remote, frequency | Technical / Troubleshooting

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#21699 - 02/11/2000 08:56 remote, frequency
anti member Registered: 10/07/2000 Posts: 117 Loc: BaWue, Germany, Europe	Can anyone tell me the frequency that the KCA-R6A uses ? I'm thinking about using my empeg-remote for everything. -------------------- MKII 08000073 12GB BLUE _________________________ -------------------- MKII 08000073 40GB BLUE
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#21700 - 02/11/2000 09:05 Re: remote, frequency [Re: anti]
schofiel carpal tunnel Registered: 25/06/1999 Posts: 2993 Loc: Wareham, Dorset, UK	It's Infra Red, not radio. Are you talking about the encoding scheme the remote uses? One of the few remaining Mk1 owners... #00015 _________________________ One of the few remaining Mk1 owners... #00015
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#21701 - 02/11/2000 09:29 Re: remote, frequency [Re: schofiel]
anti member Registered: 10/07/2000 Posts: 117 Loc: BaWue, Germany, Europe	I was talking about the base frequency of the signal. Right now I'm working with RC5 (Philips and others) which uses 36kHz. I have a small receiver module (TSOP1736) in every room and would like to know which one to use for the KAC-R6A. I really prefer this tiny thing over my big old Philips remote. -------------------- MKII 08000073 12GB BLUE _________________________ -------------------- MKII 08000073 40GB BLUE
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#21702 - 02/11/2000 10:43

Re: remote, frequency [Re: anti]

bmihulka
enthusiast

Registered: 15/06/1999
Posts: 259
Loc: Lincoln, NE

Here is some info describing the Kenwood protocol.

******************************************************************************
                              TECHNICAL INFO
******************************************************************************
Code length:            32 bits
Carrier:                39.2kHz

The code is only transmitted once, and after that a stop code is transmitted.



             +--------------------------------+                   
Header:      |                                |                  
             +                                +----------------+..
                            16T                       8T
                           8.8ms                     4.4ms

             +--+      
1 is coded:  |  |      
           ..+  +------+..
              T   3T

             +--+  
0 is coded:  |  |  
           ..+  +--+..
              T  T 

              +--------------------------------+        +--+
Stop code:    |                                |        |  |
              +                                +--------+  +
                              16T                  4T     T
                             8.8ms                2.2ms

T = 550us

Space between transmissions: 95000us between the start of the codes.

To use the code (not with the remote package):
GROUP * 10000h + (Code * 100h) + (Code XOR FFh)

Brian

-See my empeg here-

_________________________
Brian

-See my empeg <a href="www.hulkster.net/empeg" target="_blank">here</a>-

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#21703 - 02/11/2000 12:37 Re: remote, frequency [Re: anti]
schofiel carpal tunnel Registered: 25/06/1999 Posts: 2993 Loc: Wareham, Dorset, UK	I think you mean the signal clock rate at which the words are generated. Not too sure, I'm afraid. One of the few remaining Mk1 owners... #00015 _________________________ One of the few remaining Mk1 owners... #00015
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#21704 - 03/11/2000 04:35 Re: remote, frequency [Re: bmihulka]
anti member Registered: 10/07/2000 Posts: 117 Loc: BaWue, Germany, Europe	In reply to: Carrier: 39.2kHz Thanks, that's exactly what I wanted :) It looks like I have to replace all my 36kHz modules with 40kHz modules :( At least it's not 455kHz (old Kenwoods...) And a TSOP1740 is only ~1$ -------------------- MKII 08000073 12GB BLUE _________________________ -------------------- MKII 08000073 40GB BLUE
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#21705 - 03/11/2000 21:50 Re: remote, frequency [Re: bmihulka]
borislav addict Registered: 30/04/2000 Posts: 420 Loc: Sunnyvale, CA, USA	A related question: I'm toying with the idea of buying an infrared keyboard and getting it to work with the empeg. I know I'll have to write a driver from scratch, but can I expect the IR port to physically be able to pick up signals from a random IR transmitter? What parameters do I have to make sure to match? Thanks, Borislav
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