Frequency ranges for basic tx/rx d'boards

Hey all,

I’m slightly confused. I’m trying to find an antenna to use with the
basic TX/RX boards to transmit and receive over the air. What frequency
ranges do the basic TX/RX boards do? After checking the wiki, it just
says “baseband.” Doing some research, I think it means a band of
frequencies starting at 0 to the highest frequency. Up until now I’ve
just been using coax, so it hasn’t really been relevant. So what’s the
highest so I can determine what antennas to purchase.

Thanks!
George

On 8/23/07, George N. [email protected] wrote:

Hey all,

I’m slightly confused. I’m trying to find an antenna to use with the
basic TX/RX boards to transmit and receive over the air. What frequency
ranges do the basic TX/RX boards do? After checking the wiki, it just
says “baseband.” Doing some research, I think it means a band of
frequencies starting at 0 to the highest frequency. Up until now I’ve
just been using coax, so it hasn’t really been relevant. So what’s the
highest so I can determine what antennas to purchase.

Apparently when I put that page together I never noticed the description
here:
http://www.ettus.com/downloads/miscdboards_v3b.pdf

Which states the Basic series of cards are 1MHz - 250MHz (not baseband
due to the transformer coupling).

I’ve updated the wiki pages to state the correct frequency range and
description.

Brian

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Note that Matt has claimed in the past (and I’ve partially verified)
that the Basic boards can go as low as about 100kHz.

  • -Dan

Brian P. wrote:


Discuss-gnuradio mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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On 8/23/07, Dan H. [email protected] wrote:

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Note that Matt has claimed in the past (and I’ve partially verified)
that the Basic boards can go as low as about 100kHz.

  • -Dan

Noted (both mentally and on the wiki pages). Thanks!

Brian

thanks for the responses!

I’m looking at this antenna:
http://www.pasternack.com/product-Mobile-Antenna-Field-Tunable-¬-wave-118--940-MHZ-PE51001-77521.html

but what does Field Tunable mean?

  • George

On Thu, Aug 23, 2007 at 12:03:25PM -0400, George N. wrote:

Thanks!
George

George, I don’t think you really want to be using basic tx/rx to do on
the air transmission. They really weren’t designed for that, unless
connected to some kind of external filters and/or amps.

Eric

George N. wrote:

but what does Field Tunable mean?

It means you cut the element to the right length to resonate at the
center frequency you want :slight_smile:


Johnathan C.
Corgan Enterprises LLC
http://corganenterprises.com

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