Hi Jeremy I fully understand your point—but after been buying from them some years I have no problem with it---even returned an faulty ?MXA without extra cost…and got a new one. They actually sell well performing MXA`s,not just xp op sys. But You are right-they seem to very be relaxed with pictures of the units they want to sell…. So ask for specific pictures of the goods you want to buy…And multiple accounts?—yes that’s right!dont know exactly why. But bottom end – I still deal with them-no problem for me. Regards Hardy ? ? I'd advise some caution here. It looks like the same ebay seller could be using 6 or 7 different ebay accounts to sell MXA analysers all with the same title and pictures.
Also, the ebay description is misleading from every 'seller'. It could be interpreted that the seller is actually only selling the XP operating system used by the MXA analyser.
I'd recommend you ask the seller what they are actually selling.
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Peter It depends on what you want....but the N9020A are part of the X-series known to be a first class series--the units sold at e,,,, are MXA N9020A 506-3.6Ghz option B25.....and some with several options as Noise Figure,,-Phase-Noise,,Demod AM-FM,PM-Display Enhancement(Full sweep spectrogram)...all sorts digital demod------and pre-installed VSA 89600 software with no license(ver.14.02)This software have a inbuilt front-end converter function...and much more.So Peterif you consider this- you can use your HP856x as a front-end if you need to go very high-calibrated.. So yes its at least a very competent SA,... --its one of the best today-----! Hardy -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af Peter Gottlieb Sendt: 19. april 2024 13:38 Til: [email protected]Emne: Re: [HP-Agilent-Keysight-equipment] N9020A Is this model that much better than the older units like the 8566B? Peter On 4/19/2024 3:12 AM, rftek.ltd via groups.io wrote: There seems to be a bunch of N9020A's available on the usual auction
site mostly from CH and wonder if anyone has any thoughts as to why
they've suddenly appeared?
Maybe they've been there all along and I just didnt notice?
Anyone ever purchased one?
Anyway I've taken a punt and purchased one which seems to have most of
the useful stuff installed except RTSA which I'd be very interested to
know how to implement.
Your thoughts?
Regards
Stretchy
-- Denne mail er blevet tjekket for vira af AVG-antivirussoftware. www.avg.com
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I'd advise some caution here. It looks like the same ebay seller could be using 6 or 7 different ebay accounts to sell MXA analysers all with the same title and pictures.
Also, the ebay description is misleading from every 'seller'. It could be interpreted that the seller is actually only selling the XP operating system used by the MXA analyser.
I'd recommend you ask the seller what they are actually selling.
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Is this model that much better than the older units like the 8566B?
Peter
toggle quoted message
Show quoted text
On 4/19/2024 3:12 AM, rftek.ltd via groups.io wrote: There seems to be a bunch of N9020A's available on the usual auction site mostly from CH and wonder if anyone has any thoughts as to why they've suddenly appeared?
Maybe they've been there all along and I just didnt notice?
Anyone ever purchased one?
Anyway I've taken a punt and purchased one which seems to have most of the useful stuff installed except RTSA which I'd be very interested to know how to implement.
Your thoughts?
Regards
Stretchy
|
Thanks Hardy, ah, I mistakingly thought it was a SW option so no chance of RTSA then, no worries.
Many thanks for the info.
Regards
Stretchy
|
Hi The N9020A`s on ebay from CN are so far a great deal—but if you want a unit with RTSA, ?you will ?not get it from these sellers,as they get them from CN mobile factories.Its a hardware option,and are very expensive.The units they sell are all with option B25—25Mhz BW digital IF-14 bits—very fine for most work. Hardy ? ? There seems to be a bunch of N9020A's available on the usual auction site mostly from CH and wonder if anyone has any thoughts as to why they've suddenly appeared?
Maybe they've been there all along and I just didnt notice?
Anyone ever purchased one?
Anyway I've taken a punt and purchased one which seems to have most of the useful stuff installed except RTSA which I'd be very interested to know how to implement.
Your thoughts?
Regards
Stretchy
|
HP8510C how are raw uncorrected s-parameters computed?
Hi,
does anybody happen to know, how the 8510C computes raw uncorrected s-parameters from the receiver signals a_i and b_i forward and reverse?
Thanks,
Tom
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Nice, but I must read it on-screen ask the black background does not agree with my printer :)
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There seems to be a bunch of N9020A's available on the usual auction site mostly from CH and wonder if anyone has any thoughts as to why they've suddenly appeared?
Maybe they've been there all along and I just didnt notice?
Anyone ever purchased one?
Anyway I've taken a punt and purchased one which seems to have most of the useful stuff installed except RTSA which I'd be very interested to know how to implement.
Your thoughts?
Regards
Stretchy
|
Re: Scan From 1404A Amplifier Manual
Jeremy,
I went back and looked at the listing and that one has a 1405A amplifier, not a 1404A.? That amplifier does, however, have CHOP mode so it may still be a worthwhile test.
Thanks again, Barry - N4BUQ
Jeremy, The reason I'm looking into those waveforms is that when I switch the amplifier to CHOP mode, the traces become a bit "fat".? It appears there's some sort of high-frequency noise that's causing the traces to appear fatter in the negative direction - i.e. the trace is there but there's a wider "shadow" on the negative side of the trace.? I was thinking it was probably the chop multi-vibrator getting into the power rails and that still might be it; however, I'm also wondering if the blanking between the chopping action might not be working properly which could cause that ghosting effect. If I recall, the scope you obtained recently is configured just like mine with a 1421A time-base and a 1404A vertical amplifier.? If so, if you select at least two channels and select CHOP mode, do your traces change - especially do they become fatter?? I'm thinking they probably do not and there's something wrong with my scope/plugin but I'm curious to find out whether you see that same behavior and, if so, it could be an anomaly of these scopes (doubtful). Thanks, Barry - N4BUQ I have that manual. Let me check.
Would anyone have the manual for the 1404A 4-channel amplifier plugin?? I would like to see what the waveforms in Fig. 8-25 (Ring Counter Measurement Conditions and Waveforms) look like.? The online versions are pretty poor images and I can't really tell if what I'm seeing - particularly for #4 - are what they should be and a decent picture would really help.
Thanks,
Barry - N4BUQ
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Re: Scan From 1404A Amplifier Manual
Jeremy,
The reason I'm looking into those waveforms is that when I switch the amplifier to CHOP mode, the traces become a bit "fat".? It appears there's some sort of high-frequency noise that's causing the traces to appear fatter in the negative direction - i.e. the trace is there but there's a wider "shadow" on the negative side of the trace.? I was thinking it was probably the chop multi-vibrator getting into the power rails and that still might be it; however, I'm also wondering if the blanking between the chopping action might not be working properly which could cause that ghosting effect.
If I recall, the scope you obtained recently is configured just like mine with a 1421A time-base and a 1404A vertical amplifier.? If so, if you select at least two channels and select CHOP mode, do your traces change - especially do they become fatter?? I'm thinking they probably do not and there's something wrong with my scope/plugin but I'm curious to find out whether you see that same behavior and, if so, it could be an anomaly of these scopes (doubtful).
Thanks, Barry - N4BUQ
I have that manual. Let me check.
Would anyone have the manual for the 1404A 4-channel amplifier plugin?? I would like to see what the waveforms in Fig. 8-25 (Ring Counter Measurement Conditions and Waveforms) look like.? The online versions are pretty poor images and I can't really tell if what I'm seeing - particularly for #4 - are what they should be and a decent picture would really help.
Thanks,
Barry - N4BUQ
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See HP cat for TR sets and couplers, both 50and 75 should exit
We used the S parameter test set often include with 3577.
Jon
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Did the 3577A have a separate instrument
for 75 Ohms, or did the 3577A have an option for 75 Ohms?
Is the conversion as simple as remove a minimum loss attenuator
and change the connectors from 75 to 50 Ohms?
Thanks
Glenn
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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Re: HP8560a smoke came out
It would be interesting
to look up information on a quenched arc. The winding of the
condenser and the unconsumed dielectric could form a tuned
circuit as they are destroyed.
?? Bruce Gentry, KA2IVY
On 4/18/24 18:47, Morris Odell wrote:
toggle quoted message
Show quoted text
I had a CFL lamp fail spectacularly here in 240 volt land. Autopsy
revealed a greencap had self-immolated and destroyed most of the
electronics in the base as well as some of the connecting wires. .
It was impossible to read any of the markings on it. It's
surprising how much energy can get through before a fuse or
breaker operates!
Morris
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Re: HP8560a smoke came out
I had a CFL lamp fail spectacularly here in 240 volt land. Autopsy revealed a greencap had self-immolated and destroyed most of the electronics in the base as well as some of the connecting wires. . It was impossible to read any of the markings on it. It's surprising how much energy can get through before a fuse or breaker operates!
Morris
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Re: Question Regarding Blanking in HP-1404A/140B
In an attempt to answer my own question, the chopped blanking signal from the 1404A is connected in the 140B to the junction of a 4700pF capacitor and a 1M resistor and the other end of that resistor is tied to ground.? Is that falling, curvy, part of the waveform the discharging of that capacitor through that resistor and is, thus, normal here?
Thanks, Barry - N4BUQ
Could someone please tell me what a proper blanking signal from an HP-1404A vertical amplifier in an HP-140B should look like?? I took a look at mine (image below) and I'm not sure what I'm seeing is correct.? This was taken when the amplifier is in CHOP mode. Should the falling part of the waveform be "slow" like that?? I don't think I've ever looked at the blanking signals for any of my scopes so I don't have anything which to reference that and would like to know whether this is correct or indicative of any problems.? I suppose I expected to see more of a pulsed and squarer waveform but maybe not. Thanks,
Barry - N4BUQ
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Question Regarding Blanking in HP-1404A/140B
Could someone please tell me what a proper blanking signal from an HP-1404A vertical amplifier in an HP-140B should look like?? I took a look at mine (image below) and I'm not sure what I'm seeing is correct.? This was taken when the amplifier is in CHOP mode.
Should the falling part of the waveform be "slow" like that?? I don't think I've ever looked at the blanking signals for any of my scopes so I don't have anything which to reference that and would like to know whether this is correct or indicative of any problems.? I suppose I expected to see more of a pulsed and squarer waveform but maybe not.
Thanks,
Barry - N4BUQ
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HP 3585A Early SN info needed
I have an early SN 3585A on the bench that is needing calibration after I repaired one of the IF cards. ?This unit uses the original A11, A12, A13 version of the cards. ?everything that I can find from all the usual sources online only gives alignment procedure and schematics for the A17, A18, A19 replacement cards. ?So far queries to Keysight/HP have gone unanswered. ?Would anyone happen to have the alignment info available? ?The card sets are different enough that the procedure in the later manuals makes no sense.
--
Tim Wright
Senior Engineer
Cumulus Media Chicago WLS-AM
AL7DS
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Re: Agilent ESA L1500A / E4411A spectrum analyzer password for service menu?
-2010 is the password for ESA-E series.
On April 18, 2024 5:23:35 AM UTC, "G H via groups.io" <gkhoefer@...> wrote:
Hello Group,
I recently acquired an Agilent ESA L1500A E4411A spectrum analyzer. And I have a question regarding the service selection on one of the menu options.
And while going through the menus I selected the service choice and it asked for a password. Does anybody know this password? I didn't select anything, I just backed out of this choice.
Nice machine so far. It has options, 1DN, A4H, and A4J.
Thanks in advance.
George
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Re: Scan From 1404A Amplifier Manual
Perfect! That's what I was looking for.
Thank you again,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "ChuckA" <chuck@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Thursday, April 18, 2024 9:10:11 AM
Subject: Re: [HP-Agilent-Keysight-equipment] Scan From 1404A Amplifier Manual The original picture (original manual) is hard to read also but it
appears to be 8volts.
Try this scan.
Chuck
On 4/18/2024 8:46 AM, n4buq wrote:
Thank you. I can see that one a bit better. I couldn't see the amplitude of
the waveform in picture 4. Do you have the original manual? If so, can you
see the graticule lines in those waveforms? I know it's 2V/DIV but I still
can't tell how much amplitude is shown.
Thanks!
Barry - N4BUQ
--
See Early TV at:
www.myvintagetv.com
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Anders
Froggie the Gremlin
Tim Wright