Re: Missing button cover on HP network analyzer.
Dr. David Kirkby from Kirkby Microwave Ltd
Your could try asking on /g/Test-Equipment-For-Sale-Wanted-or-Exchange/ to see if anyone has one to see - you might even get it free! I suspect that the same button iis used on various bits of test equipment. It looks llike the same as used on the 8753, 8720_ 4291B.
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I have an HP853A Spectrum Analyzer display with the 8559A plugin. The display and plugin controls seem to work but it is not displaying a signal regardless of the setting. I tried an external signal as well the cal input. Can anyone offer any trouble shooting tips short of trying another plugin?
Thanks,
Mike N2MS
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Re: [OT] - Bird 4391M Data connector information
Yes, Bird made 2 conversion boxes for th 4391 power analysts,? a 4380-488 and a 4380-232.? They were about the same size as the 4391 and sat under the 4391, attached with a short cable.? one box did the conversion to ieee-488, the other to rs-232.
Links to the manuals are here:
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Re: [OT] - Bird 4391M Data connector information
Ok, Bird engineer courteously answered, M is the military version and the connector's function is meant to connect with either IEEE-488 or RS232 boxes.
So, it is not a serial port, needs (some) massaging to get proper data.
Giuseppe Marullo
IW2JWW - JN45RQ
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On 10/6/2018 5:00 PM, Giuseppe Marullo wrote: Hello,
sorry for the OT. I have purchased a old rf watt meter (still sold by
Bird AFAIK) but any pointer leads me to 4391A models, M is simply
unknown. The M version has a connector on its back panel, it should be
a serial connection (somewhat DA-15 ITT Cannon, the item is not in my
hands yet) but really I am at loss to find anything about it.
I asked Bird directly but there is nothing on their site about this
version/option.
Any help is appreciated, thanks in advance.
Giuseppe Marullo
IW2JWW - JN45RQ
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Re: HP8560A power supply repair
I had the same issue on an HP 8562A. Replaced mine with an electrolytic I had lying around and haven't had issues since.
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On 2018-10-13 3:06 AM, Dieter Teuchert wrote: Today i fixed a problem in the 28 V line of our HP 8560A. The culprit was a dry elko in the voltage doubler, marked with polarity, 180 uF, 40 V. An interesting part, since it has three pins. Apparently the third pins connects the aluminum cup to Gnd to be a shield. What is the name of this part?
Forty years ago i learned that this capacitor in a voltage doubler needs to be of bipolar type in order to last, so i put in a 100uF 50 bipolar that i had and a 100 nF foil parallel. Also added a shield (copper foil).
My first repair of that machine went well, roughly four hours. I used the service manual and discharged the tube as recommended before taking out the power supply board.
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HP8560A power supply repair
Today i fixed a problem in the 28 V line of our HP 8560A. The culprit was a dry elko in the voltage doubler, marked with polarity, 180 uF, 40 V. An interesting part, since it has three pins. Apparently the third pins connects the aluminum cup to Gnd to be a shield. What is the name of this part?
Forty years ago i learned that this capacitor in a voltage doubler needs to be of bipolar type in order to last, so i put in a 100uF 50 bipolar that i had and a 100 nF foil parallel. Also added a shield (copper foil).
My first repair of that machine went well, roughly four hours. I used the service manual and discharged the tube as recommended before taking out the power supply board.
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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?
You don¡¯t loop the IF out back into RF ¨C you could use IF out on the second section when in zero span mode to an SDR like a down convertor. ? That way you get real time display of something up higher in the band than the SDR would normally go. ?
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From: [email protected] [mailto:[email protected]] On Behalf Of bownes
Sent: Saturday, 13 October 2018 10:28 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?? You can chain multiple IFs. I have two in one of my SAs and the 70900 is smart enough to select the appropriate one. There are inputs and outputs for the 21.something IF signal.? But I don¡¯t think you can loop the IF through the RF section, it only has LO in and IF out.
On Oct 12, 2018, at 19:08, Noel VK3NH <noelmh@...> wrote:
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 ? ? ? 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
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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?
You would still need to swap the LO between chassis. Much easier to just
swap the RF sections each time in one chassis.
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-----Original Message----- From: [email protected][mailto: [email protected]] On Behalf Of Scott McGrath Sent: Friday, 12 October 2018 8:57 PM 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? 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 set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
You can chain multiple IFs. I have two in one of my SAs and the 70900 is smart enough to select the appropriate one. There are inputs and outputs for the 21.something IF signal.?
But I don¡¯t think you can loop the IF through the RF section, it only has LO in and IF out.
Bob
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On Oct 12, 2018, at 19:08, Noel VK3NH < noelmh@...> wrote: 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 ? ? ? 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?
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>
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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?
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.
toggle quoted message
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.?
toggle quoted message
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
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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?
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
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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>
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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>
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Noel VK3NH
bownes