CTA28 RADIOMETRIX [Radiometrix Ltd], CTA28 Datasheet - Page 4

• Manufacturer Part Number: CTA28
• Description: CTA88 chip based 2-channel I/O Application Boards
• Manufacturer: RADIOMETRIX [Radiometrix Ltd]

TX DIP switches
The TX encoder board has 4 jumpers and 2 DIPswitches. The jumpers are used to select the number of
operating modes featured in the board while the 4 way and 8 way DIP switches are used for frequency
channels selection and address selection respectively.
RX Application board
Figure 3: CTA28 RX application board PCB (top view)
Radiometrix Ltd
JP11
JP12
JP13
R32
LOW
POWER
MODE
RADIO
SETUP
Selects low power or normal mode
Normal mode draws 5mA quiescent
current:
Low power draws 3uA, but if "low
power" operation is selected then the
coder device and transmitter are only
activated when one of the inputs is
"active". Therefore only modes 001
and 100 can be used with this option.
Selects Operating modes
Radio setup (only for LM series radios)
Factory fitted for RDL2 (tx) use. Idle current increases by 10mA
CTA28 Demo board
Up
Down
see operating mode section below
Ground (GND) and the RS232 input
to the PGM pin
Normal
Low power (default)
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