Re: [USRP-users] Fwd: Phase coherency for low RX frequencies

2019-07-30 Thread Marcus D. Leech via USRP-users
On 07/30/2019 12:43 PM, Sammy Welschen via USRP-users wrote: Sorry for not specifying, but I was talking about two N310 or N320 devices. Do you know how it is in that case? With the N320, with the sample-clocks in-phase when using an external reference, I *THINK* you should see very little phase

Re: [USRP-users] Fwd: Phase coherency for low RX frequencies

2019-07-30 Thread Sammy Welschen via USRP-users
Sorry for not specifying, but I was talking about two N310 or N320 devices. Do you know how it is in that case? Am Fr., 19. Juli 2019 um 16:58 Uhr schrieb Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com>: > On 07/19/2019 05:24 AM, Sammy Welschen via USRP-users wrote: > > Thanks for yo

Re: [USRP-users] Fwd: Phase coherency for low RX frequencies

2019-07-19 Thread Marcus D. Leech via USRP-users
On 07/19/2019 05:24 AM, Sammy Welschen via USRP-users wrote: Thanks for your reply. I am a bit confused now. Since the LO for this stage is derived from the sample clock, wouldn't I be in the same situation as if I only shared 10 MHz reference and PPS signals? Quote from https://files.ettus.c

Re: [USRP-users] Fwd: Phase coherency for low RX frequencies

2019-07-19 Thread Sammy Welschen via USRP-users
Thanks for your reply. I am a bit confused now. Since the LO for this stage is derived from the sample clock, wouldn't I be in the same situation as if I only shared 10 MHz reference and PPS signals? Quote from https://files.ettus.com/manual/page_usrp_n3xx.html: -- Reasons to

[USRP-users] Fwd: Phase coherency for low RX frequencies

2019-07-18 Thread Marcus D Leech via USRP-users
>> >> I have just been corrected by one of my colleagues at Ettus. >> >> While there is an up conversion stage for frequencies below 450Mhz, the LO >> for that stage is fixed frequency, and derived from the sample clock and >> coherent across channels. >> >> So there should be no random ph