25 Mar
2019
25 Mar
'19
3:50 p.m.
Michael,
1) I will try to make some measurement about minimum SNR, for each
modulation, and add that to the documentation.
2) Yes, the modulation is set once for the Master and therefore is
imposed to all NPR-clients. If the client is not configured with the
right modulation parameter, it cannot talk to the Master. With the radio
modules that I use, based on SI4463, you cannot change this setting "on
the fly".
73,
Guillaume F4HDK
Le 25/03/2019 à 02:27, Michael Fox - N6MEF a écrit :
Guillaume:
A few questions is I may:
Answer 2 : In order to achieve links with
omnidirectional antennas, you
have to lower the datarate drastically. In order to do so, I would need
to change lots and lots of things in my protocol, which is not designed
for such low datarates. Therefore, I will not make such a development,
sorry.
Why does the choice of antenna pattern affect the data rate?
Also, have you performed any testing to understand data rate vs. SINAD or
SNR? If so, can you show what SINAD or SNR is needed to achieve each of the
modulations (13, 14, 22, 23, 24)?
It appears that the modulation (13, 14, 22, 23, 24) is set statically in the
master and applies to all remotes. Is this correct, or will the master
dynamically change modulation for each client, depending on SNR?
Thanks much,
Michael, N6MEF