Hi
- What does "negative Tx power" means ?
A few suggestions:
- move to GNURadio >=3.8 (most of us uses GR 3.8 or 3.9 so
it's difficult to help for outdated GR 3.7)
- QT GUI Sink : Bandwith should be equal to sample rate of the
block incoming signal, i.e. samp_rate at the RRC Filter output
(the FFT Sink does not work as a real spectrum analyzer)
- Did you measure the signal power using a spectrum analyzer ?
When do so, the receiving antennna being close to the emitter
antenna, you should get the -20 to -30 dB as compared to the
emitted power (frequency close to 1GHz and 6dBi antennas (Indoor
panel), this is depending on frequency and antenna gain). If
your emitted power is +20 dBm, you should measure something in
the range 0 dBm to -20 dBm. If not, there is something wrong in
the transmission chain.
- Did you check your signal amplitude at USRP bloc input (The maximum value should be 1 Volt to get maximum RF power which also depend on USRP settings
- Did you connected the antenna to the good channel Rx/Tx ?
Sincerely, Christophe
On 12/03/2021 15:08, AKINYELE
ITAMAKINDE wrote:
Good day to all community members.Please, I need you to help correct this flow graph configuration. The Tx power radiating is too minimal. I have adjusted and also added some other blocks to boost the signal but all to no avail. The flow graph is been used for propagation channel measurement. I will like someone to take me through or send video and other link on how to solve this problem. The flow graph is attached.Thank you.Akinyele.
