Just got back from the U of M Surplus Store (PROPERTY DISPOSITION): http://procurement.umich.edu/property-space-management/property-disposition-public-shopping
?
I was so excited to pick up a HP16601A with a HP16533A for a reduced price along with a NI DAQ 6024E PCMCIA card in a $10 IBM T42 laptop... that I had to go back in to look again for other items at a great price.? Of which I found some other items at awesome prices.? If the items have been dated older than two weeks... you can try to negotiate pricing.??
?
There are a few more HP16601A's also and I think one with a 16533A card last I looked.?
There are also HP Reflection - Transmission Test Unit's 8742A and 8743A. I don't have the other gear for... though is a goal for in the future... especially for use in wanting to track and glean satellite data. I still need to learn more however.
For those on the TekScopes page that I am blocked on (this group is more forgiving and I hope would at least give me a warning if an issue), I noticed they had a Tektronix 2213 if I'm remembering correctly on one of the shelves on the wall behind the monitor shelf and I think two 500 series scopes on the lab equipment shelves.??
?
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Re: Bad 1820-0986 in 5340a Counter
You could probably use a dm76l75, it's functionally identical with
slightly different ratings (like the 54/74 TTL chips). These guys
say they have 3 in stock, don't know at what price
That chip's from 1976, a presettable decade ripple counter. You
could probably cobble up a substitute from the data sheet. Use
a PIC or other processor chip that's fast enouth with enough I/O,
the max clock freq is specified at 6 MHz.
This is a low power version of the 74160a or dm9310 according
to the data sheet; course those are obsolete too, but they
might be substituted.
Good luck
Paul
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On Mon, Oct 01, 2018 at 03:33:00PM -0700, Gary Appel wrote: 1820-0986, National 86L75N.
Anyone know if these are available anywhere? Sphere does not have any.
Gary Appel
!DSPAM:5bb297b9217213291810484!
--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows
|
Bad 1820-0986 in 5340a Counter
1820-0986, National 86L75N.
Anyone know if these are available anywhere? Sphere does not have any.
Gary Appel
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Re: 16702A/B fan upgrade (was Recently accuired a Hp 16700a)
Keith,
It's the SCSI2SD v6 from Inertial Computing.
Scott
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Re: 16702A/B fan upgrade (was Recently accuired a Hp 16700a)
Scott,
Are you using SCSI2SD? The one from Australia?
I had an earlier version. The newer version v6 has 4-8x performance over the earlier ones, given quality SD cards. Beware the counterfeits, too.
Part of my original upgrade had to do with ease of write/re-write of the SD cards over the SCSI drives. There's definitely a reduction of power and noise.......although I agree it's a minor improvement in noise.
Even if the SD died, I think maybe quicker easier maintenance if you just had to pull an old SD card and replace it with a new one. You'd be using modern tools, interfaces, and cards..... a little easier than messing with SCSI drives.
I haven't tried the v6 SCSI2SD, but maybe I will!
Thanks
Keith
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On 10/1/2018 3:45 PM, csc316@... wrote: Oh hey, cool!? Looks like we did just about exactly the same thing with virtually identical Noctua fans.? Nice instructional web page.? So much better than my just giving part numbers and saying "have a go".
You note that you want to do the power supply fans too.? I highly recommend it.? This is where MOST of the fan noise came from.? I don't have my data in front of me right now, but in addition to doing a before/after on the CFM and the temperatures, I did the dB before and after various steps of the upgrade.? I want to say, from memory, that I got an overall reduction of about 5dB from doing the three main 120mm fans (mine actually had three whereas yours appears to have had two and you put in a third anyway).? I got almost another 10dB from the two tiny power supply fans.? And maybe another 1dB from replacing the SCSI hard drive with an SD card.
Those power supply fans are a beast to remove.? Unlike the main fans, it's not just a matter of taking off the case and finding someone with tiny hands to unscrew the middle fan.? The power supplies are a pretty serious disassembly process.? But well worth it.
FYI, again off topic (sorry), but for anyone considering the SCSI card to SD card swap, don't bother.? It's going to cost you $80 and the time to do a reignite (plus cables and a SCSI CD Rom if you don't have one). It doesn't contribute much to sound reduction.? And it only improved boot time by about 5 seconds and doesn't noticeably speed the unit up at all during normal operations.? I found the only advantage to be (possibly) reliability, though that's in doubt since I think you're not supposed to use SD cards for primary drives.? Unless maybe I have a bad SCSI-SD unit, but I doubt it or it probably wouldn't work at all.
Scott
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Re: 16702A/B fan upgrade (was Recently accuired a Hp 16700a)
Oh hey, cool!? Looks like we did just about exactly the same thing with virtually identical Noctua fans.? Nice instructional web page.? So much better than my just giving part numbers and saying "have a go".
You note that you want to do the power supply fans too.? I highly recommend it.? This is where MOST of the fan noise came from.? I don't have my data in front of me right now, but in addition to doing a before/after on the CFM and the temperatures, I did the dB before and after various steps of the upgrade.? I want to say, from memory, that I got an overall reduction of about 5dB from doing the three main 120mm fans (mine actually had three whereas yours appears to have had two and you put in a third anyway).? I got almost another 10dB from the two tiny power supply fans.? And maybe another 1dB from replacing the SCSI hard drive with an SD card.?
Those power supply fans are a beast to remove.? Unlike the main fans, it's not just a matter of taking off the case and finding someone with tiny hands to unscrew the middle fan.? The power supplies are a pretty serious disassembly process.? But well worth it.
FYI, again off topic (sorry), but for anyone considering the SCSI card to SD card swap, don't bother.? It's going to cost you $80 and the time to do a reignite (plus cables and a SCSI CD Rom if you don't have one).? It doesn't contribute much to sound reduction.? And it only improved boot time by about 5 seconds and doesn't noticeably speed the unit up at all during normal operations.? I found the only advantage to be (possibly) reliability, though that's in doubt since I think you're not supposed to use SD cards for primary drives.? Unless maybe I have a bad SCSI-SD unit, but I doubt it or it probably wouldn't work at all.
Scott
?
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Re: 16702A/B fan upgrade (was Recently accuired a Hp 16700a)
Hey Scott,
If interested:
Here's my fan replacement info here:
While I think the CFM ratings are fine, I could have done a better job of making sure the same or better static pressure was being achieved.
Maybe since I likely have compatible connectors now, I should swap them out for something more powerful.
Practically speaking, there's been no problems with the unit as far as I can tell.
Thanks for putting your info out there.
Keith
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On 10/1/2018 8:51 AM, csc316@... wrote: In the 16702A I put (3) NF-S12A PWM fans (120mm x 120mm x 25mm) plus (2) NF-A6x25 FLX fans (60mm x 60mm x 25mm).? The PWM fans aren't actually doing PWM, of course, but you can wire them for constant full speed operation too.? I imagine you can get the 3-pin FLX equivalent fans instead, but I think they're the same price.? No cooling problems at all, card cage a couple degrees cooler than with the stock fans.
Whisper quiet.
In the 16702B I did (3) NF-F12 industrial 2000rpm I67 PWM fans, plus the same (2) 60mm fans on the power supply.? I wanted a little more pressure (also has a little more CFM) in the back because I knew I'd be loading up the card cage with hot stuff.? Probably overkill.? It's a little noisier with these fans than with the NF-S12A fans in the 16702A, and will move papers around on my workbench if I set them near the vents.
?But still a major improvement over the stock jet engines in terms of sound.
I do not know the published CFM and pressure ratings on the original fans, only the overall airflow through the vents with them installed (which the Noctua fans matched or exceeded according to my anemometer). So please people don't jump all over me with your devilish Bernoulli equations and book values.? I'm just contributing what worked for me and has been working for some time without any problems in a fully loaded unit.? I'm sure I've offended the purists.
Scott
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Re: 16702A/B fan upgrade (was Recently accuired a Hp 16700a)
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Re: 16702A/B fan upgrade (was Recently accuired a Hp 16700a)
Nah .... in this context Bernoulli equations are just so much hot air.....
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On 10/1/2018 1:51 PM, csc316@... wrote: So please people don't jump all over me with your devilish Bernoulli equations
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Re: Recently accuired a Hp 16700a
You can upgrade to the latest version of software for the system. This can
be a little tricky, the system is particular about the SCSI cdrom drive
and some versions of the software image (eg, the Keysight version) were
damaged. I don't know if Keysight fixed their image. This is worth
the bother, however. There are sites with known good images.
If you're Unix oriented, there's quite a lot you can do with a 16700.
The root password is available and you can do a lot by changing the
hard drive to a larger one and adding some reasonable Unix utilities.
The system runs HPUX 10.2 and you can get binaries (eg bash and ssh)
from the merijn archive to load on the system. I rearranged mine from
a LA that runs on a computer to a computer that runs an LA, which fits
my environment better (I also got rid of that horrible Win95 desktop
they had set up along with the session manager which is something of a
resource hog).
You can setup a remote X display so, for example, you can have a 24
inch DSO display if you have one of the scope cards installed. That's
very cool. There's free software available to use a Windows system as
your display if that's what you have.
You can use a SSD instead of an [old] hard drive, but SCSI adapters
are getting a little pricey these days. I had a pile of LVD drives
sitting around so that's what I put in mine. Long term, I think a SSD
would be a good idea. Might speed things up a bit; that's only a
100 MHz processor in there.
License keys are available for all of the utilities. You can
set them up in Demo mode and get a 30 day trial. If you go back
in the archives I think someone posted keys for personal noncommercial
use a year or two ago.
There are a few sites on the web that have interesting details about
the 16700 system along with hints and tips for usage. Google is
your friend.
Paul
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On Sun, Sep 30, 2018 at 02:06:28PM -0700, Miles Paulson wrote: Hello,?
I just got myself a 16700A with option 3 and a 16710A card. I haven't had a chance to power it on yet because I don't have a ps2 keyboard and mouse or a vga cable. The module has the cables, but none of the flying lead pods, does someone have a part number for these? Also, are there any recommended or must have modules for these? I know they make an oscilloscope module, is it worth tracking down if you already have a decent scope? Any advice on improving the LA or adding optional features?
Thank you
!DSPAM:5bb13249262266401512657!
--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows
|
Re: HP86222A/B need PS voltages for 3.8 GHz cavity oscillator
Ed If ur talking about the YIG takes -10 and +20? ?We have the manual if u need it Dave Manuals@...
On September 30, 2018 at 7:46 PM "Ed Breya via Groups.Io" <edbreya@...> wrote:
I know this info must be somewhere, but couldn't find any 86222 manual.
Real quick, does anyone happen to know what supplies are used on the little 3.8 GHz cavity oscillator (PN 86222-60007) that's used in the HP86222 to mix with the YTO down to the output frequency? I have two of these, and I marked one +20 and -10, and the other +10 and -20. They were acquired years apart, and I probably marked them by tracing wiring while junking stuff out, but clearly I made a mistake on one. The 8620A/B/C mainframes that run these plug-ins provide +20 and -10 V supplies, so that would make the most sense. Just want to be sure.
Ed
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Re: 16702A/B fan upgrade (was Recently accuired a Hp 16700a)
This was to Peter Gottlieb, by the way.? I changed the subject but didn't include the original question.? Sorry.
|
16702A/B fan upgrade (was Recently accuired a Hp 16700a)
In the 16702A I put (3) NF-S12A PWM fans (120mm x 120mm x 25mm) plus (2) NF-A6x25 FLX fans (60mm x 60mm x 25mm).? The PWM fans aren't actually doing PWM, of course, but you can wire them for constant full speed operation too.? I imagine you can get the 3-pin FLX equivalent fans instead, but I think they're the same price.? No cooling problems at all, card cage a couple degrees cooler than with the stock fans.? Whisper quiet.
In the 16702B I did (3) NF-F12 industrial 2000rpm I67 PWM fans, plus the same (2) 60mm fans on the power supply.? I wanted a little more pressure (also has a little more CFM) in the back because I knew I'd be loading up the card cage with hot stuff.? Probably overkill.? It's a little noisier with these fans than with the NF-S12A fans in the 16702A, and will move papers around on my workbench if I set them near the vents.? ?But still a major improvement over the stock jet engines in terms of sound.
I do not know the published CFM and pressure ratings on the original fans, only the overall airflow through the vents with them installed (which the Noctua fans matched or exceeded according to my anemometer).? So please people don't jump all over me with your devilish Bernoulli equations and book values.? I'm just contributing what worked for me and has been working for some time without any problems in a fully loaded unit.? I'm sure I've offended the purists.
Scott
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Re: E4406A GPIB errors with KE5FX utilities
Hmm, sounds like it.? If upgrading the firmware takes care of the problem, let me know and I'll add an FAQ entry.? ? -- john, KE5FX ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Neil Smith
Sent: Monday, October 01, 2018 4:46 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] E4406A GPIB errors with KE5FX utilities? Well this is interesting.? Exactly the same outcome as GPIB when I use ethernet with psaplot.? Also ssm still fails.? Time to get a firmware update done I guess. Neil
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Re: E4406A GPIB errors with KE5FX utilities
Neil
Have been there--use lan and print option you can have a nice
screen plot to your pc.
Hardy
?
?
Thanks John, the same thing happens even if I don't send any config
strings.? I suspect it might be a timing issue, but I'm pulling the thing
out of the rack to connect the ethernet port.? Whose silly idea was it to
install three 42U racks in my study without any rear access, then fill them
with big heavy lumps of testgear?? Maybe I just a firmware update.?
Let's see how I get on with the ethernet connection though.? I wish I'd
thought ahead and fitted a patch cable BEFORE slamming it all in the rack.
Neil
?
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On 01/10/2018 11:43, John Miles wrote:
?
That being said... if your E4406A has an Ethernet jack, I'd strongly
recommend using that instead of GPIB.? The connection will be much
faster.? SSM - john, KE5FX
?
?
?
If I fire up my E4406A and issue
an SCPI control string to it, then capture a spectrum and request a GIF grab
using PSAPLOT, it works fine the first time.? Subsequent use of the same
command result in a read error 0x2...
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Re: E4406A GPIB errors with KE5FX utilities
Well this is interesting.? Exactly the same outcome as GPIB when
I use ethernet with psaplot.? Also ssm still fails.? Time to get a
firmware update done I guess.
Neil
C:\Program Files (x86)\KE5FX\GPIB>psaplot 1 ggg.gif
Client "xx99", address 10.xx.yy.3, Windows Sockets V2.2 (WinSock
2.0)
Connected to server 10.xx.yy.20:5025
Connected to Hewlett-Packard,E4406A,US40061883,A.04.21?? 20000921?
10:42:11
Done, 15749 bytes written to ggg.gif
C:\Program Files (x86)\KE5FX\GPIB>psaplot 1 ggg.gif
Client "xx99", address 10.xx.yy.3, Windows Sockets V2.2 (WinSock
2.0)
Connected to server 10.xx.yy.20:5025
Connected to Hewlett-Packard,E4406A,US40061883,A.04.21?? 20000921?
10:42:11
Read error 0x2, cnt=0
?(Communications error)
On 01/10/2018 12:24, John Miles wrote:
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It'll
be worth it, trust me. :) ?
?
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Re: E4406A GPIB errors with KE5FX utilities
It'll be worth it, trust me. :) ? ? Once it has acquired a DHCP lease or otherwise has a valid IP address, check to make sure the SCPI port is set to 5025 (you can leave Telnet at 5023) and use 'Edit CONNECT.INI' to specify the same IP address in the interface_settings line, e.g. 192.168.1.100:5025 .? Before saving the file, set is_Prologix to 0, and that should do the trick.? The GPIB address is not used with the utilities when it's set up this way, so you can just use 1 everywhere. ? -- john, KE5FX ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Neil Smith
Sent: Monday, October 01, 2018 4:10 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] E4406A GPIB errors with KE5FX utilities? Thanks John, the same thing happens even if I don't send any config strings.? I suspect it might be a timing issue, but I'm pulling the thing out of the rack to connect the ethernet port.? Whose silly idea was it to install three 42U racks in my study without any rear access, then fill them with big heavy lumps of testgear?? Maybe I just a firmware update.? Let's see how I get on with the ethernet connection though.? I wish I'd thought ahead and fitted a patch cable BEFORE slamming it all in the rack. Neil
|
Re: E4406A GPIB errors with KE5FX utilities
Thanks John, the same thing happens even if I don't send any
config strings.? I suspect it might be a timing issue, but I'm
pulling the thing out of the rack to connect the ethernet port.?
Whose silly idea was it to install three 42U racks in my study
without any rear access, then fill them with big heavy lumps of
testgear?? Maybe I just a firmware update.? Let's see how I get on
with the ethernet connection though.? I wish I'd thought ahead and
fitted a patch cable BEFORE slamming it all in the rack.
Neil
On 01/10/2018 11:43, John Miles wrote:
toggle quoted message
Show quoted text
That
being said... if your E4406A has an Ethernet jack, I'd
strongly recommend using that instead of GPIB.? The
connection will be much faster.? SSM - john, KE5FX
?
?
?
If I fire up
my E4406A and issue an SCPI control string to it, then
capture a spectrum and request a GIF grab using PSAPLOT, it
works fine the first time.? Subsequent use of the same
command result in a read error 0x2...
_._,_._,_
|
Re: E4406A GPIB errors with KE5FX utilities
Hi, Neal -- ? I haven't heard any other reports of this behavior.? I just tried running psaplot with a Prologix adapter, and it appears that repetitive screenshot captures work OK here: ? --------------------------------- c:\dev\gpib\tools>query 17 *IDN? Hewlett-Packard,E4406A,MY44021638,A.08.10??? 20041215? 12:30:18 ? c:\dev\gpib\tools>psaplot 17 a.gif Connected to Hewlett-Packard,E4406A,MY44021638,A.08.10??? 20041215? 12:30:18 ? Done, 16851 bytes written to a.gif ? c:\dev\gpib\tools>psaplot 17 a.gif Connected to Hewlett-Packard,E4406A,MY44021638,A.08.10??? 20041215? 12:30:18 ? Done, 16889 bytes written to a.gif ? c:\dev\gpib\tools>psaplot 17 a.gif Connected to Hewlett-Packard,E4406A,MY44021638,A.08.10??? 20041215? 12:30:18 ? Done, 16884 bytes written to a.gif --------------------------------- ? It looks like you have an older E4406A, or at least an older firmware version, so maybe there's a timing issue of some kind.? Does the problem still happen if you don't send any strings to the analyzer prior to running psaplot? ? There are no special options required, other than using the -scpi option with SSM, but one suggestion might be to hit the 'Edit CONNECT.INI' button in the GPIB configurator and play with the write_delay_ms and reset_to_local settings.? ? That being said... if your E4406A has an Ethernet jack, I'd strongly recommend using that instead of GPIB.? The connection will be much faster.? SSM will run at 20-30 FPS or more, for instance.? ? -- john, KE5FX ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Neil Smith
Sent: Sunday, September 30, 2018 1:09 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] E4406A GPIB errors with KE5FX utilities? If I fire up my E4406A and issue an SCPI control string to it, then capture a spectrum and request a GIF grab using PSAPLOT, it works fine the first time.? Subsequent use of the same command result in a read error 0x2...
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Re: Calibration of 4285A Precision LCR meter 75 kHZ to 30 MHz. 0.1%
Dr. David Kirkby from Kirkby Microwave Ltd
On Mon, 1 Oct 2018, 04:10 Don Bitters via Groups.Io, <donbitters= [email protected]> wrote: All, please note that where 5V is referenced in the “strange readings” it is actually 5mV and the high allowed reading is 6.42mV.? This would not be out of range accuracy as this is probably the bottom of the 100mV range.? If the range accuracy is 1.5% (1.5mV) then this is the tolerance.? The actual reading is better than that.? The actual reading tolerance is described in a more complicated but more precise fashion.
See the manual for the exact description of the accuracy and the calculations that derive it.
Thank you for the explanation.?
The 4284A/4285A/4286A family of LCR meters is my favorite of all of the HP, Agilent, Keysight LCR meters.
I also have an old 4263A LCR meter I bought fairly cheaply. It has a rather annoying user interface.? The interface on the 4284A & 4285A is 100 dB better than the 4263A.
They always read more accurate than the spec. and were extremely repeatable.
Don Bitters
That's an interesting comment you make about thei accuracy if the 4284A & 4285A.? One of the other things I found odd on the 4285A cal certificate was the use of a 4284A (20 Hz to 1 MHz) LCR meter as equipment used for calibration. It is not obvious to me what measurement is taken with the 4284A.?
Also I note that the 4285A was calibrated in June 2012, but Agilent's own 4284A was not due for calibration until January 2014 - a period of more than 18 months.? That struck me as a bit odd given the calibration interval recommended for the 4284A LCR is only 6 months.?
I often wondered if the short (6 month) calibration interval of the 4284A was a reflection of the fact it drifted quite a bit.?
Although I have a 4284A which I had calibrated by Keysight about 2 years ago, I don't know if my 4284A was received in spec or not. Keysight kindly agreed to give me the software option 006 (4 m lead length) free. As such it was considered a new/refurbished instrument, with no "before data" available.?
I wonder why Keysight discontinued the 4285A. There is no obvious replacement for it. The highest frequently 4TP LCR meter Keysight now have is 2 MHz, but the 4285A covered up to 30 MHz.?
Dave.?
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jafinch78 .
Keith Monahan