FSK 9601
Page 2
Table of contents
Table of contents................................................................................................. 2
Preface ................................................................................................................. 2
Options for FSK9601........................................................................................... 2
Technical data FSK-9601-C ................................................................................ 2
Short description................................................................................................. 3
Bit-rate and baudrate .......................................................................................... 3
Digital interface - 20 pin connector ................................................................... 3
Signal description digital interface......................................................... 3
Connecting the FSK9601 to general TNC2........................................... 4
Connecting the radio to FSK9601 ...................................................................... 4
Modulator (Pin 1)................................................................................... 4
Demodulator (Pin 4) .............................................................................. 4
PTT (Pin 3) ............................................................................................ 4
GND (Pin 2)........................................................................................... 5
Standard FSK connection cable............................................................ 5
TRX4S, Kenwood, Yaesu, Azden etc.................................... 5
TEKK KS960 Tnet Mini ......................................................... 5
Settings and adjustments of modem FSK9601 ................................................ 5
Jumpers FSK9601................................................................................. 5
Bit-Error-Test (Jumper 1) ...................................................... 5
Permanent transmit on PTT (jumper 2)................................ 5
FSK / GMSK switch (jumper 3) ............................................. 6
Filter-select switch (jumper 4) ............................................... 6
Solder programmable jumpers in modem FSK9601 ............................. 6
Watchdog (solder jumper 16) ................................................ 6
Jumper J17 "RX-muting" ....................................................... 6
Jumpers for selecting the baudrate"...................................... 7
Test pins on modem FSK9601............................................................. 7
Setting the Baudrate with FSK9601................................................................... 7
Schematics Modem FSK9601-C......................................................................... 8
Component Location Modem FSK9601-C ......................................................... 9
Copyright for Hard and Software ....................................................................... 9
Preface
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 [email protected].
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.
If you need instructions how to modify a specific amateur radio transceiver for 9600 baud operation, ask us. We have a collec-
tion of many plans how to modify the transceivers. Write us an e-mail, we shall reply and attach the information requested if
possible.
Options for FSK9601
The FSK9601 board is tested and ready for use in the TNC3 or TNC31. For use with other packet-radio-controllers, it may be
necessary to use an additional 20 wire ribbon cable. The data exchange between TNC3/31 and the modem is NRZI-
formatted. If you want to use the FSK9601 with a TNC2, you need to order the option 'NRZ' because here the data format is
NRZ. The difference between standard NRZI and optional NRZ version is only the programming of two of the three GALs.
They are marked 'R', 'T' and 'C' for the optional NRZ version. The GALs cannot be changed, so you have to order the modem
with 'Option NRZ-GAL'
Most power of FSK9601 is consumed by the GALs. There are versions with 'zero-power-GALs' available, which reduce the
total supply current of the modem from 115 to 30 mA at 5 volt. The GALs cannot be changed, so you have to order the mo-
dem with 'Option Zero power GAL'
Standard speed options for FSK9601 range from 9600 to 307200 Baud. Receive and transmit baudrate may be different with
one modem, e.g. the combination receive 38400 and transmit 9600 is common for satellites with fast downlink data rates.
Receive baudrates from 2400 to 1228800 Baud and transmit baudrates from 9600 to 614400 Baud are possible.
Odd baudrates (not a 2
n
multiple of 2400 Baud) are available on special request.
Technical data FSK-9601-C
Power supply:
5 volt DC, typ 125 mA. (Option low-power: 30 mA) typical values.
Dimensions:
ca. Length=120mm, Width=41mm, Height=25 mm, mass approx. 45 grams
Radio interface:
5-pin DIN connector, same pinning as TNC2, TNC2S, TNC2H etc. Modulation (filter, scrambler) according to specifications of
G3RUH, speed: 9600 baud / 9600 bit/s (optional other baudrates).
AF-output level adjustable from 10 mV
pp
to 3.5 V
pp
, Ri: 2k
Ω
, DC-free. (up to 6 V DC permissible). Output is muted while
reception. PTT : max. 25V 0,1A to ground, input sensitivity: 100-700 mV
pp
at 100 k
Ω
, DC-free. A input limiter (0,5V
pp
) avoids
overdriving the amplifiers by short DC peaks at T/R switching.
