Re: 8510C 85102A IF/DETECTOR L.O. Phaselock Out Upgrade / Option ?
Hi Kevin,
at my 8510C there's also such an output. Mine looks quite original to me, and my unit was Agilent-cal-sealed, when I got it.
Maybe somebody did brake the original BNC (it is fully isolated from the case -> see picture) on yours and they bodged something together?
As you see, I did not connect it to anything (83620-Source).
73 Martin, DL8RI
Am So., 24. M?rz 2019 um 15:18?Uhr schrieb Kevin Hobbs < ve3kh@...>:
Hi 8510 Experts
I am piecing together an 8510C System ... the 85102A IF/DETECTOR has a BNC cable hanging out of an added rear panel hole with a label that says "L.O. Phaselock Out"? ... Does anyone recall an upgrade or Option like this and how it connects to the rest of the system etc?
Any wisdom appreciated !
73 Kevin
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Re: NVRAM 28-Pin Encapsulated Package DS1230Y and 6811B
I couldn't agree more!?? I've had *terrible* experiences with alkaline cells leaking.
Daun
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On 3/24/2019 10:25 AM, Chuck Harris wrote: I suggest in the strongest terms, do NOT use alkaline
cells in any memory backup scheme. They will leak out
their electrolyte long before they run out the necessary
power to run the backup scheme.
I have done this experiment too many times, and lost too
much equipment to the damage the alkaline cells have done.
If you simply must use alkalines, put them on a long leash
and mount them outside of the instrument.
-Chuck Harris
Jack2015 wrote:
Usually there are three parts in a NVRAM,
1.SRAM
2.DS1210(or DS121x?)
3. 3V battery
This means we can make NVRAM by ourself,
HM6116+DS1210+two 1.5V AAA batteries=DS1220Y(2Kx8 NVRAM)
one 256K SRAM+DS1210+two 1.5V AA batteries(or one 3V battery)=DS1230Y=M48Z35Y 32kx8 NVRAM,
couple years ago I made following NVRAM for tek 11A32,last week I replaced the HM6116 with a 256K SRAM
and used it in CSA803(for a M48Z35Y=DS1230Y).it works well.by using larger capacity battery the life of data
storage will be much much longer!
Attachments:
NVRAM.jpg: /g/HP-Agilent-Keysight-equipment/attachment/95351/
--
Daun E. Yeagley II, N8ASB
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Re: NVRAM 28-Pin Encapsulated Package DS1230Y and 6811B
I suggest in the strongest terms, do NOT use alkaline
cells in any memory backup scheme. They will leak out
their electrolyte long before they run out the necessary
power to run the backup scheme.
I have done this experiment too many times, and lost too
much equipment to the damage the alkaline cells have done.
If you simply must use alkalines, put them on a long leash
and mount them outside of the instrument.
-Chuck Harris
Jack2015 wrote:
toggle quoted message
Show quoted text
Usually there are three parts in a NVRAM,
1.SRAM
2.DS1210(or DS121x?)
3. 3V battery
This means we can make NVRAM by ourself,
HM6116+DS1210+two 1.5V AAA batteries=DS1220Y(2Kx8 NVRAM)
one 256K SRAM+DS1210+two 1.5V AA batteries(or one 3V battery)=DS1230Y=M48Z35Y 32kx8 NVRAM,
couple years ago I made following NVRAM for tek 11A32,last week I replaced the HM6116 with a 256K SRAM
and used it in CSA803(for a M48Z35Y=DS1230Y).it works well.by using larger capacity battery the life of data
storage will be much much longer!
Attachments:
NVRAM.jpg: /g/HP-Agilent-Keysight-equipment/attachment/95351/
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8510C 85102A IF/DETECTOR L.O. Phaselock Out Upgrade / Option ?
Hi 8510 Experts
I am piecing together an 8510C System ... the 85102A IF/DETECTOR has a BNC cable hanging out of an added rear panel hole with a label that says "L.O. Phaselock Out"? ... Does anyone recall an upgrade or Option like this and how it connects to the rest of the system etc?
Any wisdom appreciated !
73 Kevin
|
Re: NVRAM 28-Pin Encapsulated Package DS1230Y and 6811B
Usually there are three parts in a NVRAM, 1.SRAM 2.DS1210(or DS121x?) 3. 3V battery This means we can make NVRAM by ourself, HM6116+DS1210+two 1.5V AAA batteries=DS1220Y(2Kx8 NVRAM) one 256K SRAM+DS1210+two 1.5V AA batteries(or one 3V battery)=DS1230Y=M48Z35Y 32kx8 NVRAM, couple years ago I made following NVRAM for tek 11A32,last week I replaced the HM6116 with a 256K SRAM? and used it in CSA803(for a M48Z35Y=DS1230Y).it works well.by using larger capacity battery the life of data storage ?will be much much longer! 
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Re: NVRAM 28-Pin Encapsulated Package DS1230Y and 6811B
I just ran into a pair of standard NEC D43256 SRAMs in a socket which contains a small board and two small cells in a 1991 vintage Tek 11801 I am restoring to operation from an E5622, dead NVRAM battery, error.
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Re: HP5335A fan replacement
Would this be a situation where the best option would be to use some CPU cooler fans to direct local airflow to the hot components, allowing quieter fans to do the job in the back frame?
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On 24/03/19 6:12 PM, Dan Nessett via Groups.Io wrote: I have looked high and low for a 80x80 fan that has equal airflow and lower noise specs that the fan already installed in my HP5335A without success. Given the comments by Joe / KN5U that many of the units he has repaired had replacement fans with lower airflow specs and failed Schmitt amplifiers (parts that are no longer available), I have decided to stick with the (noisy) installed fan.
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Re: HP5335A fan replacement
Mouser has several 80x80mm fans of varying depths at ?31 to 47 CFM or did I miss read something.? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117?office (775) 720-6020?mobile s.hanselman@...
a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments.
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On Mar 23, 2019, at 22:12, Dan Nessett via Groups.Io < dnessett@...> wrote: I have looked high and low for a 80x80 fan that has equal airflow and lower noise specs that the fan already installed in my HP5335A without success. Given the comments by Joe / KN5U that many of the units he has repaired had replacement fans with lower airflow specs and failed Schmitt amplifiers (parts that are no longer available), I have decided to stick with the (noisy) installed fan.
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Re: HP5335A fan replacement
I have looked high and low for a 80x80 fan that has equal airflow and lower noise specs that the fan already installed in my HP5335A without success. Given the comments by Joe / KN5U that many of the units he has repaired had replacement fans with lower airflow specs and failed Schmitt amplifiers (parts that are no longer available), I have decided to stick with the (noisy) installed fan.
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I hope no one objects to the cross posting, but I have instruments from all three OEMs.
I'm getting ready to try to bring up my Tek 11801 when the replacement NVRAM shows up.
In the process I'd like to archive all the ROM images. EPROM seems pretty straight forward. I'm not sure about NVRAM devices with factory cal data. Ultimately I plan to do this for all my T&M gear for which images are not already available. Subject to not wanting to disassemble stuff just to copy ROMS.
Can anyone point to existing descriptions of the details? If not, is anyone with experience doing this willing to write something that will guide a novice through the process?
Are any of the OEMs opposed to people trying to maintain old gear posting ROM images online?
Reg
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Re: 8753ES YTO freq vs. Main Coil mA
On 3/23/19 5:03 PM, Peter Gottlieb wrote: Is it not possible to insert even small graphs into these messages?
Let's try attaching... Worked fine. Did not show inline, but as attachment.
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Re: 8753ES YTO freq vs. Main Coil mA
Is it not possible to insert even small graphs into these messages?
Let's try attaching...
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On 3/23/2019 6:00 PM, Peter Gottlieb via Groups.Io wrote: Linear fit yields 22.52 GHz/mA.
Note that with this sensitivity, which is well within the 23 +/- 1 mA per GHz spec, that at the low end the output is BELOW the 3.8 GHz cavity oscillator.? This plot was taken with the following settings:
1)? PLL off
2)? Source in CW mode
3)? Default pretune constants (test 45) loaded
4)? HP 34401A inserted at 40 ohm sense resistor
5)? HP 5342A counter connected directly to YIG oscillator output
Linearity of YIG oscillator looks great.
How does the firmware deal with the YTO being below the cavity oscillator?
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8753ES YTO freq vs. Main Coil mA
Linear fit yields 22.52 GHz/mA.
Note that with this sensitivity, which is well within the 23 +/- 1 mA per GHz spec, that at the low end the output is BELOW the 3.8 GHz cavity oscillator.? This plot was taken with the following settings:
1)? PLL off
2)? Source in CW mode
3)? Default pretune constants (test 45) loaded
4)? HP 34401A inserted at 40 ohm sense resistor
5)? HP 5342A counter connected directly to YIG oscillator output
Linearity of YIG oscillator looks great.
How does the firmware deal with the YTO being below the cavity oscillator?
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Re: I'm officially lost now with this 8753ES
On 3/23/19 1:42 PM, Tam Hanna wrote: Please let me protest the designation of BMP as a Windows format. I was referring to its origins, and the platform on which it sees by far the most application. It was developed by Microsoft, for use within Windows, in the mid-1980s. It has long been supported on most other platforms that have graphical capabilities, but that changes neither its origins nor its primary platform. A BMP, short for BitMaP, simply is the content of a framebuffer farted out to a
disk. Not quite. A BMP file contains a header with metadata (actually two such headers), then a colormap, then pixel data. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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The Zynq and Cyclone effort is aimed at hijacking COTS DSOs. I'm skeptical that one can build HW to the same price point. The motivation is I'm fed up with crappy FW. Even at $20K the FW is crap on the Keysight and R&S instruments I've tried. The only reason I ever looked at those was a 1/2 price deal from Keysight on demo units with full warranty, etc on an MSOX3104T.
The logic behind this is fairly simple. With the low parts count, there are simply not very many possible choices for connecting the ADC to the FPGA. And with the ARM cores one should be able to do a lot of snooping by installing some additional software.
I'd love to have an SMA input HMCAD1520 in a shielded box with PMOD connectors for connecting to a Zybo Z7-20.
A primary goal of mine is to be able to do stackable math operations on the live data the way the LeCroy DDA-125/LC684DLX does.
If you design a board I'll certainly buy a couple boards cash up front.
Is an extender card a fairly simple task? I want one for my Tek 11801 so I can service it and more particularly so I can investigate replacing the 1.4 ps jitter timebase clock with a sub ps chip. There is no component level information on the scope, so the only option is to probe it with my DDA-125 using a GPSDO reference input. My thinking is to make a small board with the new clock ], locate the clock lines, cut the traces and hook in the new chip.
The 11801 has been very difficult to find data for. I finally found an original user manual and service manual on eBay. Everything online was for later variants and clearly different from what I have. I've asked about an extender card on TekScopes, but nothing useful has come up yet.
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Re: NVRAM 28-Pin Encapsulated Package DS1230Y and 6811B
There's always the old "external battery trick" using isolation diodes in the +5 supply line to the NVRAM and hiding a larger battery somewhere in the unit.? This is similar to the non-battery backed NVRAM approaches HP used in some equipment (like in the 8920 communications test set) .? Since the DS1230Y has a 10% supply voltage tolerance Schottky diodes could be used but one would have to noodle with the external battery voltage a bit to bring it to around closer to 5V (series diodes, etc.).? And then there is the chip enable line management to deal with to prevent writing to memory during power down or power up.? It could be done with a little engineering creativeness though.
Greg
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Re: I'm officially lost now with this 8753ES
Please let me protest the designation of BMP as a Windows format. A BMP, short for BitMaP, simply is the content of a framebuffer farted out to a disk. The format was widely used in both LeCroy and Danaher TMI of the area. IMHO, the main issue is the extreme consumption of space, especially if 16bit mode is used.
With best regards Tam HANNA (emailing on a BlackBerry PRIV) Enjoy electronics? Join 14k other followers by visiting the Crazy Electronics Lab at Am 23. M?rz 2019 03:26:38 MEZ schrieb John Miles <john@...>:
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Wow, I can't imagine that any engineer who was able to get hired by HP
wouldn't understand why JPG isn't appropriate for screen shots or other
line art. (or anything else that isn't a continuous-tone natural scene,
which is what JPG was designed for, and the only thing for which it
works well)
The options weren't great back then, unfortunately. The .PNG spec was brand new and hadn't caught on yet. Unisys was shaking everyone down for royalties on the .GIF patent. I'm not sure .BMP existed at that time -- I believe it did, and it would have worked, but it was mostly a Windows-specific format. Dunno if the Unix and Mac people would have been happy with that. .TGA and TIFF would have worked but the files were large and cumbersome, and as I recall they weren't used widely outside the desktop publishing business. .PCX and .LBM would have worked well since RLE compression is a good fit for this type of file, but again they didn't have a lot of support across different platforms and industry sectors.
So that left .JPG. While definitely not the 'right' format, if you crank the quality level up high enough, it could yield tolerable results, and unlike .GIF it could be freely implemented. Arguably HP should have paid the danegeld for the .GIF license and called it good, but it's hard to second-guess them at this late date.
-- john, KE5FX
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Re: My $25 "In Poor Shape" 3468A has arrived
On 3/23/19 12:49 PM, ghnatiuk@... wrote: The ends have to be adjusted to the proper diameter. How do you make them fit? The usual banana plugs have springs to accomodate mismatch. Do you put an upset ridge on them to interference fit? Roll them to exact size? Draw 6 gauge copper through another wire die?
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Re: My $25 "In Poor Shape" 3468A has arrived
Alex, PayPal is fine.? Send to ghantiuk@...?and send as a friend so PayPal does not extract money out. Stranded wire will not work. If you want two jumpers for 4-wire Ohm cal(SOURCE and SENSE), then add and additional $5. State a complete address with city etc.? I will not replace items if the mail messes up.? There is a limit to my time in making these jumper shorts.? The ends have to be adjusted to the proper diameter.? #6 solid wire is close but not on the money. The price I am giving you is Waayyyyyyyyy below cost in material and labor. GH
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David, I tried that first.? Uploading to the pictures area didn't seem to have a button.? I only could upload to the files area, so that's what I did.
Bob
On Friday, March 22, 2019, 11:53:18 PM PDT, David C. Partridge <david.partridge@...> wrote:
You probably should have uploaded them to the Pictures area (not the Files area) and placed them in a Folder called (e.g.) ¡°8657B Frequency Doubler Internals¡±.?? I suggest you delete the jpgs you uploaded to the files area. ? David ?
From: [email protected] [mailto:[email protected]] On Behalf Of Bob Albert via Groups.Io
Sent: 23 March 2019 04:13
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] New file uploaded to [email protected] ? This was my first upload and I didn't do it right.? I uploaded 10 pictures of the frequency doubler of the 8657B.? I neglected to rename the pics to something useful, and I didn't explain what they were.? So nobody will know unless I can be shown how to correct this.
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Martin Rickes
Kevin Hobbs
Dave McGuire
