QTech Data Systems DATRAN Q80 Telemetry Radio - Manual (Page 17)

TECHNICAL NOTES TECHNICAL NOTES TECHNICAL NOTES TECHNICAL NOTES
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First set the transmit audio level. Feed a –3dBm 1800Hz audio signal into the audio terminals of the 6 way DIN
Modem connector. Pin No1 and Pin No 2. Connect a deviation meter to the BNC RF connector terminated at 50
ohms. Key the transmitter on by pulling Pin No 4 of the 6 way DIN Modem connector to ground. Adjust VR2 for +/-
3kHz (+/- 1.8 kHz) transmitter deviation.
Now set the receive audio level. Connect a dBV meter to the audio terminals of the 6 way DIN Modem connector.
Pin No1 and Pin No 2.
Connect a calibrated RF signal generator to the BNC RF connector set to the required
frequency and +/- 3kHz deviation at 1800Hz. Adjust VR1 for a received audio level of –15dBm.
Recheck the transmit audio level as described above and re-adjust as necessary.
Maxon Radio Maxon Radio Maxon Radio Maxon Radio
The Maxon radio is fully programmable through specialised programming equipment. Qtech offers complete
Maxon radio after sales service and reprogramming facilities.
The radio module has 16 available channels which are set by DIP switches, similar to the module address of an
RTU.
To access the channel select switches, undo the four posi drive screws of the Maxon radio module and remove the
top cover.