User's Manual

D0 to D7 changes the frequency of the transmitter. If the pins D0 to D7 are all open the
transmitter works with the lowest programmed frequency. The frequency adjustment is digitally
coded. Grounding of D0 rises the frequency about the channel spacing 25KHz. D1
rises about double D0, D2 rises about double D1 and so on. So D7 rises the frequency about
1600 times of D0 (2
7
), that means 3.2MHz with 25KHz spacing.
You can only use the preprogrammed frequencies. No other frequency is possible. The
standard version uses 68 channels in the frequency range from 433.0625 to 434.775MHz
with a 25KHz spacing. If you programm a channel higher than 137 the frequency will stay
the same than on 137. The complete frequency list is available as PDF on our homepage or
by email. Please contact [e-mail].
Vdd Supply Voltage 3.5-10V DC
Mod. Modulation Input
SB Standby Pin:
Standby if open
Transmitting if grounded
GRD Ground
D7 MSB of frequency control
.
.
D0 LSB of frequency control