QTech Data Systems DATRAN Q80 Telemetry Radio - Manual (Page 8)

FUNCTIONALITY FUNCTIONALITY FUNCTIONALITY FUNCTIONALITY
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Q80 – Telemetry Radio Motherboard layout.
Maxon Radio Module. Maxon Radio Module. Maxon Radio Module. Maxon Radio Module.
The Maxon Radio module is a totally self contained state of the art fully synthesized radio transceiver.
The picture to the right shows the Maxon radio module installed on the Q80 Motherboard.
The key features of the Maxon Radio module include:
Fully synthesised 16 channel receiver and transmitter.
Each of the 16 channels can be programmed for:
•
12.5 kHz or 25 kHz channel spacing.
• Simplex or repeater operation.
•
0.5 to 5 watts output in 8 steps.
Low power consumption Standby 80mA, Receive 100mA and
Transmit 1.2A at 5 Watts output.
Aerial BNC connector 50 ohms unbalanced.
Small, compact, environmentally sealed and rugged.
Power Supply Power Supply Power Supply Power Supply
The Q80 Module is designed to operate with a DC power supply voltage of nominally 12 volt. The Q80 Module
draws approximately 80mA in Standby, 100mA on Receive and 1.2A on Transmit at 5 Watts output.
The power connector is located on the bottom panel of the Q80 Module and is labelled ‘PWR’. The connections to
the power connector are:
G Ground. The negative lead of the power supply.
+IN The positive lead of the power supply.
CTL The remote power ON/OFF control input.
Note The Q80 Module has a 2 amp fuse on the Q80 Motherboard to protect the unit under fault conditions or
when reversed polarity or over-voltage power supplies are connected to the module.
Refer to the
Technical Notes for details on how to replace this fuse.
The DC power supply to the Q80 Module must be adequately smoothed and be free from noise and voltage
transients. Where the DC supply is derived from the AC mains, or batteries with an associated AC mains battery
charger these devices must comply with the required electrical regulations.
Note The maximum input voltage to the Q80 Module is 15 volts. Input voltages in excess of 15 volts will blow
the internal 2 amp fuse.
The power supply of the Q80 Module includes a remote power ON/OFF control line. This allows the Q80 Module to
be switched OFF remotely by a Q22 – DATRAN eXcel module when the system battery voltage drops too low.
This feature prevents the Q80 Module from totally discharging the system battery and eliminates the possibility of
erratic operation.
Radio Interface Radio Interface Radio Interface Radio Interface
The embedded Maxon Radio interface on the Q80 Motherboard provides a simple and versatile half duplex
interface between the Q80 Module and
QTech RTU modules or customer specific equipment.
The interface provides opto-isolation of both the transmit key and the receive busy lines. A bi-directional audio
interface connects the transmit and received audio to the auxiliary equipment via an external line isolation audio
transformer. Potentiometers on the Q80 Motherboard are provided to independently adjust both the receive and
transmit audio levels for customer specific applications.
The Q80 Module is easily interconnected to an associated QTech RTU module via a standard QTech DATRAN 6
way DIN radio patch cord.