Date   

Re: receiving 76 GHz ?

Paul G8KFW
 

Hi the problem is the IF is a bit low 

2 mt only gives you 2 mhz tuning  where as  70 Cm can give you 10 or 20 Mhz of tuning and is better for digital TV

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Steve G4HTZ via Groups.Io
Sent: 12 April 2019 15:36
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] receiving 76 GHz ?

 

KUHNE do a 76ghz transverter for €1800

 

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Checked by AVG - www.avg.com
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--
Steve G4HTZ 
JO01JN
--
Paul Bicknell G8KFW   South Coast UK


Re: receiving 76 GHz ?

Paul G8KFW
 

Hi Simon

 

I assume the starlight is not geostationary

When you are working on 76 ghz I will bring a signal generator down so we can test your set up if you want

 

Regards Paul B   club member  

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Simon Brown
Sent: 12 April 2019 15:31
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] receiving 76 GHz ?

 

Hi,

 

An AMSAT satellite will soon send data on the 76 GHz band. How on earth do you receive at such a frequency:

 

·         Down converter to somewhere in the 1 to 5 GHz range so I can use an SDR?

·         Antenna?

 

I assume that due to cable loss I would have to put the electronics very close to the antenna, probably with a small PC (Intel NUC) and talk over a network?

 

Can anyone provide a link to a page with a working 76GHz system?

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK


Re: receiving 76 GHz ?

Mark - WB8TGY Korroch
 

I forgot in my earlier post that DL2AM also makes and sells a harmonic mixer that works at 76 GHz.  I have a friend with one, and he's been very happy with it.  I'm sure the Kunhe xverter hears a lot better, but it's more expensive too.





73,
Mark  WB8TGY




From: Simon Brown <simon@...>
To: UKMicrowaves@groups.io
Sent: Friday, April 12, 2019 10:31 AM
Subject: [UKMicrowaves] receiving 76 GHz ?

Hi,
 
An AMSAT satellite will soon send data on the 76 GHz band. How on earth do you receive at such a frequency:
 
  • Down converter to somewhere in the 1 to 5 GHz range so I can use an SDR?
  • Antenna?
 
I assume that due to cable loss I would have to put the electronics very close to the antenna, probably with a small PC (Intel NUC) and talk over a network?
 
Can anyone provide a link to a page with a working 76GHz system?
 
Simon Brown, G4ELI
www.sdr-radio.com
 
 



Virus-free. www.avast.com


Re: receiving 76 GHz ?

Mark - WB8TGY Korroch
 

I have one.  It works great!

73,
Mark  WB8TGY 




From: Steve G4HTZ via Groups.Io <essexsteve@...>
To: UKMicrowaves@groups.io
Sent: Friday, April 12, 2019 10:35 AM
Subject: Re: [UKMicrowaves] receiving 76 GHz ?

Virus-free. www.avast.com


Re: receiving 76 GHz ?

Steve G4HTZ
 


receiving 76 GHz ?

Simon Brown
 

Hi,

 

An AMSAT satellite will soon send data on the 76 GHz band. How on earth do you receive at such a frequency:

 

  • Down converter to somewhere in the 1 to 5 GHz range so I can use an SDR?
  • Antenna?

 

I assume that due to cable loss I would have to put the electronics very close to the antenna, probably with a small PC (Intel NUC) and talk over a network?

 

Can anyone provide a link to a page with a working 76GHz system?

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 


Re: ADF4351 MUX Pin

Andy G4JNT
 

Yes, I realise now why I wasn't seeing anything.  
It seems the N divided output mustn't be selected when the chip invokes the annoying VCO band select / recal procedure.  Since it does this when the final register is set, if I "update all registers" as my control software does that procedure will automatically occur, hence lock fail

If Reg 2 were updated alone, then no doubt it would work.  But can't be bothered updating my control software to write to one register at a time :-(
(although, as the MUXOUT  is set using option buttons and they have a click method, a single register write need only be a couple of lines of extra VB6 code ....)



On Fri, 12 Apr 2019 at 09:17, brian.flynn via Groups.Io <brian.flynn=tiscali.co.uk@groups.io> wrote:
Hi Andy,
I have set up one of the "black" Chinese boards and controlling it with the AD evaluation software using a Cypress CY7C68013A USB interface board I can select the different MUX out signals. The R and N divider outputs are both there. The R didvider  output signal is a better defined pulse than the N one which is of much shourter duration.  I have found that the Selectable MUX out is very useful in the past for debugging these boards.  I recently destroyed the chip on one board, owing to a fit of carelesness, and had to replace it. The mux out was useful in that situation for testing..

Details of using the Cypress CY7C68013A USB interfaceare are at:

https://gm8bjf.joomla.com/articles/9-pc-control-of-analog-devices-adf4xxx-synthesiser-chips

73s
Brian GM8BJF


Re: ADF4351 MUX Pin

Brian Flynn GM8BJF
 

Hi Andy,
I have set up one of the "black" Chinese boards and controlling it with the AD evaluation software using a Cypress CY7C68013A USB interface board I can select the different MUX out signals. The R and N divider outputs are both there. The R didvider  output signal is a better defined pulse than the N one which is of much shourter duration.  I have found that the Selectable MUX out is very useful in the past for debugging these boards.  I recently destroyed the chip on one board, owing to a fit of carelesness, and had to replace it. The mux out was useful in that situation for testing..

Details of using the Cypress CY7C68013A USB interfaceare are at:

https://gm8bjf.joomla.com/articles/9-pc-control-of-analog-devices-adf4xxx-synthesiser-chips

73s
Brian GM8BJF


Re: Network Analiser choice

Dave Cawley G4IUG
 


Ok,  thanks guys.
 
I have a "lot" of RF test gear, mostly 20 years old, mostly HP and like the analyser some older and some bought new.
 
I'll look at the HP 8756A /  HP 8753 on my return as I'm off to Martlesham in a hour or so.
 
Thanks
 
Dave


Re: Network Analiser choice

Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
 

On Fri, 12 Apr 2019 at 00:17, Paul Bicknell <paul@...> wrote:

OK Dave

Just how much is a  8753 as I have never bought one

 

Dave might go to up to £2K


Well, is depends on the model, but it should be possible to get one for £2000. One might need a bit of patience. 

Bear in mind that the S-parameter test sets are quite expensive, so it might work out cheaper to get an 8735D or later with the built in test set (ie does NOT have option 011).

Dave

--
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
https://www.kirkbymicrowave.co.uk/
Tel 01621-680100 / +44 1621-680100


Re: Network Analiser choice

Paul G8KFW
 

OK Dave

Just how much is a  8753 as I have never bought one

 

Dave might go to up to £2K

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Dr. David Kirkby from Kirkby Microwave Ltd
Sent: 11 April 2019 23:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Network Analiser choice

 

 

 

On Thu, 11 Apr 2019 at 22:49, Timestep <help@...> wrote:

Hi Paul

 

Phase would be good but not essential.  Budget up to £2k+ maybe.

 

Will we have badges or something so we know who we are ?

 

Thanks

 

Dave  G4IUG

 

It’s a no-brainer really. The 8753 series is by a long way the best bet. See 

 

Dave, G8WRB 

 

 

 

 

--

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
https://www.kirkbymicrowave.co.uk/
Tel 01621-680100 / +44 1621-680100

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK


Re: Network Analiser choice

Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
 



On Thu, 11 Apr 2019 at 22:49, Timestep <help@...> wrote:
Hi Paul
 
Phase would be good but not essential.  Budget up to £2k+ maybe.
 
Will we have badges or something so we know who we are ?
 
Thanks
 
Dave  G4IUG

It’s a no-brainer really. The 8753 series is by a long way the best bet. See 

Dave, G8WRB 




--
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
https://www.kirkbymicrowave.co.uk/
Tel 01621-680100 / +44 1621-680100


Re: martlesham

Richard <richard@...>
 

Hi Neil I had a note from Doug , and her doesn't want a long drive to
collect, Its a IF plug in for a HP141 SA .

By the way I found while working in Stockholm the Viking link to the
Yorkshire dialect. If you use the escalators on the underground
stations, "nej upp"

73
Richard

On Thu, 2019-04-11 at 22:44 +0100, Neil Smith G4DBN wrote:
35.4 miles from Wakefield, unless you get any better offers. However,
as
I'm a Yellowbelly, any contraband I am carrying is likely to
confiscated
on the turnpike.

Neil G4DBN

On 11/04/2019 21:41, Richard wrote:
Is anyone going to be at Martlesham who lives within 30~40 miles of
Wakefield.
I need to get a package up to Yorkshire and it needs a native to
get it
through the Yorkshire customs posts.
thanks


Network Analiser choice

Dave Cawley G4IUG
 

Hi Paul
 
Phase would be good but not essential.  Budget up to £2k+ maybe.
 
Will we have badges or something so we know who we are ?
 
Thanks
 
Dave  G4IUG


Re: martlesham

Neil Smith G4DBN
 

35.4 miles from Wakefield, unless you get any better offers. However, as I'm a Yellowbelly, any contraband I am carrying is likely to confiscated on the turnpike.

Neil G4DBN

On 11/04/2019 21:41, Richard wrote:
Is anyone going to be at Martlesham who lives within 30~40 miles of
Wakefield.
I need to get a package up to Yorkshire and it needs a native to get it
through the Yorkshire customs posts.
thanks


Re: ADF4351 MUX Pin

Andy G4JNT
 

I also found this on page 18 of the data sheet, which is significant."  The on-chip multiplexer is controlled by Bits[DB28:DB26] (see Figure 26). Note that N counter output must be disabled for VCO band selection to operate correctly.  "

Since I reprogramme all registers after changing anything using my test control software, this means a VCO band selection routine is triggered which, according to that statement, means a fail.

The resistor in series with the LED on that pin is 180 ohms and voltage on a small white led typically 2.7V, so that 500uA limit is being considerably exceeded.



On Thu, 11 Apr 2019 at 22:24, David VK3HZ <david@...> wrote:
According to the datasheet, the MUXOUT pin is only specced to source or sink up to 500uA. It shouldn't be used to drive a LED directly  


Re: ADF4351 MUX Pin

David VK3HZ
 

According to the datasheet, the MUXOUT pin is only specced to source or sink up to 500uA. It shouldn't be used to drive a LED directly  


martlesham

Richard <richard@...>
 

Is anyone going to be at Martlesham who lives within 30~40 miles of
Wakefield.
I need to get a package up to Yorkshire and it needs a native to get it
through the Yorkshire customs posts.
thanks
--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

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QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
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OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
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5.7GHz wide band test at Martelsham

mike G6TRM
 

I know it's rather short notice, Is there any chance someone could possibly bring their 5.7GHz WB transceiver( audio only, on the video channel) with them to Martelsham RT on Sunday, to conduct a quick test, to confirm mine is working correctly? There is no one near me to test with (as far as I know) and this might be the easiest way to check it out,
I will check beforehand to see if it is ok to transmit on site and if this is a problem then is simply will not happen

TIA

Mike G6TRM


Re: Filtering out QO100 spots on KST?

Ferdinand DC8EC
 

Hello Rainer,
thanks for the special tip.

Another source for a general separation of QO-100 messages is Pascal's famous DX cluster, http://www.f5len.org/cluster/index.php?what=qo100
73 de Ferdinand DC8EC

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