| 261 |   |  | 
          
          
            | 262 |   | [[CollapsibleStart(The command line parameters of lte-softmodem)]]  | 
          
          
            | 263 |   | {{{ | 
          
          
            | 264 |   | 1. -O file: eNB configuration file (this is the preferred way to pass basic parameters and there are several examples in $OPENAIR_TARGETS/PROJECTS/GENERIC-LTE_EPC/CONF/ | 
          
          
            | 265 |   | }}} | 
          
          
            | 266 |   | [[CollapsibleEnd]] | 
          
          
            |   | 261 | 1. -d: enables xforms signal tracer | 
          
          
            |   | 262 | 1. -U: start as UE (default: eNB) | 
          
          
            |   | 263 | 1. -C freq: set carrier frequency to f0 for all chains (extension to independent frequencies trivial) | 
          
          
            |   | 264 | 1. -V: enables the VCD debugging tool (this is a temporal event tracer, which is useful for real-time debugging using GTKWave) | 
          
          
            |   | 265 | 1. -K file: ITTI logfile. ITTI is an intertask tracing utility which helps debugging with an EPC. It can traces all exchanges between RRC<->S1AP, RRC<->PDCP, PDCP<->S1 | 
          
          
            |   | 266 | 1. -S: do not exit for the missing slots, instead increment the counter. | 
          
          
            |   | 267 | 1. --debug-ue-prach: only send prach but do not connect | 
          
          
            |   | 268 | 1. --no-L2-connect: only runs rx, does not send prach |