Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
David, ? Programming considerations (MODULE CONFIGURATION) ? See 400 and 401 at ? The HP 70900 (A or B) local oscillator is the controlling device in the MMS address systems. ?Configuration wise I not sure you can ¡°slave¡± multiple IF and RF sections to the same LO.? Creating two groups and switching it between them is not practical as the address can only be changed by removing the LO from the mainframe and resetting the DIP switches. ? By the way there is some really good information about modules/components of the system, block diagrams and their operations e.g. Page 344. ? HARDWARE considerations (assuming you can MAP/slave two RF/IF combinations to one LO.) ? See page 1-3 in ? If you have only one LO and you want to control two separate analysers then you need use the two 300MHz ports to supply that signal to both RF frontends and switch the following ? 1/ the LO output between the RF front ends 2/ the tune span control between two RF front ends 3/ the video out from the IF(s) in use back into the LO section for processing. ? To minimise the space used, you might consider just using use the 10Hz to 300kHz IF with the 2.9GHz frontend as sweep speed is reasonable. ? Have fun! ? Regards Noel ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Dr. David Kirkby from Kirkby Microwave Ltd
Sent: Saturday, 13 October 2018 5:27 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe? ? ? On Fri, 12 Oct 2018, 18:38 bownes, <bownes@...> wrote: You have to have an IF section. There are several choices.?
But the mainframe I bought from eBay has a 70902A IF unit, and I already have a couple of IF units on the 22 GHz front end. So perhaps something like 1) Remove a partially working power? sensor to free up a slot, giving me four free slots. 2) Split or switch output of local oscillator 3) Add in the 2.9 GHz RF section,??70902A IF unit, 2.9 GHz preamp and preselector. I only have one preselector, so have no idea if that could be used with both RF units or just one. I could suffer just one.? I assume an address of a?70902A would need changing, as I would have two identical modules.? Does that sound workable??
On Oct 12, 2018, at 13:34, Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> wrote:
On Fri, 12 Oct 2018 at 18:15, pianovt via Groups.Io <pianovt=[email protected]> wrote: The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You would have to reconnect those cables on the back of the system. I don't know what your application is, but keep in mind that the noise performance of the system is degraded at the low frequency end.
Vladan
? I was not aware about the noise. I can't go into the application unfortnately. The unit I bought does have an 10 Hz to 300 kHz IF section, so could add an IF module. From page 11 of the note someone posted,
it looks like this may be doable if the LO is amplified and split. I could consider a simple switch, or might just get away with a splitter, at some degraduable in performance. It would mean pulling out one of my power sensors, but since one does not zero well, and I have a decent power meter, that is no big deal. I can live with that. Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Oh yes. The mainframe has plenty of oomph. There are many other modules besides SA that you may put in a single system.
For example, one of Mine has the 70004 display and two 70001 mainframes supporting an SA, a Microwave Transition Analyzer, a few power meters and a 1-20GHz signal generator.?
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On Oct 12, 2018, at 14:40, nigel adams < nigel.adams@...> wrote:
Are you sure the internal mainframe psu can cope wth two potentially power hungry SA's?
This may preclude the worry of IF's...
Regards
Sent from Samsung by banging a nail into a piece of wood.
-------- Original message --------
From: "Dr. David Kirkby from Kirkby Microwave Ltd"
Date:12/10/2018 19:27 (GMT+00:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
On Fri, 12 Oct 2018, 18:38 bownes, < bownes@...> wrote:
You have to have an IF section. There are several choices.?
But the mainframe I bought from eBay has a 70902A IF unit, and I already have a couple of IF units on the 22 GHz front end. So perhaps something like
1) Remove a partially working power? sensor to free up a slot, giving me four free slots.
2) Split or switch output of local oscillator
3) Add in the 2.9 GHz RF section,??70902A IF unit, 2.9 GHz preamp and preselector. I only have one preselector, so have no idea if that could be used with both RF units or just one. I could suffer just one.?
I assume an address of a?70902A would need changing, as I would have two identical modules.?
Does that sound workable??
Dave.?
On Oct 12, 2018, at 13:34, Dr. David Kirkby from Kirkby Microwave Ltd < drkirkby@...> wrote:
On Fri, 12 Oct 2018 at 18:15, pianovt via Groups.Io <pianovt= [email protected]> wrote:
The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You would have to reconnect those cables on the back of the system.
I don't know what your application is, but keep in mind that the noise performance of the system is degraded at the low frequency end.
Vladan
I was not aware about the noise. I can't go into the application unfortnately.
The unit I bought does have an 10 Hz to 300 kHz IF section, so could add an IF module. From page 11 of the note someone posted,
it looks like this may be doable if the LO is amplified and split. I could consider a simple switch, or might just get away with a splitter, at some degraduable in performance. It would mean pulling out one of my power sensors, but
since one does not zero well, and I have a decent power meter, that is no big deal. I can live with that.
?
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: HP 8642B develops issues when warming up
Although I am not about to place the boards of the 8642B into an oven, I have a video which you might find interesting that discusses the oven trick I discussed previously.
This video is a link to Youtube, there is some language so be advised.
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Re: Can I capture a missed pulse with an old HP 54501A scope?
It looks to me that the pattern trigger mode should be able to do what you want. I have caught glitches many times but never used that scope. I might suggest that you set up pattern trigger mode to trigger on the normal pulses, then adjust the trigger timing longer so it does not trigger and it hopefully will then trigger on the wider spaced pulses. Sorry I can't be more of a help but I suggest you play with it for a while and hopefully you can get it working. That scope looks like it has a pretty sophisticated trigger setup.
Regards,
Mark
On Fri, Oct 12, 2018 at 7:08 AM Chris Wilson < chris@...> wrote: ? ?Hello Tam,
?Friday, October 12, 2018
?It is pretty random, sometimes sevral times within a five second span
?sometimes once in 10 seconds. Thanks for the reply. I feel the 54501A
?may be able to do it, but I would certainly need some guidance. I am
?looking at page 53 of the front panel manual I lined to, but rather
?uncomprehendingly ;)
Best regards,
?Chris? ? ?mailto:chris@...
TH> Hello,
TH> sorry to ask stupid - how often does the glitch occur, as in how often
TH> in time?
TH> Tam
TH> With best regards
TH> Tam Hanna
TH> ---
TH> Enjoy electronics? Join 8300 other followers by visiting the
TH> Crazy Electronics Lab at
TH> On 11.10.2018 22:38, Chris Wilson wrote:
>>
>>? ?11/10/2018 21:36
>>
>> I have a Si5351a synthesiser chip that is supposed to give out 180
>> degree out of phase 137kHz square waves from pins CLK9 and CLK1. I
>> believe the firmware that runs it may have a bug as I see the
>> occasional drop out, very brief and seemingly random. I THINK there
>> may be a higher frequency, lower amplitude signal showing during these
>> glitches. My scopes are quite basic, a Dataman 526 150 MHz USB scope
>> and a Philips PM3380 100 MHz "combiscope" that can be switched from
>> analogue to digital. My knowledge of their usage is pretty rudimentary
>> I am afraid, although I know the basics.
>>
>>
>> I also have an elderly HP scope a HP 54501A 100MHz 4 channel jobbie.
>>
>> I suspect the old HP *MAY* be able to do this, but even with studying
>> the manual I am still unsure and if it *CAN* do this I would need
>> precise instructions as to how to set it up please!
>>
>>
>>
>>
>>
>>
>>
>> I have never attempted to catch a *dropped* waveform, could anyone
>> suggest if any of these scopes are capable of showing what happens
>> during these glitches please? Thanks.
>>
TH>
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Are you sure the internal mainframe psu can cope wth two potentially power hungry SA's?
This may preclude the worry of IF's...
Regards
Sent from Samsung by banging a nail into a piece of wood.
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Show quoted text
-------- Original message --------
From: "Dr. David Kirkby from Kirkby Microwave Ltd"
Date:12/10/2018 19:27 (GMT+00:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
On Fri, 12 Oct 2018, 18:38 bownes, < bownes@...> wrote:
You have to have an IF section. There are several choices.?
But the mainframe I bought from eBay has a 70902A IF unit, and I already have a couple of IF units on the 22 GHz front end. So perhaps something like
1) Remove a partially working power? sensor to free up a slot, giving me four free slots.
2) Split or switch output of local oscillator
3) Add in the 2.9 GHz RF section,??70902A IF unit, 2.9 GHz preamp and preselector. I only have one preselector, so have no idea if that could be used with both RF units or just one. I could suffer just one.?
I assume an address of a?70902A would need changing, as I would have two identical modules.?
Does that sound workable??
Dave.?
On Oct 12, 2018, at 13:34, Dr. David Kirkby from Kirkby Microwave Ltd < drkirkby@...> wrote:
On Fri, 12 Oct 2018 at 18:15, pianovt via Groups.Io <pianovt= [email protected]> wrote:
The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You would have to reconnect those cables on the back of the system.
I don't know what your application is, but keep in mind that the noise performance of the system is degraded at the low frequency end.
Vladan
I was not aware about the noise. I can't go into the application unfortnately.
The unit I bought does have an 10 Hz to 300 kHz IF section, so could add an IF module. From page 11 of the note someone posted,
it looks like this may be doable if the LO is amplified and split. I could consider a simple switch, or might just get away with a splitter, at some degraduable in performance. It would mean pulling out one of my power sensors, but
since one does not zero well, and I have a decent power meter, that is no big deal. I can live with that.
?
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Dr. David Kirkby from Kirkby Microwave Ltd
On Fri, 12 Oct 2018, 18:38 bownes, < bownes@...> wrote:
You have to have an IF section. There are several choices.?
But the mainframe I bought from eBay has a 70902A IF unit, and I already have a couple of IF units on the 22 GHz front end. So perhaps something like
1) Remove a partially working power? sensor to free up a slot, giving me four free slots. 2) Split or switch output of local oscillator 3) Add in the 2.9 GHz RF section,??70902A IF unit, 2.9 GHz preamp and preselector. I only have one preselector, so have no idea if that could be used with both RF units or just one. I could suffer just one.?
I assume an address of a?70902A would need changing, as I would have two identical modules.?
Does that sound workable??
Dave.?
On Oct 12, 2018, at 13:34, Dr. David Kirkby from Kirkby Microwave Ltd < drkirkby@...> wrote: On Fri, 12 Oct 2018 at 18:15, pianovt via Groups.Io <pianovt= [email protected]> wrote: The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You would have to reconnect those cables on the back of the system. I don't know what your application is, but keep in mind that the noise performance of the system is degraded at the low frequency end.
Vladan
I was not aware about the noise. I can't go into the application unfortnately.
The unit I bought does have an 10 Hz to 300 kHz IF section, so could add an IF module. From page 11 of the note someone posted,
it looks like this may be doable if the LO is amplified and split. I could consider a simple switch, or might just get away with a splitter, at some degraduable in performance. It would mean pulling out one of my power sensors, but since one does not zero well, and I have a decent power meter, that is no big deal. I can live with that.
?
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
You have to have an IF section. There are several choices.?
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Show quoted text
On Oct 12, 2018, at 13:34, Dr. David Kirkby from Kirkby Microwave Ltd < drkirkby@...> wrote: On Fri, 12 Oct 2018 at 18:15, pianovt via Groups.Io <pianovt= [email protected]> wrote: The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You would have to reconnect those cables on the back of the system. I don't know what your application is, but keep in mind that the noise performance of the system is degraded at the low frequency end.
Vladan
I was not aware about the noise. I can't go into the application unfortnately.
The unit I bought does have an 10 Hz to 300 kHz IF section, so could add an IF module. From page 11 of the note someone posted,
it looks like this may be doable if the LO is amplified and split. I could consider a simple switch, or might just get away with a splitter, at some degraduable in performance. It would mean pulling out one of my power sensors, but since one does not zero well, and I have a decent power meter, that is no big deal. I can live with that.
?
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Dr. David Kirkby from Kirkby Microwave Ltd
On Fri, 12 Oct 2018 at 18:15, pianovt via Groups.Io <pianovt= [email protected]> wrote: The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You would have to reconnect those cables on the back of the system. I don't know what your application is, but keep in mind that the noise performance of the system is degraded at the low frequency end.
Vladan
I was not aware about the noise. I can't go into the application unfortnately.
The unit I bought does have an 10 Hz to 300 kHz IF section, so could add an IF module. From page 11 of the note someone posted,
it looks like this may be doable if the LO is amplified and split. I could consider a simple switch, or might just get away with a splitter, at some degraduable in performance. It would mean pulling out one of my power sensors, but since one does not zero well, and I have a decent power meter, that is no big deal. I can live with that.
?
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You would have to reconnect those cables on the back of the system. I don't know what your application is, but keep in mind that the noise performance of the system is degraded at the low frequency end.
Vladan
|
Re: Can I capture a missed pulse with an old HP 54501A scope?
Hello Chris,
as I never used a HP scope, I can not say more. What I would suggest would be maybe a HP 53310 Modulation Analyzer, or a DPO.
May I ask where you are based. Maybe, you can slink by my place and we do the measurement together, or maybe you can lend a DPO from a friend.
Tam
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On 12.10.2018 16:07, Chris Wilson wrote: Hello Tam,
Friday, October 12, 2018
It is pretty random, sometimes sevral times within a five second span
sometimes once in 10 seconds. Thanks for the reply. I feel the 54501A
may be able to do it, but I would certainly need some guidance. I am
looking at page 53 of the front panel manual I lined to, but rather
uncomprehendingly ;)
Best regards,
Chris mailto:chris@...
TH> Hello,
TH> sorry to ask stupid - how often does the glitch occur, as in how often
TH> in time?
TH> Tam
TH> With best regards
TH> Tam Hanna
TH> ---
TH> Enjoy electronics? Join 8300 other followers by visiting the
TH> Crazy Electronics Lab at
TH> On 11.10.2018 22:38, Chris Wilson wrote:
11/10/2018 21:36
I have a Si5351a synthesiser chip that is supposed to give out 180
degree out of phase 137kHz square waves from pins CLK9 and CLK1. I
believe the firmware that runs it may have a bug as I see the
occasional drop out, very brief and seemingly random. I THINK there
may be a higher frequency, lower amplitude signal showing during these
glitches. My scopes are quite basic, a Dataman 526 150 MHz USB scope
and a Philips PM3380 100 MHz "combiscope" that can be switched from
analogue to digital. My knowledge of their usage is pretty rudimentary
I am afraid, although I know the basics.
I also have an elderly HP scope a HP 54501A 100MHz 4 channel jobbie.
I suspect the old HP *MAY* be able to do this, but even with studying
the manual I am still unsure and if it *CAN* do this I would need
precise instructions as to how to set it up please!
I have never attempted to catch a *dropped* waveform, could anyone
suggest if any of these scopes are capable of showing what happens
during these glitches please? Thanks.
TH>
|
Re: Can I capture a missed pulse with an old HP 54501A scope?
Hello Tam, Friday, October 12, 2018 It is pretty random, sometimes sevral times within a five second span sometimes once in 10 seconds. Thanks for the reply. I feel the 54501A may be able to do it, but I would certainly need some guidance. I am looking at page 53 of the front panel manual I lined to, but rather uncomprehendingly ;) Best regards, Chris mailto:chris@... TH> Hello, TH> sorry to ask stupid - how often does the glitch occur, as in how often TH> in time? TH> Tam TH> With best regards TH> Tam Hanna TH> --- TH> Enjoy electronics? Join 8300 other followers by visiting the TH> Crazy Electronics Lab at TH> On 11.10.2018 22:38, Chris Wilson wrote:
11/10/2018 21:36
I have a Si5351a synthesiser chip that is supposed to give out 180
degree out of phase 137kHz square waves from pins CLK9 and CLK1. I
believe the firmware that runs it may have a bug as I see the
occasional drop out, very brief and seemingly random. I THINK there
may be a higher frequency, lower amplitude signal showing during these
glitches. My scopes are quite basic, a Dataman 526 150 MHz USB scope
and a Philips PM3380 100 MHz "combiscope" that can be switched from
analogue to digital. My knowledge of their usage is pretty rudimentary
I am afraid, although I know the basics.
I also have an elderly HP scope a HP 54501A 100MHz 4 channel jobbie.
I suspect the old HP *MAY* be able to do this, but even with studying
the manual I am still unsure and if it *CAN* do this I would need
precise instructions as to how to set it up please!
I have never attempted to catch a *dropped* waveform, could anyone
suggest if any of these scopes are capable of showing what happens
during these glitches please? Thanks.
TH>
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Dr. David Kirkby from Kirkby Microwave Ltd
On Fri, 12 Oct 2018 at 14:20, bownes < bownes@...> wrote:
Thanks! That¡¯s the document I couldn¡¯t lay my hands on to refresh my memory.?
I guess the question becomes ¡®why would you want more than one RF module?¡¯
Bob
The 22 GHz one has a minimum frequency of 100 kHz, whereas the 2.9 GHz one has a minimum frequency of 10 Hz. I was interested in the range 20 kHz -100 kHz, and the 22 GHz front end can't do that.
? Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom. Registered in England and Wales as company number 08914892 Tel 01621-680100 / +44 1621-680100
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Thanks! That¡¯s the document I couldn¡¯t lay my hands on to refresh my memory.?
I guess the question becomes ¡®why would you want more than one RF module?¡¯
Bob
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On Oct 12, 2018, at 07:00, Noel VK3NH < noelmh@...> wrote: Bob, ? See ? Page 11 treats the system as a component and the multiple RF stages driven by one LO (buffered) have IF outputs that are then processed directly. ? The document is a mine of knowledge about configuration options for the serie. ? Regards Noel ? From: [email protected] [mailto:[email protected]] On Behalf Of bownes
Sent: Friday, 12 October 2018 7:10 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe? ? The answer is...It Depends... The real question I suspect you want answered is 'Can I have 2 (or more) RF front ends in the same SA in my 70000 MMS?' There is nothing keeping you from having completely separate SA's in a 70000 system, but you would need a 70900 for each one of them, and they would be treated completely separately. I'd have to go play to see if you can have more than one RF section in a single SA, but I suspect it is a 'no'. The SM{A,B,C} cables in the back are not as confusing as one might think, but keep a stash if you are re-arranging instruments. You eventually end up in a config where the last one is >?< too short. The cabling and addressing is laid out in the 70900{A/B} manual. Basically the signal path is 100MHz from the 70310->70900 (or 10MHz? from your external reference to the 70310 where it is multiplied up to 100MHz) , 300MHz from the 70900 to the RF section, video and IF loop from the RF through the various IF sections and to the 70900. Yo build a second SA, you might even need a separate 70310, but I'd have to look ! home. You are right, they are heavy and hard to get to the back of. I have several of them, the one in my upstairs lab was set up once and isn't going anywhere for a god long time. The one in the basement lab gets moved around a bit, and as such is on a desk height rolling rack mount enclosure so I can rollit to the area it's needed most and I can get to the back of it when it needs re-configuring, which isn't often. I purchased a 70001 full of power meters for a sane price a while back that were all labeled as 'faulty' because the chassis wan't hooked up to a controller so all the 'ERR' lights turned on. Anyone who needs a 70100, feel free to reach out. I keep meaning to list them on eBay, but never seem to remember. I'm looking for a 70700, 70600, 70620/621, 70431, and 70301A if anyone happens upon any of them. :) ? On Thu, Oct 11, 2018 at 3:20 PM Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> wrote: I have an HP 70000 series system consisting of the following parts
* 70004A colour display
* 70001A expansion mainframe
* 70900B local oscillator
* 70905A 22 GHz RF front end * 70903A 100 kHz to 3 MHz IF section * 70902A 10 Hz to 300 kHz IF section * 70310A precision frequency reference * 2 x 70100A power meters (one does not always zero) * 70600A 0-22 GHz preselector (not installed, but I have it)
* 70700A digitizer I just picked up a rather tatty expansion mainframe (70001A), with a few modules in it on eBay.
It has the following modules, only the first two of which I don't already have. * 70904A 100 Hz to 2.9 GHz RF front end - new to me * 70621A? 100 kHz to 2.9 GHz preamplifier - new to me
* 70310A precision frequency reference
* 70902A 10 Hz to 300 kHz IF section I really only bought this for the 70904A 100 Hz to 2.9 GHz RF front end, and to a lesser extent the 70621A preampliifer but I can sell the other parts. What I am unsure about is whether its possible to add these 3 modules
* 70904A 100 Hz to 2.9 GHz RF front end
* 70600A 0-22 GHz preselector
* 70621A? 100 kHz to 2.9 GHz preamplifier into the one display/mainframe I already have. Can one have both a 2.9 Ghz and 22 GHz spectrum analyzers in the same system?
So I have 3 slots spare, and want to add in 3 modules. Physically there's enough space, but I don't know if its possible to have both the 2.9 GHz and the 22 GHz spectrum analyzer modules in the same system. I find the 70000 series quite a confusing system. My mate Paul, G8WYI set it up for me, with all these SMB cables on the rear. It is far from obvious to me where they all go, and thoughts of adding the preselector and another RF front end feel me with horror, as I really have no idea where all the cables need to go. There are two other problems I have which do not help, but I am sure many people with 70000 series have these issues. * I can't get to the back of the 70000 easily -- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Bob, ? See ? Page 11 treats the system as a component and the multiple RF stages driven by one LO (buffered) have IF outputs that are then processed directly. ? The document is a mine of knowledge about configuration options for the serie. ? Regards Noel ?
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From: [email protected] [mailto:[email protected]] On Behalf Of bownes
Sent: Friday, 12 October 2018 7:10 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe? ? The answer is...It Depends... The real question I suspect you want answered is 'Can I have 2 (or more) RF front ends in the same SA in my 70000 MMS?' There is nothing keeping you from having completely separate SA's in a 70000 system, but you would need a 70900 for each one of them, and they would be treated completely separately. I'd have to go play to see if you can have more than one RF section in a single SA, but I suspect it is a 'no'. The SM{A,B,C} cables in the back are not as confusing as one might think, but keep a stash if you are re-arranging instruments. You eventually end up in a config where the last one is >?< too short. The cabling and addressing is laid out in the 70900{A/B} manual. Basically the signal path is 100MHz from the 70310->70900 (or 10MHz? from your external reference to the 70310 where it is multiplied up to 100MHz) , 300MHz from the 70900 to the RF section, video and IF loop from the RF through the various IF sections and to the 70900. Yo build a second SA, you might even need a separate 70310, but I'd have to look ! home. You are right, they are heavy and hard to get to the back of. I have several of them, the one in my upstairs lab was set up once and isn't going anywhere for a god long time. The one in the basement lab gets moved around a bit, and as such is on a desk height rolling rack mount enclosure so I can rollit to the area it's needed most and I can get to the back of it when it needs re-configuring, which isn't often. I purchased a 70001 full of power meters for a sane price a while back that were all labeled as 'faulty' because the chassis wan't hooked up to a controller so all the 'ERR' lights turned on. Anyone who needs a 70100, feel free to reach out. I keep meaning to list them on eBay, but never seem to remember. I'm looking for a 70700, 70600, 70620/621, 70431, and 70301A if anyone happens upon any of them. :) ? On Thu, Oct 11, 2018 at 3:20 PM Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> wrote: I have an HP 70000 series system consisting of the following parts
* 70004A colour display
* 70001A expansion mainframe
* 70900B local oscillator
* 70905A 22 GHz RF front end * 70903A 100 kHz to 3 MHz IF section * 70902A 10 Hz to 300 kHz IF section * 70310A precision frequency reference * 2 x 70100A power meters (one does not always zero) * 70600A 0-22 GHz preselector (not installed, but I have it)
* 70700A digitizer I just picked up a rather tatty expansion mainframe (70001A), with a few modules in it on eBay.
It has the following modules, only the first two of which I don't already have. * 70904A 100 Hz to 2.9 GHz RF front end - new to me * 70621A? 100 kHz to 2.9 GHz preamplifier - new to me
* 70310A precision frequency reference
* 70902A 10 Hz to 300 kHz IF section I really only bought this for the 70904A 100 Hz to 2.9 GHz RF front end, and to a lesser extent the 70621A preampliifer but I can sell the other parts. What I am unsure about is whether its possible to add these 3 modules
* 70904A 100 Hz to 2.9 GHz RF front end
* 70600A 0-22 GHz preselector
* 70621A? 100 kHz to 2.9 GHz preamplifier into the one display/mainframe I already have. Can one have both a 2.9 Ghz and 22 GHz spectrum analyzers in the same system?
So I have 3 slots spare, and want to add in 3 modules. Physically there's enough space, but I don't know if its possible to have both the 2.9 GHz and the 22 GHz spectrum analyzer modules in the same system. I find the 70000 series quite a confusing system. My mate Paul, G8WYI set it up for me, with all these SMB cables on the rear. It is far from obvious to me where they all go, and thoughts of adding the preselector and another RF front end feel me with horror, as I really have no idea where all the cables need to go. There are two other problems I have which do not help, but I am sure many people with 70000 series have these issues. * I can't get to the back of the 70000 easily -- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
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Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Once again it depends but generally you can have ONE spectrum analyzer per 70900, Since you have multiple chassis id suggest setting up the desired modules in each chassis and use the display module on each chassis as required.
You could even connect all 3 chassis together by adding an additional 37 pin connector cable from j2 on the second chassis to j1 on the third and j2 on chassis 3 to j1 on chassis 1 as the MSIB is circular.
Content by Scott
Typos by Siri
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Re: Can I capture a missed pulse with an old HP 54501A scope?
Hello,
sorry to ask stupid - how often does the glitch occur, as in how often
in time?
Tam
With best regards
Tam Hanna
---
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On 11.10.2018 22:38, Chris Wilson wrote:
11/10/2018 21:36
I have a Si5351a synthesiser chip that is supposed to give out 180
degree out of phase 137kHz square waves from pins CLK9 and CLK1. I
believe the firmware that runs it may have a bug as I see the
occasional drop out, very brief and seemingly random. I THINK there
may be a higher frequency, lower amplitude signal showing during these
glitches. My scopes are quite basic, a Dataman 526 150 MHz USB scope
and a Philips PM3380 100 MHz "combiscope" that can be switched from
analogue to digital. My knowledge of their usage is pretty rudimentary
I am afraid, although I know the basics.
I also have an elderly HP scope a HP 54501A 100MHz 4 channel jobbie.
I suspect the old HP *MAY* be able to do this, but even with studying
the manual I am still unsure and if it *CAN* do this I would need
precise instructions as to how to set it up please!
I have never attempted to catch a *dropped* waveform, could anyone
suggest if any of these scopes are capable of showing what happens
during these glitches please? Thanks.
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Re: Is it reasonable (or normal) to charge extra to calibrate an essential accessory supplied with an instrument?
It probably stems from the old days when to calibrate an instrument,
you made a measurement, perhaps an adjustment, and put a check on a list
to show that it was within specs.
To give the uncertainties, you had to write down the numbers and calculate
the uncertainties. A little more work, a little more money.
With modern equipment, it is probably just a press of a button either way.
-Chuck Harris
Dr. David Kirkby from Kirkby Microwave Ltd wrote:
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On Thu, 11 Oct 2018, 21:04 Mark Goldberg, <marklgoldberg@...> wrote:
It has always surprised me a little how much more is charged for a
calibration where they provide you with uncertainties and data. I expect in
most cases they do the same work and measure the same data with the same
equipment. They just charge you more to provide that data to you.
It seems to vary a lot by instrument type. For a 3457A multimeter, the
extra was minimal. Based on the US prices, getting uncertainties for the
4285A precision LCR meter costs a lot more. I don't need great accuracy for
this LCR meter, but I am keen to know if it has any problems. If it does, I
will seek a refund.
Dave
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Re: HP 141T sn:1850A 16959, hp: 8556A sn: 1907A 04190 and hp 8552B sn:1841B sn:1841A15130
One of my biggest best dumpster finds was a 13¡± South Bend lathe. :)
But the 4 chan 1GHz HP scope wasn¡¯t bad either.
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On Oct 11, 2018, at 17:32, Daniel Sheen <danielsheen5@...> wrote:
Actually, I've gotten some very nice things from dumpsters, a 5340A, an 8656B...
University labs with money for new toys are great:p
?On 10/11/18, 12:13 PM, "Craig Sawyers" <[email protected] on behalf of c.sawyers@...> wrote:
Just saved the 141T from the dumpster,
That is quite a dumpster find! Wish I had such luck....
Craig
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Re: Is it reasonable (or normal) to charge extra to calibrate an essential accessory supplied with an instrument?
Dr. David Kirkby from Kirkby Microwave Ltd
It has always surprised me a little how much more is charged for a calibration where they provide you with uncertainties and data. I expect in most cases they do the same work and measure the same data with the same equipment. They just charge you more to provide that data to you.
It seems to vary a lot by instrument type. For a 3457A multimeter, the extra was minimal. Based on the US prices, getting uncertainties for the 4285A precision LCR meter costs a lot more. I don't need great accuracy for this LCR meter, but I am keen to know if it has any problems. If it does, I will seek a refund.?
Dave
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Re: HP 141T sn:1850A 16959, hp: 8556A sn: 1907A 04190 and hp 8552B sn:1841B sn:1841A15130
Actually, I've gotten some very nice things from dumpsters, a 5340A, an 8656B... University labs with money for new toys are great:p ?On 10/11/18, 12:13 PM, "Craig Sawyers" < [email protected] on behalf of c.sawyers@...> wrote: > > Just saved the 141T from the dumpster, That is quite a dumpster find! Wish I had such luck.... Craig
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Noel VK3NH
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