[USRP-users] not getting phase coherence between channels

2019-04-01 Thread Koyel Das (Vehere) via USRP-users
Hi, I am using the given code for data receiving from two channels. I need to do LO sharing for phase coherent application, which is done as shown in the code and externally as shown in the image attached but I am not getting constant phase difference. We have connected one antenna to input

Re: [USRP-users] TX Calibration Interpolation

2019-04-01 Thread Marcus D. Leech via USRP-users
On 04/01/2019 04:34 PM, Dave NotTelling via USRP-users wrote: Assume that I run IQ calibration for frequencies 100 MHz and 102 MHz, but then transmit on 101 MHz. Does the radio do any interpolation to figure out the most likely calibration information to apply for 101 MHz, or do I get no calib

[USRP-users] Daughtercard Serial Number to Hardware Version

2019-04-01 Thread Dave NotTelling via USRP-users
Is there a way to get the hardware revision of a daughtercard (specifically the UBX-40) from the serial number? Perhaps the serial numbers for HW Rev A ended with serial number kind of thing? The API to retrieve the hardware revision doesn't tend to work with most N210 w/ UBX-40 setups that

[USRP-users] TX Calibration Interpolation

2019-04-01 Thread Dave NotTelling via USRP-users
Assume that I run IQ calibration for frequencies 100 MHz and 102 MHz, but then transmit on 101 MHz. Does the radio do any interpolation to figure out the most likely calibration information to apply for 101 MHz, or do I get no calibration at all? Also, does the same answer apply to DC offset cali

[USRP-users] Timed commands on FP0 causing late messages in receive

2019-04-01 Thread Michael R. Freedman via USRP-users
Hello, On one USRP I have a thread that does this :     multiUsrp_->set_command_time( startTime, usrpIndex_ );     value = multiUsrp_->get_gpio_attr( "FP0", "READBACK", usrpIndex_ );     multiUsrp_->clear_command_time( usrpIndex_ ); while in another thread I do :  streamCmd.time_spec  = uh