRATOM LPRO, and only one came with a faulty lamp. I think it lost vacuum, and the glass looks clear but with small white pigments. I inspected some of the other lamps, and the glass looks more or less brownish. No other tests made on the lamps. 73, Antonio I8IOV Hello, Readed list archives and googled a lot, and seen two opposing points of view - one is that there is nothing to age in Rb lamp, another is that Rb lamp is degrading when in operation (without details, how and why). ___ 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.
Re: [time-nuts] Jackson Labs Fury Isotemp OCXO134-10
Secondly, the Jackson Labs advises that since the Fury uses the external oscillator as its clock, that the oscillator should be powered up before the Fury itself. I was hoping that I would be able to use a single power switch to power both the oscillator and the Fury simultaneously, but now I'm not so sure. Give it a try and see what happens. Or wait and see what Said says. Getting started is one of the messy areas of digital design. The general idea is that you have to hold the CPU reset until power is stable and the oscillator is generating a clean signal. To see if a design will work cleanly, you have to find that part of the CPU data sheet, the startup specs for your oscillator, and the specs for the power-up reset logic. If you are lucky, the power-up reset logic is a tiny magic chip that has clean specs. The reset logic is built-in to many of the smaller micros (cost savings), but they sometimes requires some power ramp-up specs. (aka they don't work cleanly in brownouts.) I can't find any startup specs on my copy of the data sheet for the Isotemp OCXO134-10. (Maybe I missed it.) I'm not looking for the stability type warmup time of several minutes. I'm looking for something like a few ms, the time it takes the crystal to get past the startup transient and put out a clean signal even if the frequency isn't right yet. -- These are my opinions, not necessarily my employer's. I hate spam. ___ 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] Rb lamp lifetime...
Hi Neville, inspecting the lamp is a quite easy job. Yes, it is in the smaller housing. Unlock the check nut just enough, and unscrew the lamp (along with the check nut) using a point shaped tool (a toothpick). It is easy. Don't touch it with fingers. Before doing this, take note of how much the lamp protrudes from the housing. If you have problems, feel free to ask. Antonio I8IOV Hi Antonio, I have taken the cover off my LPRO but I could not see the lamp. I guess it is in the smaller housing. What does the lamp look like and how do you remove it? I do not want to damage my unit. cheers, Neville Michie ___ 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] Jackson Labs Fury Isotemp OCXO134-10
Regarding your second question concerning power supply sequencing. How about using one of the Power Supply Sequencer chips (e.g. MAX6819)). The output of your power supply would go directly to the external OCXO, the Power Supply Sequencer chip and the input to a MOSFET switch. Output of the MOSFET switch goes to the Fury. When the power supply is switched on the following sequence occurs (assuming a MAX6819): 1) Power is applied to the OCXO, MAX6819 and MOSFET switch input 2) The MAX6819 starts a 200 millisecond delay 3) After 200 milliseconds the MAX6819 turns the MOSFET switch On, powering the Fury On MOSFET switches can be used that have only a few tenths (or less) of an ohm of ON resistance. This minimizes degradation in voltage regulation of the power applied to the Fury. The MAX6819 data sheet gives useful examples applicable to the above application. 73, Jim Hall W4TVI -- From: Matt Osborn [EMAIL PROTECTED] Sent: Saturday, November 01, 2008 11:28 PM To: time-nuts time-nuts@febo.com Subject: [time-nuts] Jackson Labs Fury Isotemp OCXO134-10 I think that I've managed to keep a low profile here, trusting that I would learn more if I refrained from random interjections of ill-informed thoughts. However, there comes a point in every man's life... A year or two ago, I took advantage of Said's offer and purchased one of the Jackson Labs OEM external OCXO Fury units and am attempting to put it to work. I've decided to use an Isotemp OCXO134-10 oscillator and have several decisions which I would like to vet with those of you that have been down this road before. The Isotemp unit has an EFC range of 0 to 8 Volts; the Fury has an EFC range of 0 to 5 volts. Using my HP 53131A, I'm able to adjust the Isotemp to 10 MHz +- 5 mHz with an EFC voltage of 4.64 volts. That is within the adjustment range of the Fury, but I'm not sure of the accuracy of the HP53131A. Should I construct a resistive network ala Brooks Shera to 'boost' the EFC range just in case or would I be better off just using the Fury 'as is'? Secondly, the Jackson Labs advises that since the Fury uses the external oscillator as its clock, that the oscillator should be powered up before the Fury itself. I was hoping that I would be able to use a single power switch to power both the oscillator and the Fury simultaneously, but now I'm not so sure. Finally, are there any of you that have used the Isotemp OXCO134-10 with the Fury? Have any of you worked out the various SERVO settings that the Fury makes available? I'm interested in the DAC gain, EFC scale, EFC dampening and Phase compensation. Any and all advice will be gratefully accepted. -- kc0ukk at msosborn dot com ___ 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.
Re: [time-nuts] DIY Loran-C frequency receiver: release 0.0
A number of time-nuts have indicated that they want in on this crazy little project of mine, so I have slapped together a release 0.0 of my software, and a paper that goes with it: The paper: http://phk.freebsd.dk/AducLoran/AducLoran-0.0.pdf The software: http://phk.freebsd.dk/AducLoran/AducLoran-0.0.tgz Loran-C does not get any simpler than this... Have fun! Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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] What's the time Mr Wolf...
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Rooke Sent: Thursday, 30 October 2008 11:16 PM 10) If they are geostationary, or move in relation to the ground, how are the affects of the Einstein time dilation handled as they may be travelling at a different speed than a point on the surface of the Earth? Internally, the GPS satellites have an approximately 10.23 MHz oscillator which is: 1. multiplied by 120 to generate the L2 carrier (1227.6 MHz), 2. multiplied by 154 to generate the L1 carrier (1575.42 MHz), 2a. Multiplied by 115 to generate the L5 carrier (1176.45 MHz, Block III sats only) 3. passed directly to the P(Y) code generator (10.23 MHz symbol rate) 4. divided by 10 to generate the C/A code (1.023 MHz symbol rate), and 5. divided by 20460 to generate the data (50 Hz bit rate). So everything is derived from this oscillator, which is actually 10.2299543 MHz. This -4.57 mHz corrects for relativistic effects. Sam. Disclaimer : The contents of this e-mail including any attachments are intended only for the person or entity to which this e-mail is addressed. If you are not, or believe you may not be, the intended recipient, please advise the sender immediately by return e-mail, delete this e-mail and destroy any copies. The Company does not warrant nor guarantee that this email communication is free from errors, virus, interception or interference. ___ 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] Testing frequency using NTP
Poul-Henning Kamp wrote: #-- Actually, the best hardware for the job is the Soekris NET4501 which can timestamp a signal to a quarter microsecond. That's why we use it for NTP servers in the first place. All the software you need is in the FreeBSD kernel, and there is a handy userland program to get the measurments into ascii format (the earlier mentioned ppsapitest program). -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk at FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. #-- I am familiar with your articles relating to the use of the Soekris NET4501 and its characterization when used with FreeBSD for timing purposes. I am fortunate to have one on hand, but have some questions. Can I still expect to see similar performance using more recent versions of FreeBSD than you originally used? Will a usable build of FreeBSD 7.x run in the memory available on the older Soekris boards? (64 MB RAM) I understand that there are features that made boards incorporating the 133 MHz AMD ElanSC520 processors suitable for this purpose. Are these features still present in the newer AMD Geode LX based boards? Though I know that you have worked with Soekris products a lot, is there any reason that the same techniques cannot be applied to the WRAP and ALIX boards from PCEngines? or perhaps an One Laptop Per Child (OLPC) XO? I would appreciate any information that you can provide me. Dave Witten ___ 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] Rb lamp lifetime...
How much would be reasonable to pay for one of these on EBay? I see someone asking $259 for one. I'm sure that TAPR's price was much better, but I wasn't paying attention. Dave Witten WB6BNQ wrote: Yuri, Sorry about that, but I guess the Trimble Thunderbolts are out of stock all ready. BillWB6BNQ WB6BNQ wrote: Hi Yuri, Unless you need the longer term stability of an undisciplined Rb source, I think you would be better served to get one of the “Timenuts group” Trimble Thunderbolt GPS units to use as a home standard. It is available via this page: ___ 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] Jackson Labs Fury Isotemp OCXO134-10
Hello Matt, let me try to answer some of your questions about the Fury with an Isotemp-134. First I tried finding a datasheet for it, but Isotemp removed it from their website. All I could find was that it has about 5ppb -30 to +60C stability. So it's performance is between our JLT standard single oven and double oven OCXO's. Not knowing the EFC sensitivity of the unit, I will give you some servo settings to try out and play with. On the power up issues, you can try to run both the OCXO and the Fury from the same power supply. If the OCXO does not provide a stable 10MHz before the Fury comes out of reset then it won't boot up. So if you try power cycling say 5 to 10 times and it always comes up (LED's turn on for several seconds) then you are good to go. If it is marginal, then you may have to delay the Fury power as some have suggested here. Or simply press the reset button after power on (I presume you won't power cycle the unit very often when in operation, so pressing reset after power on may work for you if the unit does not boot). On the EFC range, this depends on the aging and thermal sensitivity of the OCXO. 4.64V is still quite a ways below 5V, but it's getting to the edge of the Fury range. There is no reason that it should not work, even if you go up to 4.8V or so due to aging etc. If the unit ages downward (EFC voltage decreasing over time) then I would not worry. I would only add external circuitry to increase the EFC range if absolutely necessary, since any circuitry you will add will probably add noise. Now on the servo settings, try the following: * Slope polarity: depends on the OCXO. If frequency goes up with increased EFC voltage, then set it to positive. You can try changing the coarsedac up and down to see the slope of your OCXO (use the command serv:coarsedac x where x is 0 to 255. Higher values result in higher efc voltage. * For this type of thermal stability, I would try a servo:efcs setting of about 2 to 4 * Try damping of 30. This value is not really that critical, any value will work that does not cause oscillation. Higher values result in slower sawtooth filters and thus less noise * Phaseco: try values of 15 to 25 and see how fast the unit pushes the phase offset to 0ns. If its too slow for you, increase this value, but not to the point where it oscillates. * DAC gain: this depends on the OCXO EFC sensitivity. If it is a standard -20Hz to +20Hz over 0V to 5V then a value of 15 seems to work well. If your unit locks up without overshoot/oscillation within 30 minutes with these settings then you are doing well, and can fine-tune the parameters from there. Hope this helps, bye, Said From: Matt Osborn [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) Date: November 1, 2008 23:28:34 PDT To: time-nuts [EMAIL PROTECTED] (mailto:time-nuts@febo.com) Subject: [time-nuts] Jackson Labs Fury Isotemp OCXO134-10 Reply-To: Discussion of precise time and frequency measurement [EMAIL PROTECTED] (mailto:time-nuts@febo.com) I think that I've managed to keep a low profile here, trusting that I would learn more if I refrained from random interjections of ill-informed thoughts. However, there comes a point in every man's life... A year or two ago, I took advantage of Said's offer and purchased one of the Jackson Labs OEM external OCXO Fury units and am attempting to put it to work. I've decided to use an Isotemp OCXO134-10 oscillator and have several decisions which I would like to vet with those of you that have been down this road before. The Isotemp unit has an EFC range of 0 to 8 Volts; the Fury has an EFC range of 0 to 5 volts. Using my HP 53131A, I'm able to adjust the Isotemp to 10 MHz +- 5 mHz with an EFC voltage of 4.64 volts. That is within the adjustment range of the Fury, but I'm not sure of the accuracy of the HP53131A. Should I construct a resistive network ala Brooks Shera to 'boost' the EFC range just in case or would I be better off just using the Fury 'as is'? Secondly, the Jackson Labs advises that since the Fury uses the external oscillator as its clock, that the oscillator should be powered up before the Fury itself. I was hoping that I would be able to use a single power switch to power both the oscillator and the Fury simultaneously, but now I'm not so sure. Finally, are there any of you that have used the Isotemp OXCO134-10 with the Fury? Have any of you worked out the various SERVO settings that the Fury makes available? I'm interested in the DAC gain, EFC scale, EFC dampening and Phase compensation. Any and all advice will be gratefully accepted. -- kc0ukk at msosborn dot com ___ time-nuts mailing list -- [EMAIL PROTECTED] (mailto:time-nuts@febo.com) To unsubscribe, go to _https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts_
Re: [time-nuts] Testing frequency using NTP
In message: [EMAIL PROTECTED] David M. Witten II [EMAIL PROTECTED] writes: : Will a usable build of FreeBSD 7.x run in the memory available on the : older Soekris boards? (64 MB RAM) No. My router/dhcp server, mail forwarding anti-spam agent, external DNS server are all on my soekris 4521. I'm running 7.0 on it. It only has 64MB of memory and I've never had memory problems. Warner ___ 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] Testing frequency using NTP
In message: [EMAIL PROTECTED] M. Warner Losh [EMAIL PROTECTED] writes: : In message: [EMAIL PROTECTED] : David M. Witten II [EMAIL PROTECTED] writes: : : Will a usable build of FreeBSD 7.x run in the memory available on the : : older Soekris boards? (64 MB RAM) : : No. My router/dhcp server, mail forwarding anti-spam agent, external : DNS server are all on my soekris 4521. I'm running 7.0 on it. It : only has 64MB of memory and I've never had memory problems. Errr, I should have said 'Yes.' My no was answering the question 'Will it run out of memory?' %vmstat procs memory page disk faults cpu r b w avmfre flt re pi po fr sr ad0 in sy cs us sy id 0 0 0 38492 225762 0 0 0 1 0 0 1354 25 488 1 3 96 Warner ___ 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] Jackson Labs Fury Isotemp OCXO134-10
Hi Bill, thanks for sending the datasheets. Looks like the unit has nominally +/-6Hz EFC range, slightly less than the OCXO's we typically use. I would thus try increasing the DAC Gain to about 30 to 40 and see how that works. bye, Said In a message dated 11/2/2008 18:06:18 Pacific Standard Time, [EMAIL PROTECTED] writes: Said, Find attached two PDF files of the specs, drawing and pinout for the Isotemp 134-10. BillWB6BNQ ___ 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.
