Common features:
Interfaces
Input/output
Power
8 x 3.81mm pitch 3 pin "Phoenix" two part connectors (JP1 – JP8)
2.1mm DC power connector (JP15) and 2 pin "Phoenix" (JP14).
(these inputs are diode "or'ed" together)
On/off slide switch (S3) on pcb
CTA88 mode
CTA88 address
Radio channel
Radio setup
RF
3 position jumpers (JP12)
8 position DIP switch (S1)
4 position DIP switch (optional) (S2)
2 pin 0.1" pitch "Molex" serial connection
SMA (or optional screw terminal) (CON1)
(optional) (JP13)
Indicators
CTA88
Size
Power on LED (D10)
send/receive LED (D9)
8 x I/O pin state LEDs (D1 – D8)
Clock
3.58MHz (ceramic resonator)
Data rate 1kbit/sec Biphase coded burst
Part: Leaded 28 pin, in socket
TX & RX boards 115 x 86 x 20mm (excluding connectors)
(four 3.3mm diameter mounting holes are provided)
Operating temp.
-20°C to +70°C (some radios may be limited to -10°C to +55°C)
(Storage
-30°C to +70°C)
CT88 TX Application board
Inputs
2.5V to 50V (5mA) opto-isolated inputs with manual "test"
pushbuttons (SW1 – SW8)
LED indicators on all channels
Link selectable DC supply (5V aux, 5V main, or unregulated Vin) on
each channel. (fit one link only on jumper JP10)
Link selecting low power / normal mode (JP11)
Supply
6 –15V DC
7 –15V DC for 400-500mW high power variants
idle current: 4mA (standard mode)
3µA (low power mode)
receive current Depends upon receiver module fitted
transmit current Depends upon transmitter module fitted
50mA with LMT2-433-5 fitted
Radio modules
any LMT1, LMT2 or LMT3 version
transmitter versions of NiM2, BiM1, BiM1H, BiM2G, BiM3B,
RDL2(tx). (Fit R32. Idle current increases by 10mA)
Radiometrix Ltd
CTA88 application board manual
page 2
RADIOMETRIX [ RADIOMETRIX LTD ]
