Re: [USRP-users] N310 why 2 front ends now
On 04/10/2018 04:27 PM, Martin Braun wrote: > On 04/10/2018 09:14 AM, Rob Kossler via USRP-users wrote: >> Hi, >> Within the last couple of weeks, the N310 tree went from having 1 front >> end to 2 front ends per daughterboard (A,B,C, or D). What is the reason >> for this? Why would the user want to choose subdev spec "A0" as opposed >> to "A1" and same for other paths? >> >> I attached the uhd_usrp_probe results from the most recent uhd version >> (2c9087d) as well as one from a couple of weeks ago (a1b5c4a) showing >> the difference in the trees. >> Rob > > Hey Rob, > > you found a bug. Let me clarify: > > The subdev spec is a bit of an artefact from the past, so we're trying > to bridge the USRP stone age with the N310 future here. For that reason, > the four possible values for your subdev spec on the N310 are: > > A:0 A:1 B:0 B:1 > > ...and they correspond to the front panel labels: > > RF0 RF1 RF2 RF3 > > The A and B signify both the physical daughterboard, as well as the > corresponding RFNoC block and RFNoC block controller (in software). > > When we first released, we had A:0 B:0 C:0 D:0 for various reasons. > However, we wanted to change it to what we have now mostly because it > helps remind people that A:0 and A:1 are on the same hardware, share an > LO, and so on. When we did change it, we made a mistake that wasn't > caught until now. > > We're working on a fix, as well as a clarification in the manual right now. Actually, I need to add some more clarifications: - When I said we moved from "A:0 B:0 C:0 D:0" to "A:0 A:1 B:0 B:1", I meant on master branch. On maint branch, the former is still correct (and will stay like that for the entirety of the 3.11 release cycle). - There still is a bug on maint that'll produce what you saw (and we have a fix for it) Cheers, Martin ___ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Re: [USRP-users] N310 why 2 front ends now
On 04/10/2018 09:14 AM, Rob Kossler via USRP-users wrote: > Hi, > Within the last couple of weeks, the N310 tree went from having 1 front > end to 2 front ends per daughterboard (A,B,C, or D). What is the reason > for this? Why would the user want to choose subdev spec "A0" as opposed > to "A1" and same for other paths? > > I attached the uhd_usrp_probe results from the most recent uhd version > (2c9087d) as well as one from a couple of weeks ago (a1b5c4a) showing > the difference in the trees. > Rob Hey Rob, you found a bug. Let me clarify: The subdev spec is a bit of an artefact from the past, so we're trying to bridge the USRP stone age with the N310 future here. For that reason, the four possible values for your subdev spec on the N310 are: A:0 A:1 B:0 B:1 ...and they correspond to the front panel labels: RF0 RF1 RF2 RF3 The A and B signify both the physical daughterboard, as well as the corresponding RFNoC block and RFNoC block controller (in software). When we first released, we had A:0 B:0 C:0 D:0 for various reasons. However, we wanted to change it to what we have now mostly because it helps remind people that A:0 and A:1 are on the same hardware, share an LO, and so on. When we did change it, we made a mistake that wasn't caught until now. We're working on a fix, as well as a clarification in the manual right now. Hope this clears things up. -- Martin ___ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
[USRP-users] N310 why 2 front ends now
Hi, Within the last couple of weeks, the N310 tree went from having 1 front end to 2 front ends per daughterboard (A,B,C, or D). What is the reason for this? Why would the user want to choose subdev spec "A0" as opposed to "A1" and same for other paths? I attached the uhd_usrp_probe results from the most recent uhd version (2c9087d) as well as one from a couple of weeks ago (a1b5c4a) showing the difference in the trees. Rob _ / | Device: N300-Series Device | _ |/ | | Mboard: ni-n3xx-3144673 | | eeprom_version: 1 | | pid: 16962 | | product: n310 | | rev: 3 | | rpc_connection: remote | | serial: 3144673 | | type: n3xx | | MPM Version: 1.2 | | FPGA Version: 5.2 | | RFNoC capable: Yes | | | | Time sources: internal, external, gpsdo | | Clock sources: external, internal, gpsdo | | Sensors: fan, gps_time, ref_locked, temp, gps_sky, gps_locked, gps_tpv | | _ | |/ | | | RX Dboard: A | | | _ | | |/ | | | | RX Frontend: 0 | | | | Name: Magnesium | | | | Antennas: TX/RX, RX2, CAL, LOCAL | | | | Sensors: lo_locked, lowband_lo_locked, ad9371_lo_locked | | | | Freq range: 1.000 to 6000.000 MHz | | | | Gain range all: 0.0 to 75.0 step 0.5 dB | | | | Gain range rfic: 0.0 to 0.0 step 0.0 dB | | | | Gain range dsa: 0.0 to 0.0 step 0.0 dB | | | | Gain range amp: 0.0 to 0.0 step 0.0 dB | | | | Bandwidth range: 2000.0 to 1.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _ | | |/ | | | | RX Codec: A | | | | Name: AD9371 Dual ADC | | | | Gain Elements: None | | _ | |/ | | | RX Dboard: B | | | _ | | |/ | | | | RX Frontend: 0 | | | | Name: Magnesium | | | | Antennas: TX/RX, RX2, CAL, LOCAL | | | | Sensors: lo_locked, lowband_lo_locked, ad9371_lo_locked | | | | Freq range: 1.000 to 6000.000 MHz | | | | Gain range all: 0.0 to 75.0 step 0.5 dB | | | | Gain range rfic: 0.0 to 0.0 step 0.0 dB | | | | Gain range dsa: 0.0 to 0.0 step 0.0 dB | | | | Gain range amp: 0.0 to 0.0 step 0.0 dB | | | | Bandwidth range: 2000.0 to 1.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _ | | |/ | | | | RX Codec: B | | | | Name: AD9371 Dual ADC | | | | Gain Elements: None | | _ | |/ | | | RX Dboard: C | | | _ | | |/ | | | | RX Frontend: 0 | | | | Name: Magnesium | | | | Antennas: TX/RX, RX2, CAL, LOCAL | | | | Sensors: lo_locked, lowband_lo_locked, ad9371_lo_locked | | | | Freq range: 1.000 to 6000.000 MHz | | | | Gain range all: 0.0 to 75.0 step 0.5 dB | | | | Gain range rfic: 0.0 to 0.0 step 0.0 dB | | | | Gain range dsa: 0.0 to 0.0 step 0.0 dB | | | | Gain range amp: 0.0 to 0.0 step 0.0 dB | | | | Bandwidth range: 2000.0 to 1.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _ | | |/ | | | | RX Codec: C | | | | Name: AD9371 Dual ADC | | | | Gain Elements: None | | _ | |/ | | | RX Dboard: D | | | _ | | |/ | | | | RX Frontend: 0 | | | | Name: Magnesium | | | | Antennas: TX/RX, RX2, CAL, LOCAL | | | | Sensors: lo_locked, lowband_lo_locked, ad9371_lo_locked | | | | Freq range: 1.000 to 6000.000 MHz | | | | Gain range all: 0.0 to 75.0 step 0.5 dB | | | | Gain range rfic: 0.0 to 0.0 step 0.0 dB | | | | Gain range dsa: 0.0 to 0.0 step 0.0 dB | | | | Gain range amp: 0.0 to 0.0 step 0.0 dB | | | | Bandwidth range: 2000.0 to 1.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _ | | |/ | | | | RX Codec: D | | | | Name: AD9371 Dual ADC | | | | Gain Elements: None | |
