7 Jun
2013
7 Jun
'13
11 a.m.
I have a project to monitoring ( air sniffer ) the data between GSM BTS and
MS using UmTRX.
Uplink Transmission is delayed 3 slots than downlink from specification.
So when I sync. with BTS and get the downlink slot data, I must switch the
freqs of receiver from downlink to uplink in less than 2 slots.
When the program call 'usrp_dev->set_rx_freq(wFreq)', How much time does the
UmTRX switch to the 'wFreq' ?
It's not specified. It'll be variable and will most likely be more in
the order of milliseconds than microseconds.
A much better plan would be to use the two channels of the UmTRX and
tune one to Downlink and one to Uplink.
Cheers,
Sylvain