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Re: IFR A-7550 Spectrum Analyzer question
On Thu, Oct 09, 2008 at 06:15:05PM -0000, georgeplhak wrote:
Sorry if I offend anyone by asking in Tekscopes about these fineThese use the internal 100 MHz at -30 db calibrator to check for sensitivity, gain calibration, log tracking (by switching the main atten in and out)... as far as I know the fail is not latching, but I have never seen a fail so I am not sure... I myself would be curious as to whether there is a way to get the results specifically - there is for some of my other SAs... -- Dave Emery N1PRE/AE, die@... DIE Consulting, Weston, Mass 02493 "An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either." |
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IFR A-7550 Spectrum Analyzer question
georgeplhak
Sorry if I offend anyone by asking in Tekscopes about these fine
Aeroflex/IFR instruments, but there are so many knowledgeable folks that hang out here! I'm trying to figure out what the "CAL" self test is testing and how to reset it. Mine gives "F". I suspect that it is a time derived flag and can be reset somehow. I have been through the calibration procedure and the service manual and I can't find any mention of the CAL or RF self tests, other than how to trigger them thru the menus. What do you do, what do you look for when you have a fail on either of these two test? Thanks if you can help! George in Acton, Ontario, Canada |
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Plot 10 / TCS / AGII software?
John Rehwinkel
A long time ago, I used Tektronix's ForTran plotting software, first
with a 4010, then with a VT-100 retrofit to support the Tektronix graphics commands. Years later, I found out that Tektronix had release the source code for it, and I played with it some more. It has lots of commands (like SLIMX to reduce the size of a plot in the X direction) to customize its output. In any case, I've lost my copy of it. Does anyone have access to the old ForTran Plot-10 Advanced Graphing source code? I've struck out doing web searches, although I did find a PDF of the sales documentation: ¨C John |
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Re: ebay auctions ...
I bought a load of these on ebay and some 7623/33/03's, 18 in all from a
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local university for the same price. It was within driving distance though. I would shop around some more. In a message dated 10/8/2008 3:22:11 P.M. Eastern Standard Time,
ebay@... writes: This unit looks very beat up to me. And Tampa is on the ocean, the salt air might have got to it.Might be worth a try if you did not have to pay shipping, but you can probably do much better for under $100. ------------------------------------ Yahoo! Groups Links ****New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & more. Try it out! () |
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Re: 535A stood on its end
On 2008-10-06 10:45 +0100, Craig Sawyers wrote:
Thanks everyone. My 535A has started misbehaving again and I wasHello all. Are there any known problems with using a 535A inOther than cooling (ie ensuring that the fan intake is not wondering if that could be the reason. Maybe it's an intermittent contact in the 1A1 edge connector. I'll have to investigate... -- Andr??? Majorel <URL:> Do not use this account for regular correspondence. See the URL above for contact information. |
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Re: 535A stood on its end
Geoff Blake
On Mon, 6 Oct 2008, Andre Majorel wrote:
Hello all. Are there any known problems with using a 535A inYes, the fan suck dust and fluff from the floor necessitating frequent cleaning of the filter - otherwise no problems that I am aware of. Geoff -- Geoff Blake G8GNZ located near Chelmsford, Essex, U.K. Please reply to: geoff(at)palaemon(dot)demon(dot)co(dot)uk Using Linux on Intel & Linux or NetBSD on Sun Sparc platforms Please avoid sending me Word or PowerPoint attachments. See <> ------------------------------------------------------------------------------ This E-mail and any attachment(s) are strictly confidential and is intended solely for the addressee(s). If you are not the intended recipient please notify <postmaster(at)palaemon.co.uk> and the sender by return and permanently delete the message. You may not disclose, forward or copy this E-mail or any of its attachments to any third party without the prior consent of the sender. ------------------------------------------------------------------------------ |
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Re: Manuals needed for the following scopes
There's the 2246 operator's manual off this fellows page.
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I've never seen the service manual for the 2246 available "free" online anywhere. (Though I wouldn't mind finding one. - If for no other reason to flip through) David On Tue, Oct 7, 2008 at 12:37 PM, Doug hale <Tektronix@...> wrote:
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Re: Manuals needed for the following scopes
Doug hale
thepinkfloyd67 wrote: I am in need of manuals for the following scopes: |
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Re: 535 over blanked?
Dave Casey
Are the measurements accurate for what you see, or is the trace compressed?
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Dave Casey ----- Original Message -----
From: George To: TekScopes@... Sent: Tuesday, October 07, 2008 9:29 AM Subject: [TekScopes] 535 over blanked? Greetings to the groupe, I have a 545 that has two or three graticuls of trace and the rest is blanked. How can I make more graticuls available?? Thanks in advance, George |
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Re: Massachusetts surplus
Scott McGrath
None in MA that I know of
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ESS in Manchester NH (Exit 6 off I-93N) take right off of exit and it's about a 1/2 mile on your left on Candia Road they have a substantial Ebay presence as well and you can pick up your Ebay stuff there and not risk damage in shipping. Store has Electronic parts (new), industrial surplus, racks and power supplies most of the 'good' test gear goes to ebay Peter Gottlieb wrote: Anybody know if there are any decent surplus stores left in MA? Like where they have Tek or HP gear? |
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Re: 2430A CCD and PA fail... bad NVRAM?
Hi,
I hope this post isn't bad new for your but here goes: Make sure you point an external fan at the CCD when running outside the cover. Even 10 minutes of operation with the CCDs being cooled is enough to destry them. I hope you have a 2430A abover serial number B015xxx, anything below that is going to be painful. Also, the usual CCD failure will not really show up until you use REPET mode. You see this on ebay all the time "This scope has CCD failures but I input a signal and it works great!" Yeah, at 1ms/Div. Try a fast signal and using 100ns/Div or faster. --Victor |
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Re: 535A stood on its end
I don¡¯t think the 535A cares what position it is in as long as the air flow
through the fan filter is not restricted. Stan _____ From: TekScopes@... [mailto:TekScopes@...] On Behalf Of Andre Majorel Sent: Monday, October 06, 2008 1:25 AM To: TekScopes@... Subject: [TekScopes] 535A stood on its end Hello all. Are there any known problems with using a 535A in vertical position, i.e. with the fan at the rear looking down and the front panel looking up ? -- Andr¨¦ Majorel <URL:. <> fr/~amajorel/> Do not use this account for regular correspondence. See the URL above for contact information. [Non-text portions of this message have been removed] |
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Re: Obsolete part needed for repair
It is a 5082-3081, currently manufacturer by Avago. It is available in single quantities from Farnell and Mouser.
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Regards, Javier, EA1CRB thepinkfloyd67 escribi???:
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------------------------------------------------------------------------ Javier Herrero EMAIL: jherrero@... HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17A FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: |
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Obsolete part needed for repair
Does anyone know where I can locate the following obsolete part?
HP3081 If not, can you provide me with a data sheet that I can use to find a suitable cross reference? The part is not for a Tektronix Scope, it is a pin diode used in a Advantage Instruments SA1300C Spectrum analyzer that I am repairing. There are 2 diodes in series connected to the input of the spectrum analyzer (both HP3081's). Unfortunately, 1 has blown and I would like to get a few of these in case of future problems. So far the only places I can find them are places that locate obsolete parts like USBID, but they have a $250 minimum order. Does anyone know of a suitable replacement for this? I figured that it was worth a chance asking here, since there are many knowledgeable people here that repair such equipment. |
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