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[Discuss-gnuradio] USRP LO Relocation Latency

From: Vincenzo Pellegrini
Subject: [Discuss-gnuradio] USRP LO Relocation Latency
Date: Wed, 26 Sep 2012 19:00:29 +0200

Dear gr / USRP fellows,

I'm currently experimenting with USRP B100 Local Oscillator relocation time.
I've done some experiments on the RX path by tuning towards and away from an OFDM beacon signal.

I have flushed into the received signal some recognizable "relocation marks" which allowed me to analyze theĀ 
received signal integrity in the temporal vicinity of the relocation instant.

It looks like the LO responds to the steering command in some milliseconds to about two tens of millisecs,
still "artifacts" such as unsuppressed, dominant carrier or unstable gain remain there for some hundreds of millisecs.

I saw that the wiki states "perhaps a second" as the LO settling time.
But can anybody confirm the above behaviour analysis ?

best regardsĀ 


Vincenzo Pellegrini

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