In the US, the Federal Communications Commission (FCC) offers three Amateur Radio license levels or license classes; Technician class license, General class license and Extra class license. Per FCC Rule 97.523 only one question pool may exist for each license examination level. Each question pool must contain at least 10 times the number of questions required for a single examination. The question pools are normally valid for 4 years.
With only three license classes, earning a license has never been easier!

Construction

Using a cell, mobile, or GSM phone, or a two-way radio in close proximity to an Avaya IP telephone might cause interference. Documentation disclaimer “Documentation” means information published by Avaya in varying mediums which may include product information, operating instructions and performance specifications that Avaya may generally.

The FSK9601 is intendedfor use with the TNC3S or TNC31 Packet-Radio Controller. Dimensions: 120x40 mm.The modem is connected to the TNC with a 20 pin flat ribbon cable. The trimmerfor output voltage can be accessed through a window on the TNC3 rear panel. Theradio transceiver is connected via a 5 pin standard DIN plug.

FSK9601

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Data

The FSK9601 is a FSK-modemwhich receives and transmits data according the G3RUH-standard. It produces aband-limited data signal with 9600 baud data rate and can be modified to otherspeeds from 4800 up to 614k Baud by changeing some components and jumpers.

The FSK9601 transmitfilter and receiver design was developed by Ulf Kumm, DK9SJ. The scramblingalgorithm is compatible with the G3RUH standard, the PGA design was derived froma design of DF9IC.

Model 9601 Radio Instructions Printable

Model 9601 Radio Instructions Model

power supply: 5 V approx. 120 mA from the TNC

muting: the transmitter is muted when receiving.

PTT-watchdog: contunuous transmit time is limited to approx. 20 sec (may be disabled by a jumper)

bit-error-test jumper: a constant '1' may be transmitted when the according jumper is closed.

transmit jumper: for tests, the modem may be set to continuous transmit mode by a jumper.

high impedance input (100 kOhm // 100pF) 50 - 500 mV input voltage required.

output voltage adjustable 10 mV to 3 V, 2 kOhm series resistance, DC-decoupled.

3 test points for TX, RX and PTT

input voltage limiter prevents overdrive due to changes of the dc voltage across the input when switching from transmit to receive mode

FIR-filter programmed for FSK (cos-rolloff characteristics) and GMSK filter response. 128-tap FIR-filter with 128 taps (16-fold oversampling x 8 bit length). The digital filter produces a minimum of distortions and harmonics.

flexible baudrate: the board is designed for a variety of transmit and receive baudrates, ranging from 4800, 9600, 19200, 38400, 76800, 153600, 307200 up to 614400 Baud FSK. Transmit and receive baudrate can be selected different, e.g. for satellite use with 9600 Baud uplink and 38400 baud downlink.

suited for full duplex (simultaneous transmit and receive)

Model 9601 Radio Instructions Manual

how to order / prices of FSK9600 and related products