Ramsey Electronics RX433 Instructions Manual - page 3
RX-433
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THE RX433
This wireless RF receiver has a data output that will match the data sent by
the transmitter, TX433. The output is CMOS compatible when the unit is
run on +5 volts.
The demod bandwidth is selectable by the placement of jumpers on the
circuit board. The table on the schematic shows jumper positions for
different bandwidths. Narrower bandwidths will give slightly better range at
the expense of more limited constraints on battery voltage tolerance over
time and more limited operating temperature range. For most applications,
the 4800 Hz setting will be best.
ANTENNA CONSIDERATIONS:
The simplest antenna consists of a piece of wire approximately 6 to 7 inches
long. If you desire more range you can try a ground plane antenna or a
Yagi such as the Ramsey 4004 model. The antenna should be tuned for the
433 MHz band for best operation.