Difference between revisions of "Discriminator output"
From The RadioReference Wiki
m (Added Pro-26 discriminator info) |
m (Needs current scanners) |
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− | + | =Modifications= | |
− | + | Also see the [[Scandata faq q2]] article for a list of older scanners' tap points. This is from an original article written by the original scanner hacker and guru the late '''Bill Cheek'''. | |
− | Also see the [[Scandata faq q2]] article for a list of older scanners' tap points. This is from an original article by the late Bill Cheek. | ||
− | |||
'''Uniden''' | '''Uniden''' | ||
*[http://www.discriminator.nl/ubc245xlt/index-en.html BC-245 Discriminator Tap] | *[http://www.discriminator.nl/ubc245xlt/index-en.html BC-245 Discriminator Tap] | ||
− | * [http://home.ica.net/~phoenix/wap/BC246T/ JPEGs of BC246 discrim tap] | + | *[http://home.ica.net/~phoenix/wap/BC246T/ JPEGs of BC246 discrim tap] |
*[http://www.discriminator.nl/ubc3300xlt/index-en.html BC296D/UBC 3300XLT] | *[http://www.discriminator.nl/ubc3300xlt/index-en.html BC296D/UBC 3300XLT] | ||
*[[Installing a Discriminator Tap on a BC350A | BC350A Discriminator Tap]] | *[[Installing a Discriminator Tap on a BC350A | BC350A Discriminator Tap]] | ||
*[[Installing a Discriminator Tap on a BC350C | BC350C Discriminator Tap]] | *[[Installing a Discriminator Tap on a BC350C | BC350C Discriminator Tap]] | ||
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*[http://groups.yahoo.com/group/BCD396T/message/8405 BC-396T Discriminator Tap] | *[http://groups.yahoo.com/group/BCD396T/message/8405 BC-396T Discriminator Tap] | ||
**NOTE: You must be a member of the BCD396T Yahoo to view this message. | **NOTE: You must be a member of the BCD396T Yahoo to view this message. | ||
** The JPEG for the discriminator tap can be viewed [[media:BCD396T_Discriminator_Out.jpg|here]] | ** The JPEG for the discriminator tap can be viewed [[media:BCD396T_Discriminator_Out.jpg|here]] | ||
− | + | *[http://myweb.accessus.net/~090/bc-780xlt.html#disctap BC-780 Discriminator Tap] | |
− | * [http://myweb.accessus.net/~090/bc-780xlt.html#disctap BC-780 Discriminator Tap] | ||
*[[BC796D Discriminator Mod | BC785D Discriminator Tap]] | *[[BC796D Discriminator Mod | BC785D Discriminator Tap]] | ||
*[[BC796D Discriminator Mod | BC796D Discriminator Tap]] | *[[BC796D Discriminator Mod | BC796D Discriminator Tap]] | ||
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* [http://forums.radioreference.com/gre-scanners/85155-psr-500-discriminator.html PSR-500 Discriminator] | * [http://forums.radioreference.com/gre-scanners/85155-psr-500-discriminator.html PSR-500 Discriminator] | ||
* [[R7100 Discriminator Tap Notes]] | * [[R7100 Discriminator Tap Notes]] | ||
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+ | |||
+ | ;Scanners not needing a tap to output discriminator based info: | ||
+ | These scanner's listed below need no internal modification to allow discriminator info to be extracted. This would be though a Menu setting, that may need to be set to output data. Those setting would need to be reverted to default setting for programming and/or firmware updating. | ||
+ | * | ||
+ | |||
==Why use a resistor and/or capacitor ?== | ==Why use a resistor and/or capacitor ?== | ||
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[http://en.wikipedia.org/wiki/Low-pass_filter#Passive_electronic_realization Wikipedia Page showing Circuit and calculations for Discriminator Tap]. | [http://en.wikipedia.org/wiki/Low-pass_filter#Passive_electronic_realization Wikipedia Page showing Circuit and calculations for Discriminator Tap]. | ||
− | + | ||
+ | |||
+ | ;Related Pages: | ||
These pages or links contain more information on discriminator taps for many brands and models of scanners, including older models | These pages or links contain more information on discriminator taps for many brands and models of scanners, including older models | ||
* [http://www.discriminator.nl/index-en.html Discriminator NL] | * [http://www.discriminator.nl/index-en.html Discriminator NL] | ||
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* [http://groups.yahoo.com/group/ScannerTech/ ScannerTech Yahoo Group] | * [http://groups.yahoo.com/group/ScannerTech/ ScannerTech Yahoo Group] | ||
* [[SCANDATA.FAQ]] | * [[SCANDATA.FAQ]] | ||
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Revision as of 17:15, 15 January 2018
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, UniTrunker, and DSD. 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.
Modifications
Also see the Scandata faq q2 article for a list of older scanners' tap points. This is from an original article written by the original scanner hacker and guru the late Bill Cheek.
Uniden
- BC-245 Discriminator Tap
- JPEGs of BC246 discrim tap
- BC296D/UBC 3300XLT
- BC350A Discriminator Tap
- BC350C Discriminator Tap
- BC-396T Discriminator Tap
- NOTE: You must be a member of the BCD396T Yahoo to view this message.
- The JPEG for the discriminator tap can be viewed here
- BC-780 Discriminator Tap
- BC785D Discriminator Tap
- BC796D Discriminator Tap
- BC895XLT Discriminator Tap
- BCD996 Discriminator tap point
- BCT15 Discriminator tap point
- NOTE: Look dead center of the circuit board, then go right and down. Both the 996 and BCT15 appear to share the same tap point location.
Radio Shack
- Pro-26 Discriminator Tap
- Pro-93 Discriminator Tap
- Pro-95 Discriminator Tap
- Pro-96 Discriminator Tap
- Pro 97 Discriminator Tap
- Pro-106 Discriminator Tap
- Pro-164 Discriminator Tap
- Pro-2052 Discriminator Tap
- Pro-2053 Discriminator Tap
- Pro-2066 Discriminator Tap
Other Radios
- Scanners not needing a tap to output discriminator based info
These scanner's listed below need no internal modification to allow discriminator info to be extracted. This would be though a Menu setting, that may need to be set to output data. Those setting would need to be reverted to default setting for programming and/or firmware updating.
Why use a resistor and/or capacitor ?
See #6 through 8 of this URL: Discriminator.nl FAQ
Wikipedia Page showing Circuit and calculations for Discriminator Tap.
- Related Pages
These pages or links contain more information on discriminator taps for many brands and models of scanners, including older models