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Today's Topics:
1. LFTX output power. (Jeff Scaparra)
2. Re: LFTX output power. (Marcus D. Leech)
3. Re: LFTX output power. (Jeff Scaparra)
4. Re: LFTX output power. (Marcus D. Leech)
5. Re: LFTX output power. (Jeff Scaparra)
6. Re: LFTX output power. ([email protected])
7. Re: LFTX output power. (Rafael Diniz)
8. Re: LFTX output power. (Ralph A. Schmid, dk5ras)
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Message: 1
Date: Tue, 21 May 2013 13:59:38 -0400
From: Jeff Scaparra <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [USRP-users] LFTX output power.
Message-ID:
<CALWgEa3WK=EZAM5bRasHqdGeLnnW4O6adA4uLLThD82W=m-...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
I can not seem to find this measurement on the website. I am wanting to get
a amplifer for the USRP but it requires 0.1 watts of drive to produce 5
watts. Will the USRP LFTX be able to drive this amp?
Jeff
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Message: 2
Date: Tue, 21 May 2013 14:04:06 -0400
From: "Marcus D. Leech" <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] LFTX output power.
Message-ID: <[email protected]>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
> I can not seem to find this measurement on the website. I am wanting
> to get a amplifer for the USRP but it requires 0.1 watts of drive to
> produce 5 watts. Will the USRP LFTX be able to drive this amp?
>
> Jeff
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
No. Maximum ouptut from the LFTX is roughly +5dBm, since it's just
giving you the raw output of the ADC (well, with a little bit of
balance-to-unbalanced
driver conversion).
You might investigate the mini-circuits product line
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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Message: 3
Date: Tue, 21 May 2013 14:37:34 -0400
From: Jeff Scaparra <[email protected]>
To: "Marcus D. Leech" <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] LFTX output power.
Message-ID:
<CALWgEa3scP4KRqPD8wA2kC2idNCbQBV=Uu=1vlobytuks05...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Wells thats a bummer. Is anyone using this set up to transmit? Any
recommendations for amplification?
Jeff
On Tue, May 21, 2013 at 2:04 PM, Marcus D. Leech <[email protected]> wrote:
> **
>
> I can not seem to find this measurement on the website. I am wanting to
> get a amplifer for the USRP but it requires 0.1 watts of drive to produce 5
> watts. Will the USRP LFTX be able to drive this amp?
>
> Jeff
>
>
> _______________________________________________
> USRP-users mailing
> [email protected]http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
> No. Maximum ouptut from the LFTX is roughly +5dBm, since it's just
> giving you the raw output of the ADC (well, with a little bit of
> balance-to-unbalanced
> driver conversion).
>
> You might investigate the mini-circuits product line
>
>
>
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
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Message: 4
Date: Tue, 21 May 2013 14:41:12 -0400
From: "Marcus D. Leech" <[email protected]>
To: Jeff Scaparra <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] LFTX output power.
Message-ID: <[email protected]>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
> Wells thats a bummer. Is anyone using this set up to transmit? Any
> recommendations for amplification?
>
> Jeff
>
Like I said, investigate what mini-circuits can offer you.
And if you're going to start transmitting non-trivial power on the HF
bands, you had better be licensed to do so, or unhappy people from the
government will show up at your doorstep.
>
> On Tue, May 21, 2013 at 2:04 PM, Marcus D. Leech <[email protected]
> <mailto:[email protected]>> wrote:
>
> __
>> I can not seem to find this measurement on the website. I am
>> wanting to get a amplifer for the USRP but it requires 0.1 watts
>> of drive to produce 5 watts. Will the USRP LFTX be able to drive
>> this amp?
>>
>> Jeff
>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> [email protected] <mailto:[email protected]>
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
> No. Maximum ouptut from the LFTX is roughly +5dBm, since it's
> just giving you the raw output of the ADC (well, with a little bit
> of balance-to-unbalanced
> driver conversion).
>
> You might investigate the mini-circuits product line
>
>
>
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected] <mailto:[email protected]>
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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Message: 5
Date: Tue, 21 May 2013 14:51:11 -0400
From: Jeff Scaparra <[email protected]>
To: "Marcus D. Leech" <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] LFTX output power.
Message-ID:
<calwgea2p-gp_b6gjpfuuaxgqpr1uvi7jev67cokuyaxrq+x...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Marcus,
I am a ham (N6SDR) and want to use this for ham radio communications should
have said that.
Jeff
On Tue, May 21, 2013 at 2:41 PM, Marcus D. Leech <[email protected]> wrote:
> **
>
> Wells thats a bummer. Is anyone using this set up to transmit? Any
> recommendations for amplification?
>
> Jeff
>
> Like I said, investigate what mini-circuits can offer you.
>
> And if you're going to start transmitting non-trivial power on the HF
> bands, you had better be licensed to do so, or unhappy people from the
> government will show up at your doorstep.
>
>
>
>
> On Tue, May 21, 2013 at 2:04 PM, Marcus D. Leech <[email protected]>wrote:
>
>> **
>>
>> I can not seem to find this measurement on the website. I am wanting to
>> get a amplifer for the USRP but it requires 0.1 watts of drive to produce 5
>> watts. Will the USRP LFTX be able to drive this amp?
>>
>> Jeff
>>
>>
>> _______________________________________________
>> USRP-users mailing
>> [email protected]http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>> No. Maximum ouptut from the LFTX is roughly +5dBm, since it's just
>> giving you the raw output of the ADC (well, with a little bit of
>> balance-to-unbalanced
>> driver conversion).
>>
>> You might investigate the mini-circuits product line
>>
>>
>>
>> --
>> Marcus Leech
>> Principal Investigator
>> Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org
>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> [email protected]
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>
>
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org
>
>
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Message: 6
Date: Tue, 21 May 2013 15:29:31 -0400
From: [email protected]
To: Jeff Scaparra <[email protected]>
Cc: [email protected]
Subject: Re: [USRP-users] LFTX output power.
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
On 21 May 2013 14:51, Jeff Scaparra wrote:
> Marcus,
>
> I am a
ham (N6SDR) and want to use this for ham radio communications should
have said that.
>
> Jeff
Minicircuits does have some pre-packaged
modules that would get you close to the +20dBm you need to drive your
PA.
And if you don't mind building your own stuff, there are plenty of
small PA options from which to choose from the likes of DigiKey, Mouser,
etc.
The LF_XX and BASIC_XX family boards were primarily intended,
originally, as a way of interfacing the USRP hardware to existing IF
chains in existing radios--where signal levels are typically fairly
high.
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Message: 7
Date: Wed, 22 May 2013 01:40:05 -0300
From: Rafael Diniz <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] LFTX output power.
Message-ID: <[email protected]>
Content-Type: Text/Plain; charset="iso-8859-15"
If anyone could produce and sell USRP addons like an HF amplifier, with power
step control and so on (using pins already in Basic/LF TX?) it would be
wonderful.
Best regards,
Rafael Diniz
Em ter 21 maio 2013, ?s 16:29:31, [email protected] escreveu:
>
> On 21 May 2013 14:51, Jeff Scaparra wrote:
>
> > Marcus,
> >
> > I am a
> ham (N6SDR) and want to use this for ham radio communications should
> have said that.
> >
> > Jeff
>
> Minicircuits does have some pre-packaged
> modules that would get you close to the +20dBm you need to drive your
> PA.
>
> And if you don't mind building your own stuff, there are plenty of
> small PA options from which to choose from the likes of DigiKey, Mouser,
> etc.
>
> The LF_XX and BASIC_XX family boards were primarily intended,
> originally, as a way of interfacing the USRP hardware to existing IF
> chains in existing radios--where signal levels are typically fairly
> high.
>
>
------------------------------
Message: 8
Date: Wed, 22 May 2013 07:55:06 +0200
From: "Ralph A. Schmid, dk5ras" <[email protected]>
To: <[email protected]>
Subject: Re: [USRP-users] LFTX output power.
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
LFTX is using an OpAmp as driver, with around +-3 V maximum output via a 50
Ohm resistor...
Ralph.
From: USRP-users [mailto:[email protected]] On Behalf Of
Jeff Scaparra
Sent: Tuesday, May 21, 2013 8:00 PM
To: [email protected]
Subject: [USRP-users] LFTX output power.
I can not seem to find this measurement on the website. I am wanting to get
a amplifer for the USRP but it requires 0.1 watts of drive to produce 5
watts. Will the USRP LFTX be able to drive this amp?
Jeff
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