USRP B210 TX light blinks when I run the srsenb, USRP B210 cannot broadcast a stable signal

[utkudogdu]

Issue Description

When I run the srsenb, RF frontend device USRP B210's TX red light blinks, and therefore it cannot broadcast a realible, stable signal. I cannot see any reamrkable signal in spectrum.

Setup Details

PC: Lenovo ThinkPad intel Core i7 CPU @ 2.60 GHz x 12
OS: Ubuntu 20.04.6 LTS
RF Device: USRP B210
UHD driver: 4.7.0.0

Expected Behavior

I expect a continuous TX light in TX port of the USRP B210, which ensures that it broadcasts reliably.

Actual Behaviour

TX light in TX port blinks, therefore a stable broadcast cannot be achieved.

Steps to reproduce the problem

I am running the epc and enb on the same machine. I am using default configuration files for enb.

Additional Information

I have tested my device's transmission capability with the Ettus documentation. I am sure that it broadcasts, so no issues with the device. According to some research, TX port's light blinks when it cannot achieve a transmission in the requested high sampling rate, and when it drops samples. Maybe that could be the reason. Is there any way in the files or project that I can modify the transmssion sampling rate? Or what could be the reason?

[utkudogdu]

Okay, the issue is fixed. The problem was with the number of PRBs. Due to USRP B210 limitations, maximum of 15 PRBs (3 MHz channel bandwidth) is allowed. B210 started to have a stable TX light, and broadcast properly after I modified that setting in the enb.conf file.