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Re: HP-7550 Plotter with HP-8568B
Hi Glen, TU very much for that ! ?Super. ?I tried searching yesterday and came across that site but every page I tried to pull up got me an error or time out message so I just assumed the link was no longer active and dead. ?I will try it again......maybe the museum was just having a bad day. ?TU again !
Gedas |
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Re: HP-7550 Plotter with HP-8568B
On Fri, Oct 23, 2015 at 6:33 PM, w8bya@...
[hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
7550 - Documentation SmallFormatPlottersProductBrief-5952-2214-8pages-Jul90.pdf SmallPlotterSuppliesCables-5954-7106-8pages-May86.pdf HPJournal1985Apr-7550-15pages.pdf 7550TechData-5953-9722-8pages-Apr84.pdf 7550A-OperationAndInterconnectionManual-07550-90002-163pages-Oct84.pdf 7550A-ServiceManual-07550-90000-175pages-Jan86.pdf 7550A-InterfacingAndProgrammingManual-07550-90001-483pages-Jan86.pdf 7550A_TechnicalData_5954-7084_4pages_Feb89.pdf 7550A_LiteratureFolder_5953-9798_2pages_Dec84.pdf 7550A_SalesGuide_5953-9795_17pages_Jan85.pdf 7550B_HardwareSupportManual_07550-90050_111pages_Sep93.pdf 7550A_PressRelease_15pages_Apr2-1984.pdf 7550Plus_ComputerInformation_07550-90052_173pages_Apr90.pdf 7550Plus_UsersGuide_07550-90051_129pages_Apr90.pdf |
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Re: HP-7550 Plotter with HP-8568B
Hi Tim.....I have the manual for the HP-8568B and know how to change it's HP-IB address but I have not been able to locate The Operation and Interconnection?Manual for the 7550A. ?I have the??doc but the interconnect document is the one that I am missing that will help me read what address the plotter is currently set to and how to change it to something different. ?There are no dip switches or dip-bank that I spotted on the back to allow me to easily alter that setting.
I wonder if anyone had the Operation and Interconnection document they could share with me. ?Thank you for helping out Tim. Gedas, W8BYA Gallery at Light travels faster than sound....? This is why some people appear bright until you hear them speak.? ? |
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Re: Fake NI-USB-HS adapters on ebay.
¿ªÔÆÌåÓýOn 10/23/2015 4:35 PM,
timhughes@... [hp_agilent_equipment] wrote:
488.2-2.1 as far as I can tell without turning it on again And frankly, I'd prefer if it doesn't complain :^)??? Ignorance is bliss. Dan |
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Re: HP-7550 Plotter with HP-8568B
I assume, you have configured addressing on units/printer as recomended by HP? Remember the two units making up the SA,talk together extensively and I seem to remember there are some assumptions about the particular addresses and how they are connected on local 488 bus.? Tim Hughes From: "w8bya@... [hp_agilent_equipment]" To: hp_agilent_equipment@... Sent: Thursday, October 22, 2015 10:05 PM Subject: [hp_agilent_equipment] HP-7550 Plotter with HP-8568B
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Hello Group. ?I have been having a blast with my new to me HP-8568B SA, and since I had an old HP-7550A plotter available, I thought it would be fun to see if I could get them connected together and get some hard copies plotted. My plotter has both an HP-IB and RS-232 interface and thus I have connected the two instruments together with an HP HP-IB interface cable I assume is good. ?I am not having much luck in knowing where to go next as far as configuring either the plotter or SA to make them see and talk to each other. I have DL the manual for the SA but not for the plotter yet and have not read the SA yet WRT plotter operations. Is there anyone who can work with me on or off-line to get these two working together? ?TU. Gedas, W8BYA Gallery at Light travels faster than sound.... This is why some people appear bright until you hear them speak. |
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Re: Fake NI-USB-HS adapters on ebay.
Remember, When checking if the driver complains, it is only the latest version driver that can detect and report the clones. Which driver rev were you using? Tim Hughes From: "Dan Rae danrae@... [hp_agilent_equipment]" To: hp_agilent_equipment@... Sent: Friday, October 23, 2015 4:12 PM Subject: Re: [hp_agilent_equipment] Fake NI-USB-HS adapters on ebay.
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On 10/3/2015 5:11 PM, 'John Miles'
john@... [hp_agilent_equipment] wrote:
I will echo exactly John's experience with one of these "used" adapters from China, it works fine with the 3048A software, and no warnings from the NI driver either.? It has been the easiest install with my 3048A system, quite a contrast to my attempts to get both an -hp- card and an -hp- USB adapter to work on an XP computer. I'm a happy emptor! Dan |
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Re: Fake NI-USB-HS adapters on ebay.
¿ªÔÆÌåÓýOn 10/3/2015 5:11 PM, 'John Miles'
john@... [hp_agilent_equipment] wrote:
I will echo exactly John's experience with one of these "used" adapters from China, it works fine with the 3048A software, and no warnings from the NI driver either.??? It has been the easiest install with my 3048A system, quite a contrast to my attempts to get both an -hp- card and an -hp- USB adapter to work on an XP computer. I'm a happy emptor! Dan |
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Re: HP8640B -140/+10dBm instead of -130/+20dBm?
Hurray! Someone benefited from my OCD moment. :)
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-----Original Message-----
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sent: Friday, October 23, 2015 1:04 AM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] HP8640B -140/+10dBm instead of -130/+20dBm? Thanks Dave, I've annotated my paper copy. Cheers, On 23/10/2015, at 11:08 AM, David Wise david_wise@... [hp_agilent_equipment] wrote: On Figure 16, page 10, the traces are mislabeled. The black traces are the 608, while the blue traces are the 8640. ------------------------------------ Posted by: Andy Gardner <ceo@...> ------------------------------------ ------------------------------------ Yahoo Groups Links |
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HP-8640B AM pulse modulation
Hi all,
following the recent thread about lowering the IMD of the HP-8640B turning off the ALC or using a dc level with AM pulse modulation, I've tried on both my 8640Bs to set AM slide to pulse and injecting a dc level into the AM BNC, but the output level on the panel meter never moves, as if I would turn off the output switch. I've tried different dc levels, up to a few volts and rotating the AM modulation knob, but nothing seem to have effect. Are both of my generators broken in the same way or I just don't understand how this is supposed to work? Thanks in advance and best regards Frank IZ8DWF |
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Re: HP 8341A power supply schematics
I will not stand on my head for this one but I have a suspicion the 40 and 41 supplies are the same.
Link to 8340B power supply drawing is much clearer than the 8341A drawing.<<< Dennis -------------------------------------------- On Fri, 10/23/15, on1ev@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: Subject: [hp_agilent_equipment] HP 8341A power supply schematics To: hp_agilent_equipment@... Date: Friday, October 23, 2015, 2:29 PM HI, all the HP lovers, I have received an HP 8341A with a bad? power supply , +12 V is missing as well the +5.2 V ,the schematics and the flowchart as an aid to troubleshoot the power supply?available on the web are unreadable .Is there a good soul with decent schematic to help me ?please sent it to ONE1V at yahoo.fr.Best regardsON1EVGuy |
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HP 8341A power supply schematics
HI, all the HP lovers, I have received an HP 8341A with a bad? power supply , +12 V is missing as well the +5.2 V ,the schematics and the flowchart as an aid to troubleshoot the power supply?available on the web are unreadable . Is there a good soul with decent schematic to help me ? please sent it to ONE1V at yahoo.fr. Best regards ON1EV Guy |
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Re: HP8640B -140/+10dBm instead of -130/+20dBm?
The ALC pulling or modulation of the loop created IM in itself, hence it is worth doing. I know because I have measured the condition for both cases. There is little one can do because of the PIN attenuator system but that is a secondary IM contribution. On the 40's I have it is straight forward to accomplish, may be different in earlier models. On Friday, October 23, 2015 9:20 AM, "Alan Ibbetson alan@... [hp_agilent_equipment]" wrote:
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A friend of mine used to work as a design engineer for HP at Queensferry
in the UK, though he didn't himself work on the 8640B. I asked him about turning off the ALC versus using external attenuators and couplers. He said --- Turning off the ALC fixed ALC pumping. It doesn¡¯t fix the diode nonlinearity from the detector influencing the output by being a non-linear load, nor the non-linearity of the output amp. Yes, a coupler with >=40dB isolation would be good. Snag is that broadband HF ones use transformers, and to get higher frequency coverage drives the designers to scoddy little cores. Ferrites do intermod too, so finding a low intermod coupler is difficult. --- The Clifton Labs website that Thomas referenced has details of couplers that don't have significant IMD so that is the path I am going to choose, leaving the inconvenience of ALC disabling for the day when I can build receivers with substantially more than 100dB IMD dynamic range. Thanks, Alan G3XAQ |
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Re: Spectrum analyzer choice between ESA and PSA
¿ªÔÆÌåÓý°ä³ó°ù¾±²õ¡ ? Unless you need the portability, I¡¯d take the PSA over the ESA any day. ? Much better performance including lower noise floor and phase noise, faster, more accurate amplitude measurements, and fewer adjustment pots to give trouble (they¡¯re all electronic memory values now!). ? The only concern would be the condition, as the PSA generally is a much more expensive box so a cheap one could prove to be a problem.. ? Tom Holmes, N8ZM ? |
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Re: HP8640B -140/+10dBm instead of -130/+20dBm?
A friend of mine used to work as a design engineer for HP at Queensferry in the UK, though he didn't himself work on the 8640B. I asked him about turning off the ALC versus using external attenuators and couplers. He said
--- Turning off the ALC fixed ALC pumping. It doesn¡¯t fix the diode nonlinearity from the detector influencing the output by being a non-linear load, nor the non-linearity of the output amp. Yes, a coupler with >=40dB isolation would be good. Snag is that broadband HF ones use transformers, and to get higher frequency coverage drives the designers to scoddy little cores. Ferrites do intermod too, so finding a low intermod coupler is difficult. --- The Clifton Labs website that Thomas referenced has details of couplers that don't have significant IMD so that is the path I am going to choose, leaving the inconvenience of ALC disabling for the day when I can build receivers with substantially more than 100dB IMD dynamic range. Thanks, Alan G3XAQ |
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Re: HP8640B -140/+10dBm instead of -130/+20dBm?
Andy Gardner
Thanks Dave, I've annotated my paper copy.
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Cheers, On 23/10/2015, at 11:08 AM, David Wise david_wise@... [hp_agilent_equipment] wrote:
On Figure 16, page 10, the traces are mislabeled. The black traces are the 608, while the blue traces are the 8640. |
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HP-7550 Plotter with HP-8568B
Hello Group. ?I have been having a blast with my new to me HP-8568B SA, and since I had an old HP-7550A plotter available, I thought it would be fun to see if I could get them connected together and get some hard copies plotted. My plotter has both an HP-IB and RS-232 interface and thus I have connected the two instruments together with an HP HP-IB interface cable I assume is good. ?I am not having much luck in knowing where to go next as far as configuring either the plotter or SA to make them see and talk to each other. I have DL the manual for the SA but not for the plotter yet and have not read the SA yet WRT plotter operations. Is there anyone who can work with me on or off-line to get these two working together? ?TU. Gedas, W8BYA Gallery at Light travels faster than sound.... This is why some people appear bright until you hear them speak. |
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Re: HP8640B -140/+10dBm instead of -130/+20dBm?
Dave Brown
Alan-
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Not used 8640s for many years so can't answer your query, sorry. Your figures make sense to me, BTW. But check the hybrid isolation at the highest frequency you're going to test at. If you're looking at SDR rx testing, as opposed to conventional rx architectures- you might like to check this out- implementation depends on whether you can get hold of some old white noise gear. 73 Dave, ZL3FJ ----- Original Message -----
From: "alan@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: <hp_agilent_equipment@...> Sent: Friday, October 23, 2015 11:21 AM Subject: Re: [hp_agilent_equipment] HP8640B -140/+10dBm instead of -130/+20dBm? Thanks, guys. I see the ALC on/off switch S1 on board A26A4 in the manual but it involves opening the diecast box and maybe pulling the board out to toggle the switch, though it's at the top edge of the board and perhaps can be moved with a pointed stick. |
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Re: HP8640B -140/+10dBm instead of -130/+20dBm?
Thanks, guys. I see the ALC on/off switch S1 on board A26A4 in the manual but it involves opening the diecast box and maybe pulling the board out to toggle the switch, though it's at the top edge of the board and perhaps can be moved with a pointed stick.
The app note fig 14 suggests a hybrid with 40dB isolation will achieve the same result as disabling the ALC. My Hatfield Instruments 6dB hybrid shows 50dB isolation at 14MHz so I am inclined to go that route. Assuming everything is well behaved one might hope that keeping the generators at -10dBm (or maybe as high as 0dBm) would give spurs at least -100dBc, which is the minimum I need for evaluating 100dB DR receivers, and still give me 14dB or more attenuation to dial in with a step attenuator with receiver noise floors around -130dBm. Does anyone know just how low the IPs go if both the ALC is disabled and a combiner are used? Do my numbers look realistic, or have I made some idiot arithmetical error? Thanks, Alan |
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