Data Slicer plans

[BJ_NORTON]

Does anyone know where I can get plans to make a data slicer? I have seen schematics on the site, and elsewhere, but I'm not so good and looking at a schematic and putting it on a breadboard. I can look at a schematic and say, "Oh thats a diode," or "thats a resistor," but I don't know ho to physically lay things out. I'm thinking something along the lines of Ramsey kit instructions. Can anyone help me out?

 

[crayon]

I have not seen a Ramsey kit .. but breadboarding has to be one of the easiest things to do in the world!!

Give yourself some credit and go for it!

 

[poltergeisty]

Here is a link for ones already built. Click me

Heres a pic. of an experimenters board 2 level interface or hamcom interface. Click me

You may want to know where to get your discriminator tap. Click me

Here are some more links found typing in slicer in the search.

Click me

Click me

Click me

Click me

I have included two pics. of slicers here, may have to magnify. When you build one make sure your wiring to the connector is right. Because you can easily forget and wire it to the connector backwards. :shock:
Boo!-Poltergeisty :-0

 

[poltergeisty]

How can you tell if a particular slicer is 2 level or 4 level?

I would like to know about this particular one because it looks like a pretty good slicer to use. So i've read. Boo!-Poltergeisty :-0

 

[SCPD]

How can you tell if a particular slicer is 2 level or 4 level?

A slicer (whether 2 or 4 level) will need to attach to GND. If the circuit is powered by the serial port, it will also need to attach to pins DTR and RTS (one for + voltage and the other for - voltage). For the actual signal, a 2 level slicer can feed it's signal into one of three pins - DSR, CTS, or DCD. You must configure your decoding software to accept data from the appropriate pin.

A four level slicer needs all three pins (so there's no need to specify which pin in software). The circuit you've given reads "CTS or DSR" for the output so it's a 2 level slicer.

-rick

 

[poltergeisty]

Alright thanks. I learn something everyday.

Now I wonder, if there is a way to change this circuit to 4 level?Boo!-Poltergeisty :-0

 

[SCPD]

Now I wonder, if there is a way to change this circuit to 4 level?

Just add a voltage divider and three comparators.

 

[poltergeisty]

I was wondering what kind of 4 level slicer do you use? Care to share a schematic? Thanks.Boo!-Poltergeisty :-0

 

[SCPD]

Take you pick. The 4 level circuits are half-way down the page.

http://www.radioreference.com/apps/wiki/index.php?title=Data_Slicers

They're all nearly the same - slightly different parts. I use a pair of 9 volt batteries for power.

Actually, I wouldn't mind if someone like pro92b were to upgrade these to use a more modem op-amp.

-rick

 

[poltergeisty]

18 volts is all right on a 12 volt slicer? In reference to the 4 level slicer and the 9 pin connector. Does 1, 6, 8, 5 refer to dcd, dsr, cts and grd. in that order?

I'm also wondering if one could use a 25 pin and 9 pin connector attached to the computer for two slicers running two programs at the same time? I heard somewhere here that you can run two audio sources into one slicer, left and right. Is this something that could work? If so Then I could have a 25 pin slicer and a 9 pin slicer both utilizing left and right audio inputs for a total of 4 Separate inputs. Boo!-Poltergeisty :-0

 

[Match]

data slicer

Hello,

I use the dataslicer, the 3rd one on the page http://www.radioreference.com/apps/wiki/index.php?title=Data_Slicers
the one with bleu and yellow colors.
Can you (somebody) tell me the settings (what switches to put on and off) pour un system moto type2 vhf apco25 with win98 and unitrunker v 1.17

 

[ka3jjz]

I'll simplify things for you. UniTrunker doesn't need a slicer - it states this on it's Wiki page. All you really need is a good clean tap from the discriminator in your radio.

73s Mike

 

[crayon]

All you really need is a good clean tap from the discriminator in your radio.

As ka2jjz pointed out, a "clean tap" is best achived by using a buffer between the discriminator tap of your radio and the sound card input.

rfmobile has detailed this in the Uniform.htm document avaiable after you install UniTrunker. Skip down to the "Hint for Project 25" heading.

 

[ka3jjz]

In addition our Discriminator Output Wiki page lists a few other places you can find information on where to properly tap your radio.

73s Mike

 

[Al42]

18 volts is all right on a 12 volt slicer?

It's a bit low, but it should work. (Remember, the normal voltage is 24 volts; +12 to -12 is a 24 volt difference.)

Match, the 3 switches on the right closed (making contact) for a 4-level slicer, the one on the bottom-left closed for a 2-level slicer.

And you can eliminate the parts not connected - all you need for 2 level is the op amp on the bottom left - for 4 level, take it, the switch and the 3 resistors (100 ohm, 10k and 1 meg) out.

Or you can leave the whole circuit as is - use a 4 pole, double throw switch, wired so that either the 4 level or the 2 level circuit is connected. Then you can switch between them by just throwing the switch.

 

[car2back]

Sorry to hijack the thread......

I have a question on the discriminator tap: Seeing as the interior of a handheld is so cramped for space, could you route the signal through the 3.5 mm headphone jack? correct me if I am wrong but isn't a stereo output?

if so, would it be possible to be connected so the discriminator audio is sent out of the jack on the right audio channel, while the regular audio is still on the left side? that way the jack can function both ways as a discriminator output and a mono audio out ?

thanks!

***EDIT: I am thinking about attempting this on my UBC-3300

 

[crayon]

I normally recommend that it would be best to install a stand-alone jack for a discriminator output. Of course, every radio is different ... and people do have their own preferences.

It may seem like a huge undertaking to install the tap .. but it is reall not *that* hard.