Tony Hagen
2018-06-27 05:59:37 UTC
Reply to message 1:
You can make a USB CABLE arrangement for external power supply to hackRF.
You need to disconnect the power line from the USB Connector which can be
fed to an external 5V
73
Tony
-----Original Message-----
From: hackrf-dev-***@greatscottgadgets.com
Sent: Wednesday, June 27, 2018 10:58 AM
To: hackrf-***@greatscottgadgets.com
Subject: HackRF-dev Digest, Vol 70, Issue 14
Send HackRF-dev mailing list submissions to
hackrf-***@greatscottgadgets.com
To subscribe or unsubscribe via the World Wide Web, visit
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
or, via email, send a message with subject or body 'help' to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of HackRF-dev digest..."
Today's Topics:
1. Re: HackRF-dev Digest, Vol 70, Issue 13 (william hatch)
2. Re: Still hoping for PTT (Dominic Spill)
3. Re: Still hoping for PTT (Gavin Jacobs)
4. Re: Still hoping for PTT (Chuck McManis)
5. Re: Still hoping for PTT (Dominic Spill)
----------------------------------------------------------------------
Message: 1
Date: Tue, 26 Jun 2018 13:53:03 +0000 (UTC)
From: william hatch <***@yahoo.com>
To: <hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] HackRF-dev Digest, Vol 70, Issue 13
Message-ID: <***@mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"
Android phone/HackRF USB port experience
I have used the SDRTouch and RF analyzer to interface with the RTLSDR ($12
analog TV tuner) and the HackRF. Both of these draw power heavily from the
phone. For the SG3 and SG5 I replaced the stock batteries with heavy duty
after market units available from Amazon. The SG3 had to be rooted to obtain
permission to access the USB port. The SG5 may not have required rooting ...
I forget & do not have current access to an SG35. I was able to access these
radios with both of the above apps on an ASUS Zphone with the micro USB2
interface, no rooting needed .. but the battery is not removable, thus no
heavy duty battery replacement is possible for this phone.?
SDRTouch also works with the SdrPlay radio.
I tried to use a newer ASUS Zphone with the micro USB3 interface. This did
not work immediately but I did not spend any more time with it.
In summary, If you want to use an SDR with an Android phone for anything
more extensive than a ?quick look? an SG3 or SG5 with the heavy duty
replacement battery will work well for you.
cell 240-702-5336
On Tuesday, June 26, 2018, 1:28:29 AM EDT,
<hackrf-dev-***@greatscottgadgets.com> wrote:
Send HackRF-dev mailing list submissions to
??? hackrf-***@greatscottgadgets.com
To subscribe or unsubscribe via the World Wide Web, visit
??? https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
or, via email, send a message with subject or body 'help' to
??? hackrf-dev-***@greatscottgadgets.com
You can reach the person managing the list at
??? hackrf-dev-***@greatscottgadgets.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of HackRF-dev digest..."
Today's Topics:
? 1. Re: HackRF-dev Digest, Vol 70, Issue 9 (Giuseppe Marullo)
----------------------------------------------------------------------
Message: 1
Date: Mon, 25 Jun 2018 14:31:01 +0200
From: Giuseppe Marullo <***@marullo.it>
To: hackrf-***@greatscottgadgets.com
Subject: Re: [Hackrf-dev] HackRF-dev Digest, Vol 70, Issue 9
Message-ID: <7f342460-018e-7223-7988-***@marullo.it>
Content-Type: text/plain; charset=utf-8; format=flowed
Ok,
seems to work on the S7. I was fearing no demodulation(just an
analyzer?) but it works, tested on a couple of repeaters and FM radio.
hate to mess with USB connector, probably the most unfriendly connector
for DIYers ever.
In any case I am thinking to add a vanilla SDR stick to get full
duplex/double reception, and maybe easier reception with RPI for stuff
like DAB and ADS-B(not clear to me how difficult is to receive them with
a HackRf).
Thanks!
Giuseppe Marullo
IW2JWW - JN45RQ
------------------------------
Subject: Digest Footer
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
------------------------------
End of HackRF-dev Digest, Vol 70, Issue 13
******************************************
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Message: 2
Date: Tue, 26 Jun 2018 10:58:53 -0600
From: Dominic Spill <***@gmail.com>
To: Gavin Jacobs <***@hotmail.com>
Cc: "hackrf-***@greatscottgadgets.com"
<hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<CACX+tOafXBCRSjs__ES8_jbDKoMiZCNF=***@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
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
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------------------------------
Message: 3
Date: Tue, 26 Jun 2018 18:18:37 +0000
From: Gavin Jacobs <***@hotmail.com>
To: Dominic Spill <***@gmail.com>
Cc: "hackrf-***@greatscottgadgets.com"
<hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<***@MWHPR2201MB1392.namprd22.prod.outlook.com>
Content-Type: text/plain; charset="utf-8"
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
<***@gmail.com<mailto:***@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
<***@hotmail.com<mailto:***@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
<***@gmail.com<mailto:***@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
<***@hotmail.com<mailto:***@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
<***@tpg.com.au<mailto:***@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
<***@dadelus-engineering.com<mailto:***@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-***@greatscottgadgets.com] On Behalf
Of Gavin Jacobs
Sent: Saturday, June 09, 2018 5:57 PM
To:
hackrf-***@greatscottgadgets.com<mailto:hackrf-***@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-***@greatscottgadgets.com<mailto:HackRF-***@greatscottgadgets.com>
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com<mailto:HackRF-***@greatscottgadgets.com>
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com<mailto:HackRF-***@greatscottgadgets.com>
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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Message: 4
Date: Tue, 26 Jun 2018 15:51:56 -0700
From: Chuck McManis <***@gmail.com>
To: ***@hotmail.com
Cc: Dominic Spill <***@gmail.com>, Hackrf-dev
<hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<CAHTjPiqBNB7o-***@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
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.
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Message: 5
Date: Tue, 26 Jun 2018 17:40:51 -0600
From: Dominic Spill <***@gmail.com>
To: Chuck McManis <***@gmail.com>
Cc: Hackrf-dev <hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<CACX+tOag1fp=***@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
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
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Subject: Digest Footer
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
------------------------------
End of HackRF-dev Digest, Vol 70, Issue 14
******************************************
You can make a USB CABLE arrangement for external power supply to hackRF.
You need to disconnect the power line from the USB Connector which can be
fed to an external 5V
73
Tony
-----Original Message-----
From: hackrf-dev-***@greatscottgadgets.com
Sent: Wednesday, June 27, 2018 10:58 AM
To: hackrf-***@greatscottgadgets.com
Subject: HackRF-dev Digest, Vol 70, Issue 14
Send HackRF-dev mailing list submissions to
hackrf-***@greatscottgadgets.com
To subscribe or unsubscribe via the World Wide Web, visit
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
or, via email, send a message with subject or body 'help' to
hackrf-dev-***@greatscottgadgets.com
You can reach the person managing the list at
hackrf-dev-***@greatscottgadgets.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of HackRF-dev digest..."
Today's Topics:
1. Re: HackRF-dev Digest, Vol 70, Issue 13 (william hatch)
2. Re: Still hoping for PTT (Dominic Spill)
3. Re: Still hoping for PTT (Gavin Jacobs)
4. Re: Still hoping for PTT (Chuck McManis)
5. Re: Still hoping for PTT (Dominic Spill)
----------------------------------------------------------------------
Message: 1
Date: Tue, 26 Jun 2018 13:53:03 +0000 (UTC)
From: william hatch <***@yahoo.com>
To: <hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] HackRF-dev Digest, Vol 70, Issue 13
Message-ID: <***@mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"
Android phone/HackRF USB port experience
I have used the SDRTouch and RF analyzer to interface with the RTLSDR ($12
analog TV tuner) and the HackRF. Both of these draw power heavily from the
phone. For the SG3 and SG5 I replaced the stock batteries with heavy duty
after market units available from Amazon. The SG3 had to be rooted to obtain
permission to access the USB port. The SG5 may not have required rooting ...
I forget & do not have current access to an SG35. I was able to access these
radios with both of the above apps on an ASUS Zphone with the micro USB2
interface, no rooting needed .. but the battery is not removable, thus no
heavy duty battery replacement is possible for this phone.?
SDRTouch also works with the SdrPlay radio.
I tried to use a newer ASUS Zphone with the micro USB3 interface. This did
not work immediately but I did not spend any more time with it.
In summary, If you want to use an SDR with an Android phone for anything
more extensive than a ?quick look? an SG3 or SG5 with the heavy duty
replacement battery will work well for you.
cell 240-702-5336
On Tuesday, June 26, 2018, 1:28:29 AM EDT,
<hackrf-dev-***@greatscottgadgets.com> wrote:
Send HackRF-dev mailing list submissions to
??? hackrf-***@greatscottgadgets.com
To subscribe or unsubscribe via the World Wide Web, visit
??? https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
or, via email, send a message with subject or body 'help' to
??? hackrf-dev-***@greatscottgadgets.com
You can reach the person managing the list at
??? hackrf-dev-***@greatscottgadgets.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of HackRF-dev digest..."
Today's Topics:
? 1. Re: HackRF-dev Digest, Vol 70, Issue 9 (Giuseppe Marullo)
----------------------------------------------------------------------
Message: 1
Date: Mon, 25 Jun 2018 14:31:01 +0200
From: Giuseppe Marullo <***@marullo.it>
To: hackrf-***@greatscottgadgets.com
Subject: Re: [Hackrf-dev] HackRF-dev Digest, Vol 70, Issue 9
Message-ID: <7f342460-018e-7223-7988-***@marullo.it>
Content-Type: text/plain; charset=utf-8; format=flowed
Ok,
There is an android app called rf analyzer that will control a hackrf.
William, tanks for the suggestion. I just purchased the RfAnalyzer, itseems to work on the S7. I was fearing no demodulation(just an
analyzer?) but it works, tested on a couple of repeaters and FM radio.
I have used this app on an sg3 with >the after market heavy duty battery.
What did you use to inject power? Is there anything readily available? Ihate to mess with USB connector, probably the most unfriendly connector
for DIYers ever.
The SdrTouch app might also work.
SdrTouch afaik does not support the hackrf.In any case I am thinking to add a vanilla SDR stick to get full
duplex/double reception, and maybe easier reception with RPI for stuff
like DAB and ADS-B(not clear to me how difficult is to receive them with
a HackRf).
Thanks!
Giuseppe Marullo
IW2JWW - JN45RQ
------------------------------
Subject: Digest Footer
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
------------------------------
End of HackRF-dev Digest, Vol 70, Issue 13
******************************************
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------------------------------
Message: 2
Date: Tue, 26 Jun 2018 10:58:53 -0600
From: Dominic Spill <***@gmail.com>
To: Gavin Jacobs <***@hotmail.com>
Cc: "hackrf-***@greatscottgadgets.com"
<hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<CACX+tOafXBCRSjs__ES8_jbDKoMiZCNF=***@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
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
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
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)
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
-------------- next part --------------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
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)
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
I admit I have not tried this but what about using the TX LED to drive an
optocoupler to switch the amp?
Bernie
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
*Sent:* Saturday, June 09, 2018 5:57 PM
*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
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________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
I admit I have not tried this but what about using the TX LED to drive an
optocoupler to switch the amp?
Bernie
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
*Sent:* Saturday, June 09, 2018 5:57 PM
*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
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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Message: 3
Date: Tue, 26 Jun 2018 18:18:37 +0000
From: Gavin Jacobs <***@hotmail.com>
To: Dominic Spill <***@gmail.com>
Cc: "hackrf-***@greatscottgadgets.com"
<hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<***@MWHPR2201MB1392.namprd22.prod.outlook.com>
Content-Type: text/plain; charset="utf-8"
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
<***@gmail.com<mailto:***@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
<***@hotmail.com<mailto:***@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
<***@gmail.com<mailto:***@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
<***@hotmail.com<mailto:***@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
<***@tpg.com.au<mailto:***@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
<***@dadelus-engineering.com<mailto:***@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-***@greatscottgadgets.com] On Behalf
Of Gavin Jacobs
Sent: Saturday, June 09, 2018 5:57 PM
To:
hackrf-***@greatscottgadgets.com<mailto:hackrf-***@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-***@greatscottgadgets.com<mailto:HackRF-***@greatscottgadgets.com>
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com<mailto:HackRF-***@greatscottgadgets.com>
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com<mailto:HackRF-***@greatscottgadgets.com>
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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------------------------------
Message: 4
Date: Tue, 26 Jun 2018 15:51:56 -0700
From: Chuck McManis <***@gmail.com>
To: ***@hotmail.com
Cc: Dominic Spill <***@gmail.com>, Hackrf-dev
<hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<CAHTjPiqBNB7o-***@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
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.
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
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
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
-------------- next part --------------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
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
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
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)
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________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
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)
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
I admit I have not tried this but what about using the TX LED to drive
an optocoupler to switch the amp?
Bernie
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
*Sent:* Saturday, June 09, 2018 5:57 PM
*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
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________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
I admit I have not tried this but what about using the TX LED to drive
an optocoupler to switch the amp?
Bernie
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
*Sent:* Saturday, June 09, 2018 5:57 PM
*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
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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------------------------------
Message: 5
Date: Tue, 26 Jun 2018 17:40:51 -0600
From: Dominic Spill <***@gmail.com>
To: Chuck McManis <***@gmail.com>
Cc: Hackrf-dev <hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Still hoping for PTT
Message-ID:
<CACX+tOag1fp=***@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
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
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.
-------------- next part --------------it was transmitting then it would "just work" as they say.
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
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
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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
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
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
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)
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________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
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)
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
I admit I have not tried this but what about using the TX LED to drive
an optocoupler to switch the amp?
Bernie
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
*Sent:* Saturday, June 09, 2018 5:57 PM
*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
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________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
I admit I have not tried this but what about using the TX LED to drive
an optocoupler to switch the amp?
Bernie
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
*Sent:* Saturday, June 09, 2018 5:57 PM
*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
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
_______________________________________________
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
HackRF-dev mailing list
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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------------------------------
Subject: Digest Footer
_______________________________________________
HackRF-dev mailing list
HackRF-***@greatscottgadgets.com
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------------------------------
End of HackRF-dev Digest, Vol 70, Issue 14
******************************************