Discriminator output
From The RadioReference Wiki
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 applications such as Trunker, T4Win, and UniTrunker. Most scanners must have a simple modification made to them to feed the discriminator output to Data Slicers, or in the case of UniTrunker, a soundcard.
Note that for providing a signal for ACARS decoding, a connection from an earphone or speaker output is all that's required. This is because ACARS runs at a much lower speed, and the discriminator is not involved in AM reception.
External Links
These pages or links contain more information on discriminator taps for many brands and models of scanners, including older models
- Radio Shack Scanners
- PRO-97 tap instructions
- IdaScan.com Discriminator Tap Mod page
- Another page with discriminator tap information can be found here
- Uniden Scanners
- BC-245 discriminator tap point
- BC-895 tap instructions
- BC-780 discriminator tap points
- BCD-396T tap instructions
- NOTE: You must be a member of the BCD396T Yahoo Group to view this message
- Discriminator Tap directions
- Image of circuit board for discriminator tap