[time-nuts] HP E1938A Oscillator settings
Folks, I recently powered up an E1938 oscillator, and connected NGOComm to examine its inner workings. The oven had been set to 75dC (fixed using the ramp function), and I'd like to check all of the other settings in case these have been changed as well. Can anyone enlighten me? I'd like to understand the red and blue settings, the default PID parameters and the rim/mass ratio controls. Thanks, david ___ 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 E1938A Oscillator
List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier ___ 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] HP E1938A Oscillator
Hi Perry, On 07/05/2013 07:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Don't get the puck only. Pulling it from the board with all it's support functions, including oven controller etc. was a bad move. Do look at the material online to see what I mean. Cheers, Magnus ___ 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] HP E1938A Oscillator
Start by taking a look here: http://www.leapsecond.com/museum/e1938a/ On Fri, Jul 5, 2013 at 7:23 AM, Perry Sandeen sandee...@yahoo.com wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier ___ 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] HP E1938A Oscillator
Magnus Danielson wrote: Hi Perry, On 07/05/2013 07:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Don't get the puck only. Pulling it from the board with all it's support functions, including oven controller etc. was a bad move. Do look at the material online to see what I mean. Cheers, Magnus ___ 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. However the pucks can be a useful replacement when an E1938A oscillator fails as one of mine did. 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] HP E1938A Oscillator
Perrier, I think that I would take a well-working 10811 over the E1938A. I've got a handful of both, one even came inside a Z3815A and all of the 10811 units are better than all of the 1938's for unknown reasons. The 1938A is quite a bit more stable over temp in general though I think, but thats offset by its typical crystal jumps. In fact the E1938A inside the Z3815A I have is a disaster in terms of stability, phase noise, and spurs when compared to all of my 10811 driven Z3805A units. That is very likely mostly caused by the much poorer design of the Z3815A when compared to the Z3805A. Bye, Said On Jul 4, 2013, at 22:23, Perry Sandeen sandee...@yahoo.com wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier ___ 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] HP E1938A Oscillator
On 7/5/2013 3:00 AM, Bruce Griffiths wrote: Magnus Danielson wrote: Hi Perry, On 07/05/2013 07:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Don't get the puck only. Pulling it from the board with all it's support functions, including oven controller etc. was a bad move. Do look at the material online to see what I mean. Cheers, Magnus However the pucks can be a useful replacement when an E1938A oscillator fails as one of mine did. I noticed that the circuit board and the puck are labelled with each other's serial number and that various pucks are labelled with significantly different temperature values. When you change pucks or boards do you have to adjust or reprogram the board to match the new puck? Ed ___ 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] HP E1938A Oscillator
Maybe the supporting board of the E1938A stores calibration constants... On Fri, Jul 5, 2013 at 11:00 AM, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote: Magnus Danielson wrote: Hi Perry, On 07/05/2013 07:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Don't get the puck only. Pulling it from the board with all it's support functions, including oven controller etc. was a bad move. Do look at the material online to see what I mean. Cheers, Magnus ___ 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. However the pucks can be a useful replacement when an E1938A oscillator fails as one of mine did. 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. ___ 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] HP E1938A Oscillator
Hi Perry, I have had good dealing with Tommy Chou, if anything is broken he will replace it. But, the E1938's are a bit expensive at the moment. I am going out on a limb here but the E1938 is about the nicest OCXO I have come across. Probably some of the more recent stuff would be on par, but the E1938 are pretty darn nice. There is also some control software for the E1938 on PCR88.com. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Perry Sandeen Sent: Friday, 5 July 2013 3:24 PM To: time-nuts@febo.com Subject: [time-nuts] HP E1938A Oscillator List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier ___ 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] HP E1938A Oscillator
On 7/5/2013 12:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier The E1938A is a microprocessor controlled and managed oscillator. Probably with a lot of control/correction/compensation data stored on the processor board. Does anyone have any interface (I/O) definitions for the stainless steel oscillator module? For the processor control board? Instructions on how to calibrate and compensate it? My impression is that it is a lot easier for an experimenter to manage an HP10811 oscillator where you just put power on it and a signal comes out. Thanks, --- Graham / KE9H == ___ 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] HP E1938A Oscillator
Go here My Friend: http://www.prc68.com/I/HPE1938.shtml There is even the schematic and control/calibration software for the E1938 This is Brooke Clarks most excellent site. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Graham / KE9H Sent: Friday, 5 July 2013 11:05 PM To: time-nuts@febo.com Subject: Re: [time-nuts] HP E1938A Oscillator On 7/5/2013 12:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier The E1938A is a microprocessor controlled and managed oscillator. Probably with a lot of control/correction/compensation data stored on the processor board. Does anyone have any interface (I/O) definitions for the stainless steel oscillator module? For the processor control board? Instructions on how to calibrate and compensate it? My impression is that it is a lot easier for an experimenter to manage an HP10811 oscillator where you just put power on it and a signal comes out. Thanks, --- Graham / KE9H == ___ 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] HP E1938A Oscillator
Graham, the answer is here: http://www.prc68.com/I/HPE1938.shtml I strongly recommend to read Rick's publications. And, there is a control software for changing control parameters etc. The other link which has been posted before: http://www.leapsecond.com/museum/e1938a/ It includes a connector diagram. Regards, Adrian Graham / KE9H schrieb: On 7/5/2013 12:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier The E1938A is a microprocessor controlled and managed oscillator. Probably with a lot of control/correction/compensation data stored on the processor board. Does anyone have any interface (I/O) definitions for the stainless steel oscillator module? For the processor control board? Instructions on how to calibrate and compensate it? My impression is that it is a lot easier for an experimenter to manage an HP10811 oscillator where you just put power on it and a signal comes out. Thanks, --- Graham / KE9H == ___ 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] HP E1938A Oscillator
There is a control program: http://www.prc68.com/I/pdf/NGOcomm.zip on the E1938A page at: http://www.prc68.com/I/HPE1938.shtml On Fri, Jul 5, 2013 at 3:05 PM, Graham / KE9H time...@austin.rr.com wrote: On 7/5/2013 12:23 AM, Perry Sandeen wrote: List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier The E1938A is a microprocessor controlled and managed oscillator. Probably with a lot of control/correction/compensation data stored on the processor board. Does anyone have any interface (I/O) definitions for the stainless steel oscillator module? For the processor control board? Instructions on how to calibrate and compensate it? My impression is that it is a lot easier for an experimenter to manage an HP10811 oscillator where you just put power on it and a signal comes out. Thanks, --- Graham / KE9H == ___ 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] HP E1938A Oscillator
Hi Bruce, On 07/05/2013 11:00 AM, Bruce Griffiths wrote: However the pucks can be a useful replacement when an E1938A oscillator fails as one of mine did. Indeed. But seeing them both rated at 100 USD, I rather recommending buying the full E1938A than just the puck by itself. Cheers, Magnus ___ 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.
