Ground the USRP1

GNU Radio
1

Hi,

I recently acquired a USRP1 and are looking to improve reception of
the TVRX board (i know it’s a cable tuner and has noise “issues”).
I noticed the GND pins on the USRP1 board and are wondering if i am
supposed to ground the board through these pins?

Regards,
Johnny

2

On 12/30/2009 03:34 AM, Johnny Vestergaard wrote:

Hi,

I recently acquired a USRP1 and are looking to improve reception of
the TVRX board (i know it’s a cable tuner and has noise “issues”).
I noticed the GND pins on the USRP1 board and are wondering if i am
supposed to ground the board through these pins?

No, those will not change anything.

Matt

3

hia,

On Wed, Dec 30, 2009 at 2:19 PM, Matt E. [email protected] wrote:

No, those will not change anything.

I’m also interested on the topic of lowering the noise fig on the TVRX,
is
that somehow possible?

/a

4

On Wed, Dec 30, 2009 at 2:58 PM, Matt E. [email protected] wrote:

The only way to lower the noise figure on the TVRX is to put an amplifier
in front of it. The noise figure is only about 8-9 dB, though, so it isn’t
that bad.

indeed, i use one of the LNA’s from rfbay, though i can listen to
cleaner
sigs with other radio equipment at hand…

/a

5

On 12/30/2009 11:50 AM, kdag wrote:

    the TVRX board (i know it's a cable tuner and has noise "issues").

is that somehow possible?
The only way to lower the noise figure on the TVRX is to put an
amplifier in front of it. The noise figure is only about 8-9 dB,
though, so it isn’t that bad.

Matt

6

Hi,
I intend to build a 2x2mimo ofdm link.I am using one usrp on each host
computer. And each usrp has two Flex 2400. Im employing spatial
multiplexing.it would be a full duplex link. If you could please tell me
how should i got about the business??
Will the subdev( ) methodology work here? If not then what strategy
should i adopt??
Thanks in advance, looking forward to your reply.

Regards,
Nadia

7

On 30/12/2009, at 20.19, Matt E. [email protected] wrote:

On 12/30/2009 03:34 AM, Johnny Vestergaard wrote:

Hi,

I recently acquired a USRP1 and are looking to improve reception of
the TVRX board (i know it’s a cable tuner and has noise “issues”).
I noticed the GND pins on the USRP1 board and are wondering if i am
supposed to ground the board through these pins?

No, those will not change anything.

Ok, thank for the information.

Regards,
Johnny