The CDP-TX-02F-R transmitter and CDP-RX-02F-R receiver are upgrades of Circuit Designs' CDP-02 series industrial radio modules. Operating in the 434MHz ISM band, the 128-channel model comes in two versions. One uses 7-bit DIP switches for changing channels, while the other is externally controlled through connector pins. Users can select between 128 channels in 12.5kHz steps, and choose between 10 and 1mW operation. Selecting 1mW enables continuous transmission in all 128 channels. The blocking performance and selectivity of the receiver has been improved to achieve receiver class 1 classification as defined in EN300220.Circuit Design, A4.365