Discriminator output

The Discriminator output from a scanner is the raw, unfiltered signal that a scanner produces before it is sent to the audio stage for output through the speaker -- also called the "baseband audio." This discriminator source is required for all of the applications featured by this page. Most scanners must have a simple modification made to them to output the discriminator audio output to the interfaces outlined on this page.

• See here for a list of discriminator output locations for many popular scanners - courtesy of Bill Cheek
• See this document from Greg Knox regarding instructions on how to tap the discriminator output on the BC-895 Scanner. See this picture for the location of the discriminator output on the 895.
• See Bill Cheeks SCANDATA.FAQ listed at the bottom of the page for detailed instructions on how to tap the discriminator in your scanner.