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Re: OT: Altera Stratix V FPGA design, use ...
Yes, I designed with Altera FPGAs some years ago. For the decoupling I used their free decoupling design tool. It worked out quite well. However, this tool was a bit primitive. You need to understand what you are doing. The end result is a number of caps ranging from 10p up to 100n.
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G?ran |
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Re: OT: Altera Stratix V FPGA design, use ...
Yes, I designed with Altera FPGAs some years ago. For the decoupling I used their free decoupling design tool. It worked out quite well. However, this tool was a bit primitive. You need to understand what you are doing. The end result is a number of caps ranging from 10p up to 100n. G?ran |
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Re: Looking for manual for newer 5335A (serial 3145)
Hi,
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Thanks Dr. Frank. It was actually your post on eevblog, where I learnt that such a newer manual exists. I'll have a look around, but I haven't found Manual Plus at first check. Though I'm not sure if it is worth to spend more on the manual than the actual device. I wonder if there are any significant changes. My unit seems to work, and agrees fine with the GPSDO, but there could always be some gotchas with outdated manuals, especially if I plan to check if it is in spec. However, the 5335A is such a nice instrument, it would be fun to have the proper manual. Could this be the first step towards time-nuttery :-) Szabolcs Dr. Frank <frank.stellmach@...> ezt ¨ªrta (id?pont: 2020. febr. 24., H, 9:35):
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Re: hp 83592A problem
Oh I am so lucky to live near CPC, where I can buy lots of coax adaptors N-type/SMA/TNC etc. On 23 Feb 2020 22:22, "Paul Bicknell" <paul@...> wrote:
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Re: Looking for manual for newer 5335A (serial 3145)
I bought this manual, paper version, from ManualsPlus in 2010. 109$ including shipping.
It was not available otherwise, especially not in electronic format from ARTEK Media (they only had the -021 version)? I doubt that ManualsPlus still exists. Frank |
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Looking for manual for newer 5335A (serial 3145)
Hi,
I have a really nice 5335A with all four options. It is a high serial number unit with serial 3145. I was able to find online the manual and addendum with changes up to serial 2520. I have found that there is a newer manual (part no: 05335-90044 ) that covers these high serial units. However, I was not able to find it online, and Artek seem to have the older manual only (at least their search only shows the one with part no 05335-90021). Do you know if the newer manual or at least the list of chnages is available anywhere? Thanks. Szabolcs |
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Re: 8720D firmware update
I meant to say that upgrading to V7.XX is probably not worth the money. You can download measured S-parameter data and make nice screen shot plots using John's utility. It actually works better than the way they implemented it in the firmware. Some of the bug fixes are good to have, but since you have option 010, the new bug I mentioned could be a problem for you. It is for me, my analyzers have opt. 010.
Now, it may be worth updating from 6.10 to 6.14. It depends on when that opt. 010 bug was introduced and I just can't remember if that came with the new CPU board (V7.XX firmware) or earlier. If you can find the ROM images and some UV PROMs to burn, you could try upgrading to V6.14 at minimal cost. If there is a problem, you can always go back to 6.10. There is one more thing you should research if you decide to upgrade to V6.14. When they introduced V6.12 for the 8753, a hardware change was required for older 8753D analyzers. It is possible, but I don't know, that a similar problem affected the 8719/20/22D at the time of the ugrade to V6.12. The hardware change was just an electrolytic capacitor in the power supply, but getting to it was a bit of work. Anyway, I don't know if this affects any of the 8720Ds, or your analyzer. The problem was described in service note no. 8753D-02. I will look for some notes about new features and bug fixes going from 6.10 to 6.14. They were somewhere on the web. Vladan |
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Re: 8751A floppy drive
Thanks, I read the Ipcas document?
I am fluent in german so I¡¯ll keep looking for further documentation, but so far I am unable to find the difference between the Ipcas, Gotek, Nalbatov devices, they all seem to be the same, even the Floppy Manager software is identical (only not in Chinese). I¡¯m afraid the devil is in the details, so there¡¯s no point to keep buying emulators until hopefully one fits, I believe there¡¯s a customization in the emulator firmware to support these old Sony drives.or perhaps there¡¯s a hardware (connector) mismatch as the post in the Keysight forum suggests. The winner would be certainly pulling the logic analyzer and digging in the original floppy signals (while it still works a little) or to find out what exactly other 8751A owners are using. Certainly a newer Sony floppy or a $20 Gotek emulator don¡¯t work out of the box. |
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Re: 8720D firmware update
¿ªÔÆÌåÓýOk. ?It sounds like little is to be gained. ? If I read you correct I don¡¯t need to worry about going from 6.10 to 6.14. ? It says option 010 at bootup Thanks Dave On Feb 23, 2020, at 9:40 PM, pianovt via Groups.Io <pianovt@...> wrote:
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Re: 8720D firmware update
If you have V6.10, the last firmware version you can use on your processor board is V6.14, which was released some time in late 1997. The upgrade is by means of PROMs.
In order to install V7.12 and newer firmware, you would have to get a new processor board. That's the upgrade kit you mentioned. These newer boards were used in late production 8720D, 8720E and ES. The same board was also used in the 8753 series. These newer boards do not use UV proms. Updates are done via floppy drive (another thing to consider when thinking of USB floppy emulators - they may or may not work for that). While they fixed some bugs and added some features in later firmware, they also made it worse in other areas. There is at least one serious bug which was introduced and never fixed. I can't remember which revision that was, but it may have been after yours. Using John Miles' utilities, you can do all the useful things that the later firmware revisions implemented. One new feature of the later models was ecal, but on the 8753/8720 series the implementation was clumsy, with a glue box. I have no desire to use it. Does your D have any options installed? Vladan |
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Re: 8751A floppy drive
On Sun, 23 Feb 2020, Ovidiu Popa [Business] wrote:
Won an 8751A on EBay, for rather cheap, after a competitive auction. HasDon't know about floppy drive replacement but have a question -- would you share those EPROMs with Instrument Basic (Opt.02)? I'm trying to get them for many years and other than occasional Opt.02 instrument at some insane price haven't seen any source for those EPROMs. It is also interesting what version of main firmware do you have -- it would've been also interesting if it is something newer that what I have in my 2 8751A instruments. BTW, I recommend replacing all aluminum electrolytics on receiver boards (3 of identical boards are there) as soon as you can hoping it is not too late yet -- most of receiver related failures are caused by those capacitors. They are relatively small value ones (don't remember now -- something like 10...47uF 5 or 6.3 mm diameter small caps) around digital filter chip but they almost 100% sure have their guts spead around significant area by now. --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * * |
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8720D firmware update
So my new to me 8720D has firmware 6.10.? I see there is much newer versions out there. ? Reading the Keysight website they talk about you need to do some upgrade to Option 00. ? Is this possible and what does it involve? I am thinking it has to do with changing out the EPROMs with flash devices.? ?
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Re: HP 83595A Sweeper Plugin OP & Service-Manual
I will doubly recommend that you have very steady hands and a decent microscope (I used 60-100x Leica binocular), handy if you are going to open the YTM.
Before you open it check the small pc brd that has drive components on it - some transistors, resistors, and capacitors - the resistors and some of the caps are selected to match this particular YTM ser. no. I have seen a shorted transistor and a shorted cap. on this brd that took down the -40V supply. The YTM is a current driven device. Tune current is in the 1 mAmp range, typical drive voltages are 1-20 volts, YIG¡¯s are normally 1V/GHz drive voltage. The YTM heater circuit could easily draw 1 amp. Heater circuit working properly the YTM will feel warmer than ambient, but not burn your finger. If you absolutely have to open the YTM, reassembly is very critical - score a fine line across the joint of the 2 halves of the YTM. Inside you will find a small donut hollow cavity with a very, very small circuit at the center. Surrounding the cavity will be another fine wire coil - the YTM drive coil. Separating the YTM halves will affect the magnetic field and will require a complete frequency tune realignment. If you get lucky it will not require a frequency response align, but I would bet that some frequency response align will be necessary. I have done several complete frequency align and response aligns on these sweeper plugins. The alignment is long (8+ hrs.), tedious, and interactive adjusts. 2 - 3 iterations will be required to get it into spec. or better than spec.. I have gotten the flatness to +/- 1dB to 18GHz and +/- 2dB to 22GHz using all of the HP specified ETE, but that was over 25 yrs. ago. Don Bitters |
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Re: Schaffner Filtered Power Entry Module (HP54504A 400MHz scope)
¿ªÔÆÌåÓýHello, yes - if you want to, you can dremel in and replace the battery with an external one...
Tam With best regards Tam HANNA Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at On 2020. 02. 24. 4:49, Jim Ford wrote:
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Re: 8751A floppy drive
¿ªÔÆÌåÓýI did some research last week for my 8720D. ?I found these folks who seem to be a viable solution. ? They are not the cheapest game in town but appear to be a solution that will work. ? I have not ordered mine yet. ? YMMV Dave VE7HR? On Feb 23, 2020, at 7:14 PM, Tam Hanna <tamhan@...> wrote:
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Re: Schaffner Filtered Power Entry Module (HP54504A 400MHz scope)
¿ªÔÆÌåÓýThanks, Tam. That's probably relatively easy to remedy.? I did such a repair on a Tek logic analyzer.? Jim Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: Tam Hanna <tamhan@...> Date: 2/23/20 4:51 PM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] Schaffner Filtered Power Entry Module (HP54504A 400MHz scope) Hello, pardon my aging brain, but AFAIK, BTW, this scope also fails the Analog Trigger, DAC, and ADC
self-tests.? Any insights on how to rectify those?
is caused by dead NVRAM bat
With best regards Tam HANNA Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at On 2020. 02. 24. 0:55, Jim Ford wrote:
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G?ran Krusell
Sergey Kubushyn