Re: [Hackrf-dev] Still hoping for PTT

2018-06-27 Thread Giuseppe Marullo 
Agreed,
But assuming the hw model could be disabled by a little switch you won't need 
any software change at all and retain bias ability for rx only applications.
If using software is that easy, then there should be no problem to activate 
bias and tx function at the same time.
I guess that not all the programs able to tx are able to do it, hence the idea 
to link the two together at hw level,  but maybe I didn't get the whole picture.

Still today is not clear to me how to drive in tx the hackrf looking at 
gnuradio example diagrams, go figure if I know how to sync the bias at the same 
time. 

On June 27, 2018 9:25:36 PM GMT+02:00, Chuck McManis  
wrote:
>It is a bit more complicated Giuseppe than that. You see there are
>systems
>which have active antennas (powered) for receiving. In such a system
>you
>can use the antenna bias to provide power to the active antenna
>elements
>(typically a filter bank and an LNA). Those are typically receive only
>systems. Systems that have a dedicated transmit port can "hard code"
>the
>bias-T on that port and switch on or off bias on the receive port. But
>if
>you only have one port there are times when you want the bias on all
>the
>time (operations with an active antenna) and times when you want it
>only
>during transmit (PTT / bias-t applications). A software option that
>lets
>you choose how it behaves is the best overall solution.
>
>--Chuck
>
>On Wed, Jun 27, 2018 at 3:13 AM Giuseppe Marullo 
>wrote:
>
>> > Or to put it differently, :-) If the HackRF would enable the ANT
>bias
>> > when it was transmitting then it would "just work" as they say.
>> Definitely I would vote for this. Maybe we could "link" the TX LED
>> signal with the BIAS using a little hw "bridge" so not to rely on any
>> sw change.
>>
>> Giuseppe Marullo
>> IW2JWW - JN45RQ
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Re: [Hackrf-dev] Still hoping for PTT

2018-06-27 Thread Chuck McManis 
It is a bit more complicated Giuseppe than that. You see there are systems
which have active antennas (powered) for receiving. In such a system you
can use the antenna bias to provide power to the active antenna elements
(typically a filter bank and an LNA). Those are typically receive only
systems. Systems that have a dedicated transmit port can "hard code" the
bias-T on that port and switch on or off bias on the receive port. But if
you only have one port there are times when you want the bias on all the
time (operations with an active antenna) and times when you want it only
during transmit (PTT / bias-t applications). A software option that lets
you choose how it behaves is the best overall solution.

--Chuck

On Wed, Jun 27, 2018 at 3:13 AM Giuseppe Marullo 
wrote:

> > Or to put it differently, :-) If the HackRF would enable the ANT bias
> > when it was transmitting then it would "just work" as they say.
> Definitely I would vote for this. Maybe we could "link" the TX LED
> signal with the BIAS using a little hw "bridge" so not to rely on any
> sw change.
>
> Giuseppe Marullo
> IW2JWW - JN45RQ
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Re: [Hackrf-dev] Still hoping for PTT

2018-06-27 Thread Giuseppe Marullo 
> Or to put it differently, :-) If the HackRF would enable the ANT bias
> when it was transmitting then it would "just work" as they say.
Definitely I would vote for this. Maybe we could "link" the TX LED
signal with the BIAS using a little hw "bridge" so not to rely on any
sw change.

Giuseppe Marullo
IW2JWW - JN45RQ
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Re: [Hackrf-dev] Still hoping for PTT

2018-06-26 Thread Dominic Spill 
It's possible that we could add an option for this, but I wouldn't want to
make it the default because there are times when we don't want to turn it
off when switching back to RX mode.

Dominic

On 26 June 2018 at 16:51, Chuck McManis  wrote:

> Or to put it differently, :-) If the HackRF would enable the ANT bias when
> it was transmitting then it would "just work" as they say.
>
> On Tue, Jun 26, 2018 at 11:18 AM Gavin Jacobs 
> wrote:
>
>> Dominic
>> Thanks for that offer/suggestion, but it’s already done! I found the TX
>> mode signal that drives the TX LED, and it was already brought out to P5.
>> So All I had to do was solder some ribbon cable to P5 socket (which is not
>> populated). I have it connected to my power amp such that it energizes
>> whenever the Hackrf is in transmit mode.
>>
>> Jake
>>
>>
>> On Jun 26, 2018, at 10:59 AM, Dominic Spill  wrote:
>>
>> I'm not certain, because I don't want to break portapack or other add on
>> boards, but it may be possible for us to toggle a GPIO pin on one of the
>> headers when we switch to TX mode, if that would help?
>>
>> Dominic
>>
>> On 20 June 2018 at 17:55, Gavin Jacobs  wrote:
>>
>>> Chuck,
>>> I have used the bias-t voltage on the hackrf to power an upconverter but
>>> it isn’t easy to turn it on and off. The only method I know is to use
>>> hackrf-transfer - but that doesn’t work when switching to/from rx & tx.
>>>
>>> Meanwhile I have brought the tx LED signal out from P5, and it is
>>> switching the power amp on and off just fine.
>>>
>>> Jake
>>>
>>> On Jun 19, 2018, at 7:02 PM, Chuck McManis 
>>> wrote:
>>>
>>> FWIW the idiomatic way to achieve this as far as I can tell is to send a
>>> bias-T signal on the RF cable, basically its a DC offset on the cable which
>>> the PA picks up and switches on. This lets you have short cables between
>>> the PA and the antenna and its only one line to hook up (the antenna coax)
>>>
>>> On Tue, Jun 19, 2018 at 5:04 PM Gavin Jacobs 
>>> wrote:
>>>
 Bernie
 That’s a great idea! I looked on the hackrf schematic and the signal
 for the TX LED is brought out to a (DNP) header - all I have todo is bring
 that signal out to my PTT circuit. Thanks for the suggestion!

 Jake


 On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
 wrote:

 I admit I have not tried this but what about using the TX LED to drive
 an optocoupler to switch the amp?

 Bernie



 On 11 Jun 2018, at 00:53, CJ Hicks 
 wrote:

 Why not leave your exciter on and only PTT your power amplifier (PA)?
 Or use an RF to shunt your exciter signal into a dummy load.  Just a couple
 of random thoughts.

 CJH

 *From:* HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com
 ] *On Behalf Of *Gavin Jacobs
 *Sent:* Saturday, June 09, 2018 5:57 PM
 *To:* hackrf-dev@greatscottgadgets.com
 *Subject:* [Hackrf-dev] Still hoping for PTT

 Has there been any progress on implementing digital i/o from/to the
 hackrf One. I'm hoping that someday the hackrf can supply a PTT signal to
 an external amplifier.

 Jake

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Re: [Hackrf-dev] Still hoping for PTT

2018-06-26 Thread Chuck McManis 
Or to put it differently, :-) If the HackRF would enable the ANT bias when
it was transmitting then it would "just work" as they say.

On Tue, Jun 26, 2018 at 11:18 AM Gavin Jacobs 
wrote:

> Dominic
> Thanks for that offer/suggestion, but it’s already done! I found the TX
> mode signal that drives the TX LED, and it was already brought out to P5.
> So All I had to do was solder some ribbon cable to P5 socket (which is not
> populated). I have it connected to my power amp such that it energizes
> whenever the Hackrf is in transmit mode.
>
> Jake
>
>
> On Jun 26, 2018, at 10:59 AM, Dominic Spill  wrote:
>
> I'm not certain, because I don't want to break portapack or other add on
> boards, but it may be possible for us to toggle a GPIO pin on one of the
> headers when we switch to TX mode, if that would help?
>
> Dominic
>
> On 20 June 2018 at 17:55, Gavin Jacobs  wrote:
>
>> Chuck,
>> I have used the bias-t voltage on the hackrf to power an upconverter but
>> it isn’t easy to turn it on and off. The only method I know is to use
>> hackrf-transfer - but that doesn’t work when switching to/from rx & tx.
>>
>> Meanwhile I have brought the tx LED signal out from P5, and it is
>> switching the power amp on and off just fine.
>>
>> Jake
>>
>> On Jun 19, 2018, at 7:02 PM, Chuck McManis 
>> wrote:
>>
>> FWIW the idiomatic way to achieve this as far as I can tell is to send a
>> bias-T signal on the RF cable, basically its a DC offset on the cable which
>> the PA picks up and switches on. This lets you have short cables between
>> the PA and the antenna and its only one line to hook up (the antenna coax)
>>
>> On Tue, Jun 19, 2018 at 5:04 PM Gavin Jacobs 
>> wrote:
>>
>>> Bernie
>>> That’s a great idea! I looked on the hackrf schematic and the signal for
>>> the TX LED is brought out to a (DNP) header - all I have todo is bring that
>>> signal out to my PTT circuit. Thanks for the suggestion!
>>>
>>> Jake
>>>
>>>
>>> On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
>>> wrote:
>>>
>>> I admit I have not tried this but what about using the TX LED to drive
>>> an optocoupler to switch the amp?
>>>
>>> Bernie
>>>
>>>
>>>
>>> On 11 Jun 2018, at 00:53, CJ Hicks 
>>> wrote:
>>>
>>> Why not leave your exciter on and only PTT your power amplifier (PA)?
>>> Or use an RF to shunt your exciter signal into a dummy load.  Just a couple
>>> of random thoughts.
>>>
>>> CJH
>>>
>>> *From:* HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com
>>> ] *On Behalf Of *Gavin Jacobs
>>> *Sent:* Saturday, June 09, 2018 5:57 PM
>>> *To:* hackrf-dev@greatscottgadgets.com
>>> *Subject:* [Hackrf-dev] Still hoping for PTT
>>>
>>> Has there been any progress on implementing digital i/o from/to the
>>> hackrf One. I'm hoping that someday the hackrf can supply a PTT signal to
>>> an external amplifier.
>>>
>>> Jake
>>>
>>> ___
>>> HackRF-dev mailing list
>>> HackRF-dev@greatscottgadgets.com
>>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>>>
>>>
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>>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>>>
>>
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Re: [Hackrf-dev] Still hoping for PTT

2018-06-26 Thread Gavin Jacobs 
Dominic
Thanks for that offer/suggestion, but it’s already done! I found the TX mode 
signal that drives the TX LED, and it was already brought out to P5. So All I 
had to do was solder some ribbon cable to P5 socket (which is not populated). I 
have it connected to my power amp such that it energizes whenever the Hackrf is 
in transmit mode.

Jake


On Jun 26, 2018, at 10:59 AM, Dominic Spill 
mailto:domini...@gmail.com>> wrote:

I'm not certain, because I don't want to break portapack or other add on 
boards, but it may be possible for us to toggle a GPIO pin on one of the 
headers when we switch to TX mode, if that would help?

Dominic

On 20 June 2018 at 17:55, Gavin Jacobs 
mailto:apriljunk...@hotmail.com>> wrote:
Chuck,
I have used the bias-t voltage on the hackrf to power an upconverter but it 
isn’t easy to turn it on and off. The only method I know is to use 
hackrf-transfer - but that doesn’t work when switching to/from rx & tx.

Meanwhile I have brought the tx LED signal out from P5, and it is switching the 
power amp on and off just fine.

Jake

On Jun 19, 2018, at 7:02 PM, Chuck McManis 
mailto:chuck.mcma...@gmail.com>> wrote:

FWIW the idiomatic way to achieve this as far as I can tell is to send a bias-T 
signal on the RF cable, basically its a DC offset on the cable which the PA 
picks up and switches on. This lets you have short cables between the PA and 
the antenna and its only one line to hook up (the antenna coax)

On Tue, Jun 19, 2018 at 5:04 PM Gavin Jacobs 
mailto:apriljunk...@hotmail.com>> wrote:
Bernie
That’s a great idea! I looked on the hackrf schematic and the signal for the TX 
LED is brought out to a (DNP) header - all I have todo is bring that signal out 
to my PTT circuit. Thanks for the suggestion!

Jake


On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
mailto:bernardkob...@tpg.com.au>> wrote:

I admit I have not tried this but what about using the TX LED to drive an 
optocoupler to switch the amp?

Bernie



On 11 Jun 2018, at 00:53, CJ Hicks 
mailto:cjhi...@dadelus-engineering.com>> wrote:

Why not leave your exciter on and only PTT your power amplifier (PA)?  Or use 
an RF to shunt your exciter signal into a dummy load.  Just a couple of random 
thoughts.

CJH

From: HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com] On Behalf Of 
Gavin Jacobs
Sent: Saturday, June 09, 2018 5:57 PM
To: hackrf-dev@greatscottgadgets.com
Subject: [Hackrf-dev] Still hoping for PTT

Has there been any progress on implementing digital i/o from/to the hackrf One. 
I'm hoping that someday the hackrf can supply a PTT signal to an external 
amplifier.

Jake

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Re: [Hackrf-dev] Still hoping for PTT

2018-06-26 Thread Dominic Spill 
I'm not certain, because I don't want to break portapack or other add on
boards, but it may be possible for us to toggle a GPIO pin on one of the
headers when we switch to TX mode, if that would help?

Dominic

On 20 June 2018 at 17:55, Gavin Jacobs  wrote:

> Chuck,
> I have used the bias-t voltage on the hackrf to power an upconverter but
> it isn’t easy to turn it on and off. The only method I know is to use
> hackrf-transfer - but that doesn’t work when switching to/from rx & tx.
>
> Meanwhile I have brought the tx LED signal out from P5, and it is
> switching the power amp on and off just fine.
>
> Jake
>
> On Jun 19, 2018, at 7:02 PM, Chuck McManis 
> wrote:
>
> FWIW the idiomatic way to achieve this as far as I can tell is to send a
> bias-T signal on the RF cable, basically its a DC offset on the cable which
> the PA picks up and switches on. This lets you have short cables between
> the PA and the antenna and its only one line to hook up (the antenna coax)
>
> On Tue, Jun 19, 2018 at 5:04 PM Gavin Jacobs 
> wrote:
>
>> Bernie
>> That’s a great idea! I looked on the hackrf schematic and the signal for
>> the TX LED is brought out to a (DNP) header - all I have todo is bring that
>> signal out to my PTT circuit. Thanks for the suggestion!
>>
>> Jake
>>
>>
>> On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
>> wrote:
>>
>> I admit I have not tried this but what about using the TX LED to drive an
>> optocoupler to switch the amp?
>>
>> Bernie
>>
>>
>>
>> On 11 Jun 2018, at 00:53, CJ Hicks 
>> wrote:
>>
>> Why not leave your exciter on and only PTT your power amplifier (PA)?  Or
>> use an RF to shunt your exciter signal into a dummy load.  Just a couple of
>> random thoughts.
>>
>> CJH
>>
>> *From:* HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com
>> ] *On Behalf Of *Gavin Jacobs
>> *Sent:* Saturday, June 09, 2018 5:57 PM
>> *To:* hackrf-dev@greatscottgadgets.com
>> *Subject:* [Hackrf-dev] Still hoping for PTT
>>
>> Has there been any progress on implementing digital i/o from/to the
>> hackrf One. I'm hoping that someday the hackrf can supply a PTT signal to
>> an external amplifier.
>>
>> Jake
>>
>> ___
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>> HackRF-dev@greatscottgadgets.com
>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>>
>>
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Re: [Hackrf-dev] Still hoping for PTT

2018-06-20 Thread Gavin Jacobs 
Chuck,
I have used the bias-t voltage on the hackrf to power an upconverter but it 
isn’t easy to turn it on and off. The only method I know is to use 
hackrf-transfer - but that doesn’t work when switching to/from rx & tx.

Meanwhile I have brought the tx LED signal out from P5, and it is switching the 
power amp on and off just fine.

Jake

On Jun 19, 2018, at 7:02 PM, Chuck McManis 
mailto:chuck.mcma...@gmail.com>> wrote:

FWIW the idiomatic way to achieve this as far as I can tell is to send a bias-T 
signal on the RF cable, basically its a DC offset on the cable which the PA 
picks up and switches on. This lets you have short cables between the PA and 
the antenna and its only one line to hook up (the antenna coax)

On Tue, Jun 19, 2018 at 5:04 PM Gavin Jacobs 
mailto:apriljunk...@hotmail.com>> wrote:
Bernie
That’s a great idea! I looked on the hackrf schematic and the signal for the TX 
LED is brought out to a (DNP) header - all I have todo is bring that signal out 
to my PTT circuit. Thanks for the suggestion!

Jake


On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
mailto:bernardkob...@tpg.com.au>> wrote:

I admit I have not tried this but what about using the TX LED to drive an 
optocoupler to switch the amp?

Bernie



On 11 Jun 2018, at 00:53, CJ Hicks 
mailto:cjhi...@dadelus-engineering.com>> wrote:

Why not leave your exciter on and only PTT your power amplifier (PA)?  Or use 
an RF to shunt your exciter signal into a dummy load.  Just a couple of random 
thoughts.

CJH

From: HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com] On Behalf Of 
Gavin Jacobs
Sent: Saturday, June 09, 2018 5:57 PM
To: hackrf-dev@greatscottgadgets.com
Subject: [Hackrf-dev] Still hoping for PTT

Has there been any progress on implementing digital i/o from/to the hackrf One. 
I'm hoping that someday the hackrf can supply a PTT signal to an external 
amplifier.

Jake

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Re: [Hackrf-dev] Still hoping for PTT

2018-06-19 Thread Chuck McManis 
FWIW the idiomatic way to achieve this as far as I can tell is to send a
bias-T signal on the RF cable, basically its a DC offset on the cable which
the PA picks up and switches on. This lets you have short cables between
the PA and the antenna and its only one line to hook up (the antenna coax)

On Tue, Jun 19, 2018 at 5:04 PM Gavin Jacobs 
wrote:

> Bernie
> That’s a great idea! I looked on the hackrf schematic and the signal for
> the TX LED is brought out to a (DNP) header - all I have todo is bring that
> signal out to my PTT circuit. Thanks for the suggestion!
>
> Jake
>
>
> On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
> wrote:
>
> I admit I have not tried this but what about using the TX LED to drive an
> optocoupler to switch the amp?
>
> Bernie
>
>
>
> On 11 Jun 2018, at 00:53, CJ Hicks 
> wrote:
>
> Why not leave your exciter on and only PTT your power amplifier (PA)?  Or
> use an RF to shunt your exciter signal into a dummy load.  Just a couple of
> random thoughts.
>
> CJH
>
> *From:* HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com
> ] *On Behalf Of *Gavin Jacobs
> *Sent:* Saturday, June 09, 2018 5:57 PM
> *To:* hackrf-dev@greatscottgadgets.com
> *Subject:* [Hackrf-dev] Still hoping for PTT
>
> Has there been any progress on implementing digital i/o from/to the hackrf
> One. I'm hoping that someday the hackrf can supply a PTT signal to an
> external amplifier.
>
> Jake
>
> ___
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> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>
>
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Re: [Hackrf-dev] Still hoping for PTT

2018-06-19 Thread Gavin Jacobs 
Bernie
That’s a great idea! I looked on the hackrf schematic and the signal for the TX 
LED is brought out to a (DNP) header - all I have todo is bring that signal out 
to my PTT circuit. Thanks for the suggestion!

Jake


On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
mailto:bernardkob...@tpg.com.au>> wrote:

I admit I have not tried this but what about using the TX LED to drive an 
optocoupler to switch the amp?

Bernie



On 11 Jun 2018, at 00:53, CJ Hicks 
mailto:cjhi...@dadelus-engineering.com>> wrote:

Why not leave your exciter on and only PTT your power amplifier (PA)?  Or use 
an RF to shunt your exciter signal into a dummy load.  Just a couple of random 
thoughts.

CJH

From: HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com] On Behalf Of 
Gavin Jacobs
Sent: Saturday, June 09, 2018 5:57 PM
To: hackrf-dev@greatscottgadgets.com
Subject: [Hackrf-dev] Still hoping for PTT

Has there been any progress on implementing digital i/o from/to the hackrf One. 
I'm hoping that someday the hackrf can supply a PTT signal to an external 
amplifier.

Jake

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