Channels connected on the CTA chip are zero and four (for compatibility with rx mode 100, and serial
operation)
Common features:
Interfaces
Input/output
Power
2 x 3.81mm pitch 3 pin "Phoenix" two part connectors
2.1mm connector and 2 pin "Phoenix" (these inputs are diode "or'ed"
together).
On/off slide switch on pcb
3 position jumpers
8 position DIP switch
4 position DIP switch (optional)
2 pin 0.1" pitch "Molex" serial connection
SMA(or optional screw terminal)
CTA88 mode
CTA88 address
Radio channel
Radio setup
RF
(optional)
Indicators
Power on LED
send/receiver LED
2 x I/O pin state LEDs
CTA88
Clock
Data rate 1kbit/sec Biphase coded burst
Part: Leaded 28 pin, in socket
3.58MHz (ceramic resonator)
Size
87 x 70 x 16mm (excluding connectors)
(four 3.3mm diameter mounting holes are provided)
Operating temperature
-20 to +70 degrees centigrade (some radios may be limited to -10/+55)
-30 to +70 degrees)
(Storage
TX Application board
Inputs
2.5 to 50v (5mA) opto isolated inputs with manual "test" pushbuttons
LED indicators on all channels
Link selectable DC supply (5v aux, 5v main, or unregulated Vin) on each
channel
(fit one link only on jumpers JP10)
Link selecting low power / normal mode (JP12)
Supply
6 –15V
idle current: 4mA
(standard mode)
3uA (low power mode)
transmit current (depends upon radio module fitted)
50mA with LMT2-433-5 fitted
Radio modules
any LMT version
transmitter versions of NiM2, BiM1, BiM1H, BiM2A, BiM3A/B RDL2 (tx).
(Fit R32. Idle current increases by 10mA)
Radiometrix Ltd
CTA28 Demo board
page 2
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