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SYMEK FSK-9601 User Manual

Packet-radio-modem
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Users Manual
for the
Packet-Radio-Modem
FSK-9601
Layout Version FSK9601-C
9600, 19200, 38400, 76800, 153600 Baud etc.
Issue 14/05/2005 12:52:00
Production and Distribution: SYMEK GmbH, Datentechnik, Ulf Kumm, DK9SJ
Adress: D-70597 Stuttgart (Sonnenberg), Johannes-Krämer-Straße 34
Phone: +49 711 76 78 923, Fax: +49 711 76 78 924, Hotline: +49 711 76 54 911
eMail: info @ symek.com
Internet: http://symek.com

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Summary of Contents for SYMEK FSK-9601

  • Page 1 9600, 19200, 38400, 76800, 153600 Baud etc. Issue 14/05/2005 12:52:00 Production and Distribution: SYMEK GmbH, Datentechnik, Ulf Kumm, DK9SJ Adress: D-70597 Stuttgart (Sonnenberg), Johannes-Krämer-Straße 34 Phone: +49 711 76 78 923, Fax: +49 711 76 78 924, Hotline: +49 711 76 54 911 eMail: info @ symek.com...

  • Page 2: Table Of Contents

    This manual should help you to use the FSK-Packet-Radio-Modem FSK9601 in your TNC3 or TNC31 controller and to install the connection to your radio transceiver. If there are any problems, you may ask for help vie a-mail at support@symek.com. With this manual, the expression "FSK9601" is used. However, all parts of the manual are valid for the various options of FSK9601 for baudrates from 4800 up to 614 kBaud as well.

  • Page 3: Short Description

    NF-filter: 8 bit wide, 512-tap FIR-Filter in the transmitter with 64-fold oversampling (DK9SJ-type). Active lowpass filters in TX and RX. All inputs and outputs to the radio are filtered with R-C-R filters for EMI suppression. A FSK-filter (raised cosine rolloff) and a GMSK filter are selectable by a jumper.

  • Page 4: Connecting The Fsk9601 To General Tnc2

    RXC (Pin 19) Receive Clock: (modem output): the output of the receive clock recovery circuit is sent to the TNC to synchro- nise the received data signal. RXD is stable at the rising edge of RXC. The frequency of RXC corresponds to the transmit clock of the remote transmitter.

  • Page 5: Gnd (Pin 2)

    Since about 1994, the industry begun to produce amateur radio transceivers with the necessary inputs and outputs for 9600 Baud FSK. The transceivers of Kenwood, Azden Alinco, Yaesu, ICOM, SYMEK use the same connector and pinning and are easy to connect to a FSK9600. The radios have a 6 pin mini-DIN socket (same type as for PS/2 keyboards). You have to make a simple cable with a 6 pin jack on the one side and the 5 pin DIN jack on the other.

  • Page 6: Fsk / Gmsk Switch (Jumper 3)

    As long as the transmitter is keyed (by TNC command or by jumper 2), the modem-transmitter is NOT muted. (DIN-Connector) (Trimmer) • • • • • • • • permanent transmit ON FSK / GMSK switch (jumper 3) With jumper 3, the transmit characteristic can be switched from the usual FSK-modulation to GMSK. Both modulation types are alike, if there is not much noise present, you will find no difference.

  • Page 7: Jumpers For Selecting The Baudrate

    Changeing the baudrate requires tools for smd part soldering and experience in handling such miniature parts. We do not recommend to change the baudrate. We shall publish the instructions for changeing baudrate on http://symek.com later. Known problems A white noise spectrum contains components, which are recognised by the DCD circuit of the FSK9601 as valid data signal.

  • Page 8: Schematics Modem Fsk9601-C

    Schematics Modem FSK9601-C FSK 9601 Page 8...

  • Page 9: Component Location Modem Fsk9601-C

    Component Location Modem FSK9601-C Copyright for Hard and Software There exists a copyright for the FIR filter EPROM to SYMEK GmbH or Ulf Kumm, DK9SJ. All other copyrights for schematics and board-layout belong to SYMEK GmbH or Ulf Kumm, Stuttgart.

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