Land Mobile Radio Analyzer and Coverage Measurement Guide : P25 Analyzer (Option 521) : P25 Bit Capture
 
P25 Bit Capture
Note 
This measurement is captured on an external USB flash drive. The captured data file cannot be recalled and displayed on the instrument screen. There is a five second delay from initiating the bit capture (Log Data On) until the instrument starts logging data, then the instrument logs data in five second bursts with five second gaps between bursts. The data bursts are concatenated into a single log file.
The LMR Master can provide and log raw bits (pre Forward Error Correction) when the Rx Pattern is set to Voice.
1. From the Frequency main menu, set the receiver frequency (Rx Freq).
2. From the Setup main menu, choose Voice as the Rx Pattern.
3. From the Measurement main menu press the P25 Bit Capture submenu key twice.
4. To log data, insert a formatted USB flash drive in the LMR Master and set Log Data to On. The bit capture information will be written to a data stamped folder inside the /usr folder on the root level of the USB flash drive. The tab delimited text file contains the header and table information shown in Figure: P25 Bit Capture Display. The files are named:
BIT_CAP_LOGyearmonthdaytime.p25
P25 Bit Capture Display