31
Connecting to a computer for amateur radio data mode communication
The G90 transceiver can be connected to a computer to perform data communication in conjunction with the appropriate control
software.
Operation:
1.
Connect the data cable between the USB port on your PC and the communication port on the left side of the G90 head unit;
2.
Ensure that the appropriate driver for the USB cable is correctly installed on the PC;
3.
Connect the G90's audio output (AF_OUT pin of the ACC port) to the computer's audio input port. Set the output signal level
(see page 27);
4.
Connect the audio output of the computer to the audio input port of the G90 (AF_IN pin of the ACC port). Set the input signal
level (see page 27);
5.
Set the G90 to line input mode (see page 27);
6.
Select the desired working mode to perform data communication.
To prevent interference, the radio and computer must be well grounded. We also recommend installing ferrite rings on the data- and
audio cables, as close as possible to the radio, to minimize the possibility of electromagnetic interference.
The amplitude of the output signal of the radio and the amplitude of the output signal of the computer should be set appropriately to
avoid overloading.
A good rule of thumb is to set the PC’s audio output level so the transceiver is delivering no more than 10 Watts RF
output. As digital modes operate on a 100 percent duty cycle, TX output power should never be set at maximum. Monitor the
temperature of the transceiver closely, as additional cooling may be required.
Sinotel
UK
Limted
