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7D02 Logic Analyzer
Paul Anderson
I have a Tektronix 7603 mainframe, with a 7D02 logic analyzer plugin.
Unfortunately, I don't have any probes, personality modules or manuals. I'm not really what constitutes normal behaviour when you just turn it on or not, so I'm wondering if it's seriously unhealthy. When I turn the scope on, the screen fills with nines and underscores, like this: 9_9_9_9_9_ 9_9_9_9_9_ 9_9_9_9_9_ The longer the scope is on, some of the 9's will start changing into other characters like semicolons and equal signs. It almost seems like I'm looking at a memory dump? Does anyone have any thoughts on the meaning of this output? -- Paul Anderson VE3HOP wackyvorlon@... "May the electromotive force be with you." |
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Re: Replacement to DS1230AB Lithium backed NVRAM
"John Miles" <jmiles@...> wrote:
Sounds like the whole RAM is battery-backed, not just the address space usedIt wouldn't be the first time something like that has been done: Not Dallas, but it's the same idea. -ls- |
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Re: Replacement to DS1230AB Lithium backed NVRAM
John Miles
Sounds like the whole RAM is battery-backed, not just the address space used
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to hold calibration constants and instrument state. Is it practical to Dremel the Dallas part open and replace its integral lithium cell with an outboard cell? -- john, KE5FX I have found that the FRAM devices are not a viable option in the |
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Re: Replacement to DS1230AB Lithium backed NVRAM
I have found that the FRAM devices are not a viable option in the
243X/40. Sadly I must report that what looked like a very promising alternative to the DALLAS RAM/Lithium cell combo has turned out to be a dead end. I have been testing for over one month now on a 2430A, 2440 and 2465B and everything seemed fine. My last test was to actually determine the read/write frequency to the device. It turn out a 2430A writes to the battery-backed devices as often as once every microsecond. Since the FRAM device as a maximum of 10^10 read/write cycles (before it loses its NV capability) a quick calculation reveals that the 2430A scope will render the FRAM device a volatile device in one to three months. For now I can only recommend the DALLAS (or other vendors) RAM/Lithium cell combo pack device for use in Tek scopes. Sorry for getting everyone's hopes up for a more inexpensive replacement for NVRAM. --Victor Silva |
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1S2 Sampling Unit and TDR Manual to a good home
Dennis Tillman
Hi everybody,
I have a genuine original Tek 1S2 manual (070-0889-00, no serial number). Cover page says Copyright 1966, new material copyright 1968 so it probably covers many instruments. No additional changes are shown in the back of the manual. No serial numbers indicated on the schematic pages so it appears to cover all the 1S2s made up through 1968. About 1" (25mm) thick Also included is a xerox copy of Tek Service Scope Aug 1967 article on TDR using the 1S2. First one to claim it gets it. Domestic shipping will be via UPS Ground. No other charges for packing. Flat feee for shipping to anywhere in the US is $8.00 (unless you will be picking it up in person). Overseas shipping costs via the USPS are anybody's guess. NON-DISCLAIMER: I have a 100% financial interest in the disposition of this item :) Dennis Tillman Silicon Designs, Inc. 1445 NW Mall Street Issaquah, WA 98027-5344 dennis@... www.silicondesigns.com 425-391-8329 Voice 425-391-4077 FAX |
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Re: Acquisition of 535A and 581 - info for a 7000-er?
arthurok
the 535a is a fine choice as a general purpose lab scope
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if 15 mhz will do it. im a bit down on the 545a because of its 4 cm verticle height + very complex vert delay line as a plug in tester i think that it will test any letter and number plug ins if 15 mhz will do you ----- Original Message -----
From: Bill R Cc: TekScopes@... Sent: Thursday, February 01, 2007 7:43 PM Subject: Re: [TekScopes] Acquisition of 535A and 581 - info for a 7000-er? Christian, BAMA has the 585 manual. A 581 is like a 585 but has only one timebase. The vertical amps will be the same, and the power supplies will be very close. The one sweep on the 581 will be the same as "A" sweep on the 585. Right: To use letter series plug-ins with a 581 you need an adapter plug-in, type 81. The plug-in of choice for the 581 is the type 82, a dual channel. Single channel is type 86. Both 581 and 585 came in "A" versions. Good luck! Bill R Christian A Weagle wrote: > Good day, > > A friend of mine has offered me two tube scopes of unknown provenance, > he believes however that they are not working. They are > > Type 581 Serial #001067 > Type 535A Serial #025668 > > BAMA has provided me with manual for the 535A (even seems to be the > right vintage), but I came up short on the 581 - any pointers? I > don't know what/if any plugins will be coming (the scopes are > currently a long way away from both of us). > > This will be my first foray into the earlier offerings from Tek. I > understand that both of these scopes will use letter and 1-series > plugins, the 581 needing the 81 adapter. Any other gotchas? I will > of course peruse the archives, but I would welcome any tips useful to > someone used to working on 7000-era gear. Ahh, yes, I know that the > voltages tend to be a bit higher, and that I probably could stand to > get a 100x probe! > > > > > Yahoo! Groups Links > > > > > > |
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Re: Acquisition of 535A and 581 - info for a 7000-er?
faustian.spirit
--- In TekScopes@..., Bill R <bill1904@...> wrote:
timebase. The vertical amps will be the same, and the power supplies will be verySo what is your total cost for these (even if they are for free, shipment or petrol costs...)? "Non working" could mean one or more of the following faults, which WILL require either unusual spare parts or workarounds: CRT gassy or out of geometry. Defective mains transformer (mainly heater winding insulation). Defective EHT transformer (people have probably talked up a book about that here). Defective time relay (not easily obtained). Several capacitors leaky (depends on the brand and charge used at time of production it seems). All kinds of fan trouble (stuck fans, worn bearings, inoperative motors, soccer hooligans...). Some other things I have not thought of. Also see the advice I solicited here a few weeks ago about bringing up a 500 series (a 555 in that case, which I have since then powered up but not gotten completely operational yet...)
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Re: Acquisition of 535A and 581 - info for a 7000-er?
Bill R
Christian,
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BAMA has the 585 manual. A 581 is like a 585 but has only one timebase. The vertical amps will be the same, and the power supplies will be very close. The one sweep on the 581 will be the same as "A" sweep on the 585. Right: To use letter series plug-ins with a 581 you need an adapter plug-in, type 81. The plug-in of choice for the 581 is the type 82, a dual channel. Single channel is type 86. Both 581 and 585 came in "A" versions. Good luck! Bill R Christian A Weagle wrote: Good day, |
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File - Posting Rules
Please edit any posts/replies to the list to
minimize quoted material to that required for continuity. Please do not send personal replies to the list. List replies go to the original sender by default. If you want to also reply to the list, use Reply-to-all (or whatever it's called in your mailer), or manually add the TekScopes address. Do this if your reply would be of interest to the list. Otherwise, just reply to the sender. Those congesting the list with with either of the above may have posting rights revoked. Only by following these simple rules will we have a "clean" archive. They also reduce inbox clutter, make digests much nicer to read, improve searches, and reduce the chance of having old messages deleted. To post to the group, mail to: TekScopes@... I occasionally get emails meant for the group mistakenly sent to TekScopes-owner@...! I just delete these, so please watch where you're sending... If you post or have posted to the Photos section, please make sure your files are fairly small (<100K). See the bottom of this message for further instructions. If you do not wish to belong to TekScopes, you may unsubscribe by sending an email to TekScopes-unsubscribe@... You may also visit the Yahoo web site to modify your subscription: Check out the files, links, and photos sections, and remember, you can search the group's archives from its home page, or when reading messages. The group's home is at: Regards, Michael Dunn Listowner, TekScopes Keeping Photos Small: There's no point uploading large images to the photos section, as Yahoo severely limits the size and quality that others can view them at. I reserve the right to delete oversize files without warning. Therefore: I would ask anyone who has uploaded large (>100K) files (you can see file sizes by selecting list instead of thumbnail view) to either: 1. Delete the full-sized version via Yahoo by first viewing it. There is then a link (top-center) that allows deletion. 2. Replace it with a reduced-size version. 3. Delete it. |
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slightly OT: HP 3589A Spectrum / Network Analyzer: Trace Math syntax
martin_u_fischer
Hello TekScope Community,
apologies for the slightly OT; please admit the following questions: I am looking for informations about Trace Math in the HP 3589A Spectrum / Network Analyzer. The Product Data Sheet merely mentions some characteristics of this feature. The HP 3589A Operator?s Guide downloaded the from the Agilent website doesn?t even mention this feature. Does anybody have any further informations about or experience with Trace Math syntax in this Model? Or do I miss a dedicated manual covering this topic? Any hint will be highly appreciated. Regards Martin mailto:Martin.Fischer@... |
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Re: Birdies on a 492....what's normal?
John Miles
There should be no birdies whatsoever except for the big one at 0 Hz. You
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have a problem (possibly bad cabling in the front end, although what local signals would be coming through at 41 MHz and 300 MHz, I don't know...) Interrupt the RF signal path (as recommended in my earlier reply) until you see where they're coming from. -- john, KE5FX -----Original Message----- |
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Re: Birdies on a 492....what's normal?
Luis Cupido
Exactly, that is why I'm asking.
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because for no input my 492 is absolutely clean in the range 0 to 1.8GHz. lc. ----- Original Message -----
From: "arthurok" <arthurok@...> To: <TekScopes@...>; "Luis Cupido" <cupido@...> Sent: Thursday, February 01, 2007 5:26 PM Subject: Re: [TekScopes] Birdies on a 492....what's normal? i normally look for birdies with no input "shorted with a terminator" when checking a radio receiver or spec ana |
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Re: Birdies on a 492....what's normal?
arthurok
i normally look for birdies with no input "shorted with a terminator" when checking a radio receiver or spec ana
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----- Original Message -----
From: Luis Cupido To: TekScopes@... Sent: Thursday, February 01, 2007 11:21 AM Subject: Re: [TekScopes] Birdies on a 492....what's normal? Chris, With what signal at the input ? Luis C. ct1dmk. ----- Original Message ----- From: "Chris Johnson" <strangequark65@...> To: <TekScopes@...> Sent: Thursday, February 01, 2007 4:55 PM Subject: [TekScopes] Birdies on a 492....what's normal? > I've got a 492 that I haven't had for very long and I'm still > exploring the possibilities with it. It has options 1,2, and 3. > > > It's a very clean performer and seems to meet its sensitivity specs > and is reasonably close to calibrated. > > > I do notice a few birdies in it, and while I don't expect any spetrum > analyzer to be entirely free of birdies, I'd just like to know if the > ones I'm seeing in this unit are about normal. > > > Of course it has some noise below 100 MHz. I see a spur at about 34 > MHz that's about 20 dB above the noise floor with the video filter set > to narrow. > > At 41 MHz, there's another spur that's about 15 dB above the noise floor. > > At 50 MHz, +25 dB. > > At 69 MHz, +8 dB. > > At 75 MHz, +12. > > At 85 MHz, +19 > > At 93 MHz, +20. > > At 99 MHz, +18. > > At 100 MHz, +19. > > There's a big one at 300 MHz, +25. > > At 350 MHz, +20. > > At 400 MHz, +10. > > At 500 MHz, +10. > > Below 100 MHz, there are smaller spurs between the larger ones, > typically less than 10 dB above the noise floor. > > Above 500 MHz, it's very clean. > > The apparent magnitude of the spurs does vary somewhat according to > the span and resolution in use. > > All figures reported are in minimum noise mode with the ref level and > attenuation adjusted to as to yield the largest apparent magnitude > of the spurs. > > > So is this about right for a 492 or is it more in need of calibration > (or even repair) than I thought? > > > CJ > > > > > > Yahoo! Groups Links > > > |
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Re: Birdies on a 492....what's normal?
Luis Cupido
Chris,
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With what signal at the input ? Luis C. ct1dmk. ----- Original Message -----
From: "Chris Johnson" <strangequark65@...> To: <TekScopes@...> Sent: Thursday, February 01, 2007 4:55 PM Subject: [TekScopes] Birdies on a 492....what's normal? I've got a 492 that I haven't had for very long and I'm still |
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Birdies on a 492....what's normal?
Chris Johnson
I've got a 492 that I haven't had for very long and I'm still
exploring the possibilities with it. It has options 1,2, and 3. It's a very clean performer and seems to meet its sensitivity specs and is reasonably close to calibrated. I do notice a few birdies in it, and while I don't expect any spetrum analyzer to be entirely free of birdies, I'd just like to know if the ones I'm seeing in this unit are about normal. Of course it has some noise below 100 MHz. I see a spur at about 34 MHz that's about 20 dB above the noise floor with the video filter set to narrow. At 41 MHz, there's another spur that's about 15 dB above the noise floor. At 50 MHz, +25 dB. At 69 MHz, +8 dB. At 75 MHz, +12. At 85 MHz, +19 At 93 MHz, +20. At 99 MHz, +18. At 100 MHz, +19. There's a big one at 300 MHz, +25. At 350 MHz, +20. At 400 MHz, +10. At 500 MHz, +10. Below 100 MHz, there are smaller spurs between the larger ones, typically less than 10 dB above the noise floor. Above 500 MHz, it's very clean. The apparent magnitude of the spurs does vary somewhat according to the span and resolution in use. All figures reported are in minimum noise mode with the ref level and attenuation adjusted to as to yield the largest apparent magnitude of the spurs. So is this about right for a 492 or is it more in need of calibration (or even repair) than I thought? CJ |
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Acquisition of 535A and 581 - info for a 7000-er?
Good day,
A friend of mine has offered me two tube scopes of unknown provenance, he believes however that they are not working. They are Type 581 Serial #001067 Type 535A Serial #025668 BAMA has provided me with manual for the 535A (even seems to be the right vintage), but I came up short on the 581 - any pointers? I don't know what/if any plugins will be coming (the scopes are currently a long way away from both of us). This will be my first foray into the earlier offerings from Tek. I understand that both of these scopes will use letter and 1-series plugins, the 581 needing the 81 adapter. Any other gotchas? I will of course peruse the archives, but I would welcome any tips useful to someone used to working on 7000-era gear. Ahh, yes, I know that the voltages tend to be a bit higher, and that I probably could stand to get a 100x probe! |
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