Date   

Re: Es Hail

Noel G8GTZ
 

Not surprised as it is Friday (read Sunday) in Qatar, which reinforces the idea that it was uplinked from Doha. 

And it probably wasn’t on S band but a ku input cross patched on to the NB transponder output.  This may also affect any observations about transponder noise floor as a 14 GHz ku input is almost certainly a lot wider than the NB 10 GHz input. 


Regards
Noel


On 18 Jan 2019, at 11:40, Barry Chambers <b.chambers@...> wrote:

Tony

Many thanks

73

Barry, G8AGN
On 18/01/2019 11:29, Anthony Horsfall wrote:
No, not seen it so far today.  Good yesterday, NB transponder was 20dB above LNB noise floor with a 1.5m dish.  CW was on but drifting, transmitting; "WELCOME de ES2HAIL", assuming this was a genuine transmission as there was a comment on the BATC website in regard to pirate cw(?)  What, already!

Good luck with it

73 Tony G4CBW  

On 18/01/2019 11:12:01, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN






Virus-free. www.avast.com


Re: Es Hail

Jules G0NZO
 

From what I can piece together from the info/rumour that has been released over the years, and reading between the lines....

As Mathius said, the EsHail2 amateur transponders are simple bent pipe.

Part of the reason for the LEILA and beacons coming from the ground is that, the actual transponder design was done by commercial manufacturers, not by the amateur community. So that would be a huge expense to contract for that extra design/integration.
And given it's geo position, it's far more feasable to do on the ground.

The other reason for the use of a pseudo beacon, is that we don't have access (or need to see) the spacecraft telemetry. Whether the operators make any paramaters specific to the AR payload, available to the AMSAT people, for inclusion in the pseudo beacon, will come out in the wash. But at the moment, the plan is, to position some band edge marker beacons on the NB transponder and have a DVBS2 video beacon on the WB transponder, showing some promo material. But I expect that this could be flexible, if the transponder becomes busy.

I'm hoping to have my uplink dish/feed in place in the next few days. So see you all on there when we get the nod.


Re: Octagon LNBs again

DD1US
 

Hi Richard,

pin 20 is the input where you want to connect your external reference source to.

Regards

Matthias

www.dd1us.de


-----Ursprüngliche Nachricht-----
Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von Richard
Gesendet: Freitag, 18. Januar 2019 11:20
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Octagon LNBs again

Hi, if its any help
pin 20 is marked as XTAL1 and pin 19 as XTAL2.

I don't know if there is any convention on which number is applied to input and out of the gate.
Ideally the input is preferred , IMO injecting on the gate output will allow any noise appearing on the gate input to reduce the PLL performance.

Richard g8jvm

On Fri, 2019-01-18 at 06:35 +0000, Gordon REASON wrote:
The crystal oscillator , is using a logic gate , with the crystal
between input to output , and with twoo 33 pF to ground at each end
.... it may be that with a 26 Mhz , one of both of the capacitors ,
requires increasing in value or decreasing ......
On my pll , I use a 27 Mhz tcxo , with a 100R and 100pF to the PLL IC
..
The Tcxo has a 3v3 output , more than enough to drive the IC .....
using my oscilloscope , the crystal osc, measured 350mV on the PLL
pins , , with the tcxo it rose to 650 mv .








On 10 December 2018 at 21:37 Richard <richard@g8jvm.com> wrote:


Hi
I found this on the OE7forum
Info !!!
Zusätzliches info für bastler die selber PLL LNB umbauen wollen.
Nicht
alle PLL LNBs arbeiten mit Quarzen die eine niedrigere Frequenz
haben.... besonders nicht IC Type:
RDA3565ES
wie unten in Bild in diesen Schaltung zu sehen ist.
Warscheindlich ist LO bei diesen IC eher für höhere frequenzen
geeignet in gegensatz zum IC Type RDA3560M der problemloss mit 26MHz
arbeitet.
Additional info for hobbyists who themselves want PLL LNB rebuild.
Not
all PLL LNBs work with the crystals with lower frequency ....
especially not IC Type: RDA3565ES is as shown below in Fig... ( in
this circuit ) Perhaps LO is more suitable for higher frequencies,
in opposed with this IC Type RDA3560M the smoothly work with 26MHz.

Has anyone else found this , my LNB has a RDA3565es fitted both
sides This is a note from someone who has been changing the xtals
from 27 MHz to 26 MHz There is also a data sheet for the RDA5365M on
the same site Talking to G4HIZ at the weekend the later versions
with the 25 MHz ref do not pull as well, so it looks like there are
3 variants of the dual lnb.
Obviously I'd prefer to find one with RDA3565M PLLs fitted as I now
have a 26 MHz OCXO, so like to find some ancient stock, this is
getting a PITA !

--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

##################################################################
####

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave Maidenhead QRA:
IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W QRV 6mtrs 200W, 4mtrs
150W, 2mtrs 300W, 70cms 200W, Microwave 1296MHz 140W, 2320MHz 100W
& 10368MHz 5W
OS: Linux Mint 19 x86_64 Tara, on a Dell Inspiron N5030 laptop
##################################################################
####






Re: Octagon LNBs again

DD1US
 

Hi,

 

I have been using a voltage divider 1k2 series and 470 ohm to ground and then coupled the reference signal from the middle via a 2,2 nF capacitor to the PLL IC.

 

 

As you can also see I used the 6V regulator in the Octagon and adjusted this to 5V using a 220Ohm series resistor and 15 nF blocking capacitor.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von Andy G4JNT
Gesendet: Freitag, 18. Januar 2019 11:25
An: UK Microwaves groups.io <UKMicrowaves@groups.io>
Betreff: Re: [UKMicrowaves] Octagon LNBs again

 

And you're also fighting the low impedance of the logic gate output if you try to drive that one.

 

Andy

 

 

 

On Fri, 18 Jan 2019 at 10:20, Richard <richard@...> wrote:

Hi, if its any help
pin 20 is marked as XTAL1 and pin 19 as XTAL2.

I don't know if there is any convention on which number is applied to
input and out of the gate.
Ideally  the input is preferred , IMO injecting on the gate output will
allow  any noise appearing on the gate input to reduce the PLL
performance.

Richard g8jvm




On Fri, 2019-01-18 at 06:35 +0000, Gordon REASON wrote:
> The crystal oscillator , is using a logic gate , with the crystal
> between input to output , and with twoo 33 pF to ground at each end
> .... it may be that with a 26 Mhz , one of both of the capacitors ,
> requires increasing in value or decreasing ......
> On my pll , I use a 27 Mhz tcxo , with a 100R and 100pF to the PLL IC
> ..
> The Tcxo has a 3v3 output , more than enough to drive the  IC .....
> using my oscilloscope , the crystal osc, measured 350mV on the PLL
> pins , , with the tcxo it rose to 650 mv .
>
>
>
>
>
>
>
>
> > On 10 December 2018 at 21:37 Richard <richard@...> wrote:
> >
> >
> > Hi
> > I found this on the OE7forum
> > Info !!!
> > Zusätzliches info für bastler die selber PLL LNB umbauen wollen.
> > Nicht
> > alle PLL LNBs arbeiten mit Quarzen die
> > eine niedrigere Frequenz haben.... besonders nicht IC Type:
> > RDA3565ES
> > wie unten in Bild in diesen Schaltung zu sehen ist.
> > Warscheindlich ist LO bei diesen IC eher für höhere frequenzen
> > geeignet
> > in gegensatz zum IC Type RDA3560M der
> > problemloss mit 26MHz arbeitet.
> > Additional info for hobbyists who themselves want PLL LNB rebuild.
> > Not
> > all PLL LNBs work with the crystals with
> > lower frequency .... especially not IC Type: RDA3565ES is as shown
> > below in Fig... ( in this circuit )
> > Perhaps LO is more suitable for higher frequencies, in opposed with
> > this IC Type RDA3560M the smoothly
> > work with 26MHz.
> >
> > Has anyone else found this , my LNB has a RDA3565es fitted both
> > sides
> > This is a note from someone who has been changing the xtals from 27
> > MHz
> > to 26 MHz
> > There is also a data sheet for the RDA5365M on the same site
> > Talking to G4HIZ at the weekend the later versions with the 25 MHz
> > ref
> > do not pull as well, so it looks like there are 3 variants of the
> > dual
> > lnb.
> > Obviously I'd prefer to find one with RDA3565M PLLs fitted as I now
> > have a 26 MHz OCXO, so like to find some ancient stock, this is
> > getting
> > a PITA !
> >
> > --
> >  Best wishes /73
> >  Richard Bown
> >
> >  Email : richard@...
> >
> >  HTTP  :  http://www.g8jvm.com
> >
> >  ##################################################################
> > ####
> >
> >  Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
> >  Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
> >  QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
> >  Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
> >  OS: Linux Mint 19 x86_64 Tara, on a Dell Inspiron N5030 laptop
> >  ##################################################################
> > ####
> >
> >
> >
> >
> >
>
>
>




Re: Es Hail

Anthony Horsfall
 

This is the site the ATV folk have been using for engineering beacons:

http://frequencyplansatellites.altervista.org/Beacon-Telemetry_Europe-Africa-MiddleEast.html

73 Tony G4CBW

On 18/01/2019 12:11:20, DD1US <matthias.bopp@...> wrote:

Hi Sam,

 

I am not sure about the broadcast satellites. The must be some beacon / telemetry which is generated on the satellite to get some housekeeping data to the operators.

 

Best regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von SAM JEWELL via Groups.Io
Gesendet: Freitag, 18. Januar 2019 13:02
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Es Hail

 

Thanks Matthias,

It seemed that must be the case, but I wasn’t sure I had seen it written anywhere.

Do you know if the broadcast satellites also do it this way?

 

73 de Sam




Sent from Yahoo Mail for iPad

On Friday, January 18, 2019, 11:59 am, DD1US <matthias.bopp@...> wrote:

Hi Sam,

 

yes, both the Leila signal and the beacon signals will be uplinked from the control stations.

 

The transponders on EsHail-2 are basically bent-pipe-transponders.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von SAM JEWELL via Groups.Io
Gesendet: Freitag, 18. Januar 2019 12:45
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Es Hail

 

Having just spoken with John, G4BAO, we concluded that looking for the very distinct transponder noise floor was the best current way to check your system when there is no reliable way of knowing when there is a signal being transponded. Looking at the transponder noise floor, over the receiver system noise floor, looks like a fairly good way to compare receiver dish and LNB performance. I don’t know what others are doing. i am just visually averaging the noise on the SDR screen. I am used to doing this from my days of making video noise measurements. It is quite reproducible, if not quantitive!

 

Unlike the Leila facility carried on AO40, it looks to me like the ground control station, whether in Qatar or DL, will uplink the  Leila signal. This was not possible with the highly eliptical orbit of AO40, but, I think, much more practical with a geostationary satellite. Maybe someone in Amsat DL can confirm this is the case? I don’t think information like this would contravene the NDA? Maybe the beacons will be uplinked as well? Is this practical?

 

Sam, G4DDK




Sent from Yahoo Mail for iPad

On Friday, January 18, 2019, 11:11 am, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN




Virus-free. www.avast.com


Re: Es Hail

DD1US
 

Hi Sam,

 

I am not sure about the broadcast satellites. The must be some beacon / telemetry which is generated on the satellite to get some housekeeping data to the operators.

 

Best regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von SAM JEWELL via Groups.Io
Gesendet: Freitag, 18. Januar 2019 13:02
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Es Hail

 

Thanks Matthias,

It seemed that must be the case, but I wasn’t sure I had seen it written anywhere.

Do you know if the broadcast satellites also do it this way?

 

73 de Sam

On Friday, January 18, 2019, 11:59 am, DD1US <matthias.bopp@...> wrote:

Hi Sam,

 

yes, both the Leila signal and the beacon signals will be uplinked from the control stations.

 

The transponders on EsHail-2 are basically bent-pipe-transponders.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von SAM JEWELL via Groups.Io
Gesendet: Freitag, 18. Januar 2019 12:45
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Es Hail

 

Having just spoken with John, G4BAO, we concluded that looking for the very distinct transponder noise floor was the best current way to check your system when there is no reliable way of knowing when there is a signal being transponded. Looking at the transponder noise floor, over the receiver system noise floor, looks like a fairly good way to compare receiver dish and LNB performance. I don’t know what others are doing. i am just visually averaging the noise on the SDR screen. I am used to doing this from my days of making video noise measurements. It is quite reproducible, if not quantitive!

 

Unlike the Leila facility carried on AO40, it looks to me like the ground control station, whether in Qatar or DL, will uplink the  Leila signal. This was not possible with the highly eliptical orbit of AO40, but, I think, much more practical with a geostationary satellite. Maybe someone in Amsat DL can confirm this is the case? I don’t think information like this would contravene the NDA? Maybe the beacons will be uplinked as well? Is this practical?

 

Sam, G4DDK




Sent from Yahoo Mail for iPad

On Friday, January 18, 2019, 11:11 am, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN




Re: Es Hail

SAM JEWELL
 

Thanks Matthias,
It seemed that must be the case, but I wasn’t sure I had seen it written anywhere.
Do you know if the broadcast satellites also do it this way?

73 de Sam

On Friday, January 18, 2019, 11:59 am, DD1US <matthias.bopp@...> wrote:

Hi Sam,

 

yes, both the Leila signal and the beacon signals will be uplinked from the control stations.

 

The transponders on EsHail-2 are basically bent-pipe-transponders.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von SAM JEWELL via Groups.Io
Gesendet: Freitag, 18. Januar 2019 12:45
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Es Hail

 

Having just spoken with John, G4BAO, we concluded that looking for the very distinct transponder noise floor was the best current way to check your system when there is no reliable way of knowing when there is a signal being transponded. Looking at the transponder noise floor, over the receiver system noise floor, looks like a fairly good way to compare receiver dish and LNB performance. I don’t know what others are doing. i am just visually averaging the noise on the SDR screen. I am used to doing this from my days of making video noise measurements. It is quite reproducible, if not quantitive!

 

Unlike the Leila facility carried on AO40, it looks to me like the ground control station, whether in Qatar or DL, will uplink the  Leila signal. This was not possible with the highly eliptical orbit of AO40, but, I think, much more practical with a geostationary satellite. Maybe someone in Amsat DL can confirm this is the case? I don’t think information like this would contravene the NDA? Maybe the beacons will be uplinked as well? Is this practical?

 

Sam, G4DDK




Sent from Yahoo Mail for iPad

On Friday, January 18, 2019, 11:11 am, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN





Re: Es Hail

DD1US
 

Hi Sam,

 

yes, both the Leila signal and the beacon signals will be uplinked from the control stations.

 

The transponders on EsHail-2 are basically bent-pipe-transponders.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

Von: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Im Auftrag von SAM JEWELL via Groups.Io
Gesendet: Freitag, 18. Januar 2019 12:45
An: UKMicrowaves@groups.io
Betreff: Re: [UKMicrowaves] Es Hail

 

Having just spoken with John, G4BAO, we concluded that looking for the very distinct transponder noise floor was the best current way to check your system when there is no reliable way of knowing when there is a signal being transponded. Looking at the transponder noise floor, over the receiver system noise floor, looks like a fairly good way to compare receiver dish and LNB performance. I don’t know what others are doing. i am just visually averaging the noise on the SDR screen. I am used to doing this from my days of making video noise measurements. It is quite reproducible, if not quantitive!

 

Unlike the Leila facility carried on AO40, it looks to me like the ground control station, whether in Qatar or DL, will uplink the  Leila signal. This was not possible with the highly eliptical orbit of AO40, but, I think, much more practical with a geostationary satellite. Maybe someone in Amsat DL can confirm this is the case? I don’t think information like this would contravene the NDA? Maybe the beacons will be uplinked as well? Is this practical?

 

Sam, G4DDK

On Friday, January 18, 2019, 11:11 am, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN





Re: Es Hail

SAM JEWELL
 

Having just spoken with John, G4BAO, we concluded that looking for the very distinct transponder noise floor was the best current way to check your system when there is no reliable way of knowing when there is a signal being transponded. Looking at the transponder noise floor, over the receiver system noise floor, looks like a fairly good way to compare receiver dish and LNB performance. I don’t know what others are doing. i am just visually averaging the noise on the SDR screen. I am used to doing this from my days of making video noise measurements. It is quite reproducible, if not quantitive!

Unlike the Leila facility carried on AO40, it looks to me like the ground control station, whether in Qatar or DL, will uplink the  Leila signal. This was not possible with the highly eliptical orbit of AO40, but, I think, much more practical with a geostationary satellite. Maybe someone in Amsat DL can confirm this is the case? I don’t think information like this would contravene the NDA? Maybe the beacons will be uplinked as well? Is this practical?

Sam, G4DDK

On Friday, January 18, 2019, 11:11 am, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN






Re: Es Hail

Barry Chambers
 

Tony

Many thanks

73

Barry, G8AGN
On 18/01/2019 11:29, Anthony Horsfall wrote:

No, not seen it so far today.  Good yesterday, NB transponder was 20dB above LNB noise floor with a 1.5m dish.  CW was on but drifting, transmitting; "WELCOME de ES2HAIL", assuming this was a genuine transmission as there was a comment on the BATC website in regard to pirate cw(?)  What, already!

Good luck with it

73 Tony G4CBW  

On 18/01/2019 11:12:01, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN






Virus-free. www.avast.com


Re: Es Hail

Anthony Horsfall
 

No, not seen it so far today.  Good yesterday, NB transponder was 20dB above LNB noise floor with a 1.5m dish.  CW was on but drifting, transmitting; "WELCOME de ES2HAIL", assuming this was a genuine transmission as there was a comment on the BATC website in regard to pirate cw(?)  What, already!

Good luck with it

73 Tony G4CBW  

On 18/01/2019 11:12:01, Barry Chambers <b.chambers@...> wrote:

Is EsHail2 transmitting today?

73

Barry, G8AGN






Virus-free. www.avast.com


Re: Es Hail

Barry Chambers
 

Is EsHail2 transmitting today?

73

Barry, G8AGN


Re: Es Hail

Martin G8BHC
 

That would be nice. Any volunteers?
73
Martin RH G8BHC





On 17 Jan 2019, at 23:09, Conrad, PA5Y <g0ruz@...> wrote:

Maybe an article is being prepared already for Scatterpoint?


--
Martin RH G8BHC


Re: Octagon LNBs again

Andy G4JNT
 

And you're also fighting the low impedance of the logic gate output if you try to drive that one.



On Fri, 18 Jan 2019 at 10:20, Richard <richard@...> wrote:
Hi, if its any help
pin 20 is marked as XTAL1 and pin 19 as XTAL2.

I don't know if there is any convention on which number is applied to
input and out of the gate.
Ideally  the input is preferred , IMO injecting on the gate output will
allow  any noise appearing on the gate input to reduce the PLL
performance.

Richard g8jvm




On Fri, 2019-01-18 at 06:35 +0000, Gordon REASON wrote:
> The crystal oscillator , is using a logic gate , with the crystal
> between input to output , and with twoo 33 pF to ground at each end
> .... it may be that with a 26 Mhz , one of both of the capacitors ,
> requires increasing in value or decreasing ......
> On my pll , I use a 27 Mhz tcxo , with a 100R and 100pF to the PLL IC
> ..
> The Tcxo has a 3v3 output , more than enough to drive the  IC .....
> using my oscilloscope , the crystal osc, measured 350mV on the PLL
> pins , , with the tcxo it rose to 650 mv .
>
>
>
>
>
>
>
>
> > On 10 December 2018 at 21:37 Richard <richard@...> wrote:
> >
> >
> > Hi
> > I found this on the OE7forum
> > Info !!!
> > Zusätzliches info für bastler die selber PLL LNB umbauen wollen.
> > Nicht
> > alle PLL LNBs arbeiten mit Quarzen die
> > eine niedrigere Frequenz haben.... besonders nicht IC Type:
> > RDA3565ES
> > wie unten in Bild in diesen Schaltung zu sehen ist.
> > Warscheindlich ist LO bei diesen IC eher für höhere frequenzen
> > geeignet
> > in gegensatz zum IC Type RDA3560M der
> > problemloss mit 26MHz arbeitet.
> > Additional info for hobbyists who themselves want PLL LNB rebuild.
> > Not
> > all PLL LNBs work with the crystals with
> > lower frequency .... especially not IC Type: RDA3565ES is as shown
> > below in Fig... ( in this circuit )
> > Perhaps LO is more suitable for higher frequencies, in opposed with
> > this IC Type RDA3560M the smoothly
> > work with 26MHz.
> >
> > Has anyone else found this , my LNB has a RDA3565es fitted both
> > sides
> > This is a note from someone who has been changing the xtals from 27
> > MHz
> > to 26 MHz
> > There is also a data sheet for the RDA5365M on the same site
> > Talking to G4HIZ at the weekend the later versions with the 25 MHz
> > ref
> > do not pull as well, so it looks like there are 3 variants of the
> > dual
> > lnb.
> > Obviously I'd prefer to find one with RDA3565M PLLs fitted as I now
> > have a 26 MHz OCXO, so like to find some ancient stock, this is
> > getting
> > a PITA !
> >
> > --
> >  Best wishes /73
> >  Richard Bown
> >
> >  Email : richard@...
> >
> >  HTTP  :  http://www.g8jvm.com
> >
> >  ##################################################################
> > ####
> >
> >  Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
> >  Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
> >  QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
> >  Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
> >  OS: Linux Mint 19 x86_64 Tara, on a Dell Inspiron N5030 laptop
> >  ##################################################################
> > ####
> >
> >
> >
> >
> >
>
>
>





Re: Octagon LNBs again

Richard <richard@...>
 

Hi, if its any help
pin 20 is marked as XTAL1 and pin 19 as XTAL2.

I don't know if there is any convention on which number is applied to
input and out of the gate.
Ideally the input is preferred , IMO injecting on the gate output will
allow any noise appearing on the gate input to reduce the PLL
performance.

Richard g8jvm

On Fri, 2019-01-18 at 06:35 +0000, Gordon REASON wrote:
The crystal oscillator , is using a logic gate , with the crystal
between input to output , and with twoo 33 pF to ground at each end
.... it may be that with a 26 Mhz , one of both of the capacitors ,
requires increasing in value or decreasing ......
On my pll , I use a 27 Mhz tcxo , with a 100R and 100pF to the PLL IC
..
The Tcxo has a 3v3 output , more than enough to drive the IC .....
using my oscilloscope , the crystal osc, measured 350mV on the PLL
pins , , with the tcxo it rose to 650 mv .








On 10 December 2018 at 21:37 Richard <richard@g8jvm.com> wrote:


Hi
I found this on the OE7forum
Info !!!
Zusätzliches info für bastler die selber PLL LNB umbauen wollen.
Nicht
alle PLL LNBs arbeiten mit Quarzen die
eine niedrigere Frequenz haben.... besonders nicht IC Type:
RDA3565ES
wie unten in Bild in diesen Schaltung zu sehen ist.
Warscheindlich ist LO bei diesen IC eher für höhere frequenzen
geeignet
in gegensatz zum IC Type RDA3560M der
problemloss mit 26MHz arbeitet.
Additional info for hobbyists who themselves want PLL LNB rebuild.
Not
all PLL LNBs work with the crystals with
lower frequency .... especially not IC Type: RDA3565ES is as shown
below in Fig... ( in this circuit )
Perhaps LO is more suitable for higher frequencies, in opposed with
this IC Type RDA3560M the smoothly
work with 26MHz.

Has anyone else found this , my LNB has a RDA3565es fitted both
sides
This is a note from someone who has been changing the xtals from 27
MHz
to 26 MHz
There is also a data sheet for the RDA5365M on the same site
Talking to G4HIZ at the weekend the later versions with the 25 MHz
ref
do not pull as well, so it looks like there are 3 variants of the
dual
lnb.
Obviously I'd prefer to find one with RDA3565M PLLs fitted as I now
have a 26 MHz OCXO, so like to find some ancient stock, this is
getting
a PITA !

--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

##################################################################
####

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19 x86_64 Tara, on a Dell Inspiron N5030 laptop
##################################################################
####






Re: Octagon LNBs again

Gordon REASON <gordonj.reason@...>
 

The crystal oscillator , is using a logic gate , with the crystal between input to output , and with twoo 33 pF to ground at each end .... it may be that with a 26 Mhz , one of both of the capacitors , requires increasing in value or decreasing ......
On my pll , I use a 27 Mhz tcxo , with a 100R and 100pF to the PLL IC ..
The Tcxo has a 3v3 output , more than enough to drive the IC ..... using my oscilloscope , the crystal osc, measured 350mV on the PLL pins , , with the tcxo it rose to 650 mv .

On 10 December 2018 at 21:37 Richard <richard@g8jvm.com> wrote:


Hi
I found this on the OE7forum
Info !!!
Zusätzliches info für bastler die selber PLL LNB umbauen wollen. Nicht
alle PLL LNBs arbeiten mit Quarzen die
eine niedrigere Frequenz haben.... besonders nicht IC Type: RDA3565ES
wie unten in Bild in diesen Schaltung zu sehen ist.
Warscheindlich ist LO bei diesen IC eher für höhere frequenzen geeignet
in gegensatz zum IC Type RDA3560M der
problemloss mit 26MHz arbeitet.
Additional info for hobbyists who themselves want PLL LNB rebuild. Not
all PLL LNBs work with the crystals with
lower frequency .... especially not IC Type: RDA3565ES is as shown
below in Fig... ( in this circuit )
Perhaps LO is more suitable for higher frequencies, in opposed with
this IC Type RDA3560M the smoothly
work with 26MHz.

Has anyone else found this , my LNB has a RDA3565es fitted both sides
This is a note from someone who has been changing the xtals from 27 MHz
to 26 MHz
There is also a data sheet for the RDA5365M on the same site
Talking to G4HIZ at the weekend the later versions with the 25 MHz ref
do not pull as well, so it looks like there are 3 variants of the dual
lnb.
Obviously I'd prefer to find one with RDA3565M PLLs fitted as I now
have a 26 MHz OCXO, so like to find some ancient stock, this is getting
a PITA !

--
Best wishes /73
Richard Bown

Email : richard@g8jvm.com

HTTP : http://www.g8jvm.com

######################################################################

Ham Call: G8JVM . QRV: 50-432 MHz + Microwave
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W,
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
OS: Linux Mint 19 x86_64 Tara, on a Dell Inspiron N5030 laptop
######################################################################





Es Hail

Conrad, PA5Y
 

OK I am getting interested in Es Hail as I have realised that I already have almost all the kit.

 

Is there a page anywhere that summaries the downlink  equipment requirements based upon a Octagon PLL LNB. I think that this is the correct device:

 

https://www.ebay.co.uk/itm/Octagon-OTLSO-PLL-Optima-0-1dB-4K-3D-HD-Twin-2-Output-High-Gain-Satellite-LNB/192108842161?

 

I will take out the Xtal and use a DF9NP LO most probably, I like them and they seem to be clean enough close in. I have a 24MHz one already for my RSP2Pro, shame that can’t be used. On the subject of the RSP2Pro, presumably this will be a good IF receiver, not sure what the latency is as I have never really tested it.

 

What are people using as a power inserter? There seems to a lot of off the shelf ones around but maybe there are some simple amateur designs that are clean and don’t use grotty wall warts.  I have a 1m offset fed dish for the downlink. As for the uplink I think that I will use a separate antenna. Looks as though there is no need to butcher the feedhorn on the LNB after all.

 

Maybe an article is being prepared already for Scatterpoint?

 

73

 

Conrad PA5Y


Re: Locking 25MHz Octagons

Mike Willis
 

Realising I can simply test it I tried - it didn't work. Interestingly 12.5 MHz did but it took a few moments. Back to 25MHz like a sensible person now.
--
Mike G0MJW


Re: Locking 25MHz Octagons

Chris G8BKE
 

I've been locking with an external 27MHz source at 0dBm but found with the crystal still in circuit it would lose lock in the evening when the crystal temperature excursion was worst. Recycling the power usually got it back in lock. I have since removed the crystal and it now stays in lock 24/7.
 
73 de Chris G8BKE
 
Website:  www.g8bke.co.uk


Re: Es H

John Fell
 

image.png

DL0SHF now using my 60cm tropo system , 27MHZ injection locked  3 year olde Octogon dual optima .You can just see the CW FSK sequence (its audible ..just) and a vague noisy bit on centre of plot where its doing the QRA64 bits .On 3.4m prime at G4RFR yesterday beacon was hitting +16dB /noise in 6HZ RBW . 
Es Hail is very loud on this 60cm compared to the Moon bounced beacon !
I have just installed a 90cm offset to tweak onto Es Hail when narrow band transponder is active again.

John
G0API

On Thu, 17 Jan 2019 at 16:28, Mike Willis <willis.mj@...> wrote:
Bother - at work so wasn't able to check. What is the difference between the levels?
--
Mike G0MJW

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