Re: Off Topic : What is the 10 second accuracy of a Trimble 57963-D GPSDO?
Hello Carsten. Interesting that you say that it`s the OXCO that is the determining factor, not ,for example, the number of satellites aquired, or something else. I shall store that snippet of information away:-). The OXCO in my unit [ I wish the builder had given it a model number] has TPN : 57964-80, this might mean Trimble Part No 57964-80,? "Sec Code: EP92-01321 H", and " D/C: 10/06 ". These codes are on a label stuck on the OXCO, by the Chinese builder, so He/She/They must have considered this important. The label that Trimble stuck on the OXCO states P/N 73090, serial number 468010-0114, and date code 0950. From this I guess that the Trimble PCB was manufactured in 1995, and the unit assembled in Oct 2006. Do you have the gen on this OXCO Carsen?, and hoping the foregoing information is of interest to you. No, I haven`t used Lady Heather to look at this unit, as I`m not sure how to connect the RS232 9-pin "D" connector to my computer [It has TxD, and RxD, and little else] . Wishing you well...................................................................................................................................................................................................................................................Donald.
On Thu, Oct 11, 2018 at 7:44 PM Carsten Bormann < cabocabo@...> wrote: For 10 s, that depends almost entirely on the OXCO in there.? You may find more info about that.? Which one do you have?
Did you try looking at it with a tool called ¡°Lady Heather¡±?? This one is amazing.
Gr¨¹?e, Carsten
|
Re: Off Topic : What is the 10 second accuracy of a Trimble 57963-D GPSDO?
For 10 s, that depends almost entirely on the OXCO in there. You may find more info about that. Which one do you have?
Did you try looking at it with a tool called ¡°Lady Heather¡±? This one is amazing.
Gr¨¹?e, Carsten
|
Peter, can you post a picture and/or PN of that bad YTO? I can actually recall at least three YTOs that were used in the 8970. The last version is a small one, Agilent standardized on that YTO for almost all their products. The earlier ones are much bigger.
Vladan
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Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
That's usually the function of the bid size.
toggle quoted message
Show quoted text
On 10/10/2018 8:48 PM, Artekmedia wrote: Why?
Begs the question then of who gets to play supreme deity and decide who is "more worthy"
Dave
manuals@...
On 10/10/2018 8:43 PM, Dr. David Kirkby from Kirkby Microwave Ltd wrote:
On Wed, 10 Oct 2018, 22:37 bownes, <bownes@... <mailto:bownes@...>> wrote:
??? The trick on that one is not bidding against a fellow volt-nut. :)
It would be nice if volt-nuts and time-nuts could come up with a way so they don't bid against each other.
|
Off Topic : What is the 10 second accuracy of a Trimble 57963-D GPSDO?
I`m hoping that there are members of this group who utliise the above serial number Trimble PCB as a frequency substandard for their H/P equipment, and know the accuracy that can be expected from this little unit, over a 10 second interval. (I`m guessing better than one part in 10^10) Has any group member the Trimble specification for this? Or, has anyone measured the Trimble 57963-D to find out? I`m assuming that this is not sensitive information from a defense point of view - please correct me if I am wrong. The GPSDO unit I have, was sourced from a supplier in China for about US$150, and has the 57963-D board , which is designed in the USA [it says so on the board], and two other PCB`s - one has the power supplies on it, and the other the output buffer amplifiers. These boards are apparently designed and built in China, and are nicely built, too. Can anybody wax eloquently on this topic? I don`t have the equipment to measure this reference, and would like to know just what I`ve got. The supplier could not supply information in English, and I have, so far ,been unable to find the 57963-D board specification on the Trimble website. This information may be of interest to others, who have purchased one or more of these units. Thankyou, in anticipation,..........................................................................................................................................................................................................................Donald Brett Collie [ZL4GX]?
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Re: Missing button cover on HP network analyzer.
Yep.
On 2018-10-11 5:02 AM, Pete Manfre
wrote:
toggle quoted message
Show quoted text
Are you talking about the soft key cover??
On Wed, Oct 10, 2018, 10:00 PM Razvan < razvan@...>
wrote:
The cover itself, it goes over all the buttons.
On
2018-10-11 4:52 AM, Pete Manfre wrote:
Which button??
On Wed, Oct 10, 2018, 9:48 PM Razvan < razvan@...>
wrote:
Hey
guys,
I'm missing the button cover on my HP 8752C. I know
I'm not the only one
with this issue and I know they're close to impossible
to find.
Is anyone willing to measure it and take some photos
from above, side,
etc, so I can model it in a 3D program? I would then
share the design
and everyone missing it, can print it.
Perhaps a volunteer with two network analyzers, one
with a missing
button cover?
Razvan
|
Re: Missing button cover on HP network analyzer.
Are you talking about the soft key cover??
On Wed, Oct 10, 2018, 10:00 PM Razvan < razvan@...> wrote:
The cover itself, it goes over all the buttons.
On 2018-10-11 4:52 AM, Pete Manfre
wrote:
Which button??
On Wed, Oct 10, 2018, 9:48 PM Razvan < razvan@...>
wrote:
Hey guys,
I'm missing the button cover on my HP 8752C. I know I'm not
the only one
with this issue and I know they're close to impossible to
find.
Is anyone willing to measure it and take some photos from
above, side,
etc, so I can model it in a 3D program? I would then share the
design
and everyone missing it, can print it.
Perhaps a volunteer with two network analyzers, one with a
missing
button cover?
Razvan
|
Re: Missing button cover on HP network analyzer.
I just realized I wasn't specific enough, sorry for that, but I
hope the image I attached cleared up any confusions.
On 2018-10-11 5:00 AM, Razvan wrote:
toggle quoted message
Show quoted text
The cover itself, it goes over all the buttons.
On 2018-10-11 4:52 AM, Pete Manfre
wrote:
Which button??
On Wed, Oct 10, 2018, 9:48 PM Razvan < razvan@...>
wrote:
Hey guys,
I'm missing the button cover on my HP 8752C. I know I'm not
the only one
with this issue and I know they're close to impossible to
find.
Is anyone willing to measure it and take some photos from
above, side,
etc, so I can model it in a 3D program? I would then share
the design
and everyone missing it, can print it.
Perhaps a volunteer with two network analyzers, one with a
missing
button cover?
Razvan
|
Re: Missing button cover on HP network analyzer.
The cover itself, it goes over all the buttons.
On 2018-10-11 4:52 AM, Pete Manfre
wrote:
toggle quoted message
Show quoted text
Which button??
On Wed, Oct 10, 2018, 9:48 PM Razvan < razvan@...>
wrote:
Hey guys,
I'm missing the button cover on my HP 8752C. I know I'm not
the only one
with this issue and I know they're close to impossible to
find.
Is anyone willing to measure it and take some photos from
above, side,
etc, so I can model it in a 3D program? I would then share the
design
and everyone missing it, can print it.
Perhaps a volunteer with two network analyzers, one with a
missing
button cover?
Razvan
|
Son of a gun. The unit is working!
toggle quoted message
Show quoted text
On Oct 10, 2018, at 9:39 PM, Pete Manfre < pmanfre@...> wrote: E80¡ memory loss.? ?Replace battery and do an if Cal (11.1 SF I think¡ one of the SF's anyway)? 15 dB enr ns must be attached.... All will be well.?
Pete wa2odo On Wed, Oct 10, 2018, 9:36 PM Peter Gottlieb < hpnpilot@...> wrote: The first unit with the defunct VTO is 3713U05470 and the second opt 020 unit is
3619U04475.
I mentioned the control boards were coated with goo from the melted robber
bumpers (side note, there are some bumpers on top assemblies and those were not
melted but I am going to replace those soon).? I tried powering the unit up
after removing the goo and it runs.
I am not familiar with this unit so need to read the manual but it first comes
up with E 80.? I press Instr Preset and it says FR CAL then goes to 30 MHz and E
26 and the uncorrected light is on.? I press Calibrate (twice) and the unit
steps from 10 to 1600 MHz (why not 2048 MHz?) three times and then back to 30
MHz and now E 27.
The memory backup battery was dead and I replaced it.? I also tried doing the
same thing with a 15 dB noise source connected but the same results.
Question:? Is this normal and I don't know how to operate the unit or is
something wrong that I need to track down?
Peter
On 10/10/2018 2:37 PM, Artekmedia wrote:
> serial number prefixes for the two???
>
>
>
> On 10/10/2018 2:26 PM, Peter Gottlieb wrote:
>> A while ago I bought a 8970B noise figure meter but never got it running due
>> to a bad YTO. Recently, thinking it would be interesting to play with, I
>> bought another for parts, figuring I would make one good one.
>>
>> To my surprise, internally they are quite different!? The YTO in the second
>> one is completely different, with an entirely different frequency range.
>> Hmmm, that¡¯s interesting...
>>
>> It turns out that the second unit has option 20, meaning it can go to 2 GHz.
>> I am amazed how different these units are internally!
>>
>> In any case the initial problem in the second unit appears to be in the
>> controller which usually doesn¡¯t run at all. Or maybe power supply, I haven¡¯t
>> dug into it. The unit was dropped hard at one point in its life as the back
>> panel where the transformer is mounted is bent so I¡¯m going to look for a
>> mechanical cause for the problems and instead of looking to fix the first
>> unit concentrate on the option 20 one. Hopefully the YTO wasn¡¯t damaged in
>> the drop.
>>
>> It is just interesting to me that the slight increase in the top end
>> frequency required such massive RF system changes.
>>
>>
>> Peter
>>
>>
>>
>
|
Re: Missing button cover on HP network analyzer.
toggle quoted message
Show quoted text
On Wed, Oct 10, 2018, 9:48 PM Razvan < razvan@...> wrote: Hey guys,
I'm missing the button cover on my HP 8752C. I know I'm not the only one
with this issue and I know they're close to impossible to find.
Is anyone willing to measure it and take some photos from above, side,
etc, so I can model it in a 3D program? I would then share the design
and everyone missing it, can print it.
Perhaps a volunteer with two network analyzers, one with a missing
button cover?
Razvan
|
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
Google "bidder collusion"
|
Missing button cover on HP network analyzer.
Hey guys,
I'm missing the button cover on my HP 8752C. I know I'm not the only one with this issue and I know they're close to impossible to find.
Is anyone willing to measure it and take some photos from above, side, etc, so I can model it in a 3D program? I would then share the design and everyone missing it, can print it.
Perhaps a volunteer with two network analyzers, one with a missing button cover?
Razvan
|
Re: HP 141T sn:1850A 16959, hp: 8556A sn: 1907A 04190 and hp 8552B sn:1841B sn:1841A15130
Resistors can be bought from Digikey, Mouser and others.
toggle quoted message
Show quoted text
On 10/10/2018 8:07 PM, George Fridrich via Groups.Io wrote: Just saved the 141T from the dumpster, powered unit up and got no initial signal on Scope, found 1/4 amp fuse open, put fuse in, brought unit up without modules in and fuse did not blow, inspected both 855 units, found 8552B had a burnt component smell, removed A7 board and found R7 burned badly! ?Q2,3,4,6,712 & 18 ?open ( not working). I down loaded some manuals, I want to check voltages before repairing the board, not sure where the voltage test points are on the 141T, drawings are not very good. I would like to find replacement transistors & were to find R7 131ohm 1% resistor 1/8 watt. I would like to bring it back to life, it is so well made, a work of art! Any help would be appreciated.
Sent from Yahoo Mail for iPad <>
|
toggle quoted message
Show quoted text
On Wed, Oct 10, 2018, 9:40 PM Pete Manfre < pmanfre@...> wrote: E80¡ memory loss.? ?Replace battery and do an if Cal (11.1 SF I think¡ one of the SF's anyway)? 15 dB enr ns must be attached.... All will be well.?
Pete wa2odo
On Wed, Oct 10, 2018, 9:36 PM Peter Gottlieb < hpnpilot@...> wrote: The first unit with the defunct VTO is 3713U05470 and the second opt 020 unit is
3619U04475.
I mentioned the control boards were coated with goo from the melted robber
bumpers (side note, there are some bumpers on top assemblies and those were not
melted but I am going to replace those soon).? I tried powering the unit up
after removing the goo and it runs.
I am not familiar with this unit so need to read the manual but it first comes
up with E 80.? I press Instr Preset and it says FR CAL then goes to 30 MHz and E
26 and the uncorrected light is on.? I press Calibrate (twice) and the unit
steps from 10 to 1600 MHz (why not 2048 MHz?) three times and then back to 30
MHz and now E 27.
The memory backup battery was dead and I replaced it.? I also tried doing the
same thing with a 15 dB noise source connected but the same results.
Question:? Is this normal and I don't know how to operate the unit or is
something wrong that I need to track down?
Peter
On 10/10/2018 2:37 PM, Artekmedia wrote:
> serial number prefixes for the two???
>
>
>
> On 10/10/2018 2:26 PM, Peter Gottlieb wrote:
>> A while ago I bought a 8970B noise figure meter but never got it running due
>> to a bad YTO. Recently, thinking it would be interesting to play with, I
>> bought another for parts, figuring I would make one good one.
>>
>> To my surprise, internally they are quite different!? The YTO in the second
>> one is completely different, with an entirely different frequency range.
>> Hmmm, that¡¯s interesting...
>>
>> It turns out that the second unit has option 20, meaning it can go to 2 GHz.
>> I am amazed how different these units are internally!
>>
>> In any case the initial problem in the second unit appears to be in the
>> controller which usually doesn¡¯t run at all. Or maybe power supply, I haven¡¯t
>> dug into it. The unit was dropped hard at one point in its life as the back
>> panel where the transformer is mounted is bent so I¡¯m going to look for a
>> mechanical cause for the problems and instead of looking to fix the first
>> unit concentrate on the option 20 one. Hopefully the YTO wasn¡¯t damaged in
>> the drop.
>>
>> It is just interesting to me that the slight increase in the top end
>> frequency required such massive RF system changes.
>>
>>
>> Peter
>>
>>
>>
>
|
E80¡ memory loss.? ?Replace battery and do an if Cal (11.1 SF I think¡ one of the SF's anyway)? 15 dB enr ns must be attached.... All will be well.?
Pete wa2odo
On Wed, Oct 10, 2018, 9:36 PM Peter Gottlieb < hpnpilot@...> wrote: The first unit with the defunct VTO is 3713U05470 and the second opt 020 unit is
3619U04475.
I mentioned the control boards were coated with goo from the melted robber
bumpers (side note, there are some bumpers on top assemblies and those were not
melted but I am going to replace those soon).? I tried powering the unit up
after removing the goo and it runs.
I am not familiar with this unit so need to read the manual but it first comes
up with E 80.? I press Instr Preset and it says FR CAL then goes to 30 MHz and E
26 and the uncorrected light is on.? I press Calibrate (twice) and the unit
steps from 10 to 1600 MHz (why not 2048 MHz?) three times and then back to 30
MHz and now E 27.
The memory backup battery was dead and I replaced it.? I also tried doing the
same thing with a 15 dB noise source connected but the same results.
Question:? Is this normal and I don't know how to operate the unit or is
something wrong that I need to track down?
Peter
On 10/10/2018 2:37 PM, Artekmedia wrote:
> serial number prefixes for the two???
>
>
>
> On 10/10/2018 2:26 PM, Peter Gottlieb wrote:
>> A while ago I bought a 8970B noise figure meter but never got it running due
>> to a bad YTO. Recently, thinking it would be interesting to play with, I
>> bought another for parts, figuring I would make one good one.
>>
>> To my surprise, internally they are quite different!? The YTO in the second
>> one is completely different, with an entirely different frequency range.
>> Hmmm, that¡¯s interesting...
>>
>> It turns out that the second unit has option 20, meaning it can go to 2 GHz.
>> I am amazed how different these units are internally!
>>
>> In any case the initial problem in the second unit appears to be in the
>> controller which usually doesn¡¯t run at all. Or maybe power supply, I haven¡¯t
>> dug into it. The unit was dropped hard at one point in its life as the back
>> panel where the transformer is mounted is bent so I¡¯m going to look for a
>> mechanical cause for the problems and instead of looking to fix the first
>> unit concentrate on the option 20 one. Hopefully the YTO wasn¡¯t damaged in
>> the drop.
>>
>> It is just interesting to me that the slight increase in the top end
>> frequency required such massive RF system changes.
>>
>>
>> Peter
>>
>>
>>
>
|
Do you happen to know which 8350 plug in uses that VTO?
toggle quoted message
Show quoted text
On 10/10/2018 4:45 PM, pianovt via Groups.Io wrote: Peter,
There is a business reason the two meters have such different RF hardware. The original design was based on the 8558 spectrum analyzer plugin. That plugin was already quite old by the time the 8970A came out. Noise figure meters are a very small market, so the meter had to use parts from something that's made in higher volume. As a result, the later 8970s used some hardware out of the 8590 series spectrum analyzers. At the same time, the frequency range was extended because it was easy to do with the parts out of the 2.9 GHz spectrum analyzers.
The YTO in the old units is the very common 2-4GHz oscillator from the 8558, 8568, and some 8350 sweeper plug-ins. You should be able to find one that is similar enough. Also, unlike the EYO oscillator, those old ones don't break often. They can be found.
Once you get the thing(s) running, check the backup battery. If it runs low, you will see some error codes and lose some calibration data.
Vladan
|
The first unit with the defunct VTO is 3713U05470 and the second opt 020 unit is 3619U04475.
I mentioned the control boards were coated with goo from the melted robber bumpers (side note, there are some bumpers on top assemblies and those were not melted but I am going to replace those soon).? I tried powering the unit up after removing the goo and it runs.
I am not familiar with this unit so need to read the manual but it first comes up with E 80.? I press Instr Preset and it says FR CAL then goes to 30 MHz and E 26 and the uncorrected light is on.? I press Calibrate (twice) and the unit steps from 10 to 1600 MHz (why not 2048 MHz?) three times and then back to 30 MHz and now E 27.
The memory backup battery was dead and I replaced it.? I also tried doing the same thing with a 15 dB noise source connected but the same results.
Question:? Is this normal and I don't know how to operate the unit or is something wrong that I need to track down?
Peter
toggle quoted message
Show quoted text
On 10/10/2018 2:37 PM, Artekmedia wrote: serial number prefixes for the two???
On 10/10/2018 2:26 PM, Peter Gottlieb wrote:
A while ago I bought a 8970B noise figure meter but never got it running due to a bad YTO. Recently, thinking it would be interesting to play with, I bought another for parts, figuring I would make one good one.
To my surprise, internally they are quite different!? The YTO in the second one is completely different, with an entirely different frequency range. Hmmm, that¡¯s interesting...
It turns out that the second unit has option 20, meaning it can go to 2 GHz. I am amazed how different these units are internally!
In any case the initial problem in the second unit appears to be in the controller which usually doesn¡¯t run at all. Or maybe power supply, I haven¡¯t dug into it. The unit was dropped hard at one point in its life as the back panel where the transformer is mounted is bent so I¡¯m going to look for a mechanical cause for the problems and instead of looking to fix the first unit concentrate on the option 20 one. Hopefully the YTO wasn¡¯t damaged in the drop.
It is just interesting to me that the slight increase in the top end frequency required such massive RF system changes.
Peter
|
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
Dr. David Kirkby from Kirkby Microwave Ltd
On Thu, 11 Oct 2018, 01:48 Artekmedia, < manuals@...> wrote: Why?
Begs the question then of who gets to play supreme deity and decide who
is "more worthy"
Dave
manuals@...
Well, let's say I am willing to pay up to ?3000, and another volt-nut up to ?3200.?
He places the bid, and I don't bid against them. Had we both bid, the other volt-nut would have still won, but instead of paying ?3050 (assuming bid increment is ?50), they would pay less as I am not pushing the price up.?
But there are problems with that. If another volt-nut is selling, and knows someone is going to place a ?3000 bid, there is every incentive to get a friend place a bid? of ?2950.?
Dave
|
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
Unfortunately for this forum, I will have to say time-nuts. The second is a fundamental unit of measurement and the volt is not. Now, if you consider amp-nuts, they would be on equal footing.
Regards,
Mark
On Wed, Oct 10, 2018 at 5:48 PM Artekmedia < manuals@...> wrote: Why?
Begs the question then of who gets to play supreme deity and decide who
is "more worthy"
Dave
manuals@...
On 10/10/2018 8:43 PM, Dr. David Kirkby from Kirkby Microwave Ltd wrote:
> On Wed, 10 Oct 2018, 22:37 bownes, <bownes@...
> <mailto:bownes@...>> wrote:
>
>? ? ?The trick on that one is not bidding against a fellow volt-nut. :)
>
>
> It would be nice if volt-nuts and time-nuts could come up with a way
> so they don't bid against each other.
>
>
--
Dave
Manuals@...
|
