IQ trim

IQ Trim allows you to trim "radio silence" from the beginning and end of a C16 or C8 capture file.

UI Components

• Capture path - select to pick the capture file to open.
• IQ Display - shows the IQ file power in 240 buckets. Green/Red lines indicate the Start/End positions.
• Start - Starting sample of the trim region. Can be modified.
• End - Ending sample of the trim region. Can be modified.
• Samples - Number of samples int the capture file.
• Max Pwr - Power (complex magnitude) of the "strongest" samplein the capture file.
• Cutoff - Signal to Noise cutoff as a percentage of the Max Pwr. Can be modified.

Trimming Files

1. Open a capture file. You should hopefully see a trimmable region in the IQ Display control.

• If you don't see a block in the IQ Display, the capture signal was too weak for the tool.

2. Manually set Start/End or use the Cutoff % to automatically trim.
3. Press "Trim" - the file will be edited. It does not make a backup so be careful with your favorite sample files. Maybe use FileMan to make a backup first.