The General table in the PRACH carrier node enables you to turn the PRACH carrier on and off, select a saved channel configuration, and set the length of the generated waveform.
The Baseband parameters for the PRACH carrier are described in Baseband (Basic LTE FDD PRACH).
Double-click or use the drop-down menu to turn the carrier Off or On.
Select a channel configuration with the desired bandwidth
and number of resource blocks (RB) from the 
drop-down
menu.
The setting is not selectable until certain parameters are changed, then is automatically set by the software.
Choice: 1 subframe (1ms) | 1 frame (10 ms) | 2 frames (20ms) | 3 frames (30ms) | 4 frames (40 ms) | 8 frames (80 ms) | 10 frames (100ms) | 11 frames (110ms) | 20 frames (200ms)
Default: 1 frame (10 ms)
Double-click or use the drop down menu to select a waveform generation length. Total Sample Points is based on the selected Waveform Generation Length and Oversampling Ratio as shown below:
Total Sample Points = Base Sampling Rate (MHz) × Oversampling Ratio × 1000 × Waveform Generation Length (ms).
Figure 1 shows PRACH Preamble structure.
Figure 1. PRACH Preamble structure
