Functional description
The HX1 transmitter consists of a frequency modulated Voltage Controlled Crystal Oscillator (VCXO)
feeding a frequency doubler with two stage amplifier and RF filter. Final Power Amplifier stage is
factory pre-set to appropriate band power level. Operation can be controlled by the EN (Enable) line,
the transmitter achieving full RF output typically within 5ms of this line being pulled high. The RF
output is filtered to ensure compliance with the appropriate radio regulations and fed to the 50Ω
antenna pin.
User interface
43mm
5mm
14.5mm
HX1(300mW)
pin spacing:
2.54 mm
15.24 mm
1 = RF gnd
2 = RF out
3 = RF gnd
4 = En
5 = Vcc
6 = 0V
7 = TXD
1
2
3
4
5
6
7
7 holes of 0.7 mm dia.
pin spacing 2.54 mm
Figure 3: HX1 pin-out and dimension
TX1H pin
1, 3
2
4
5
6
7
Name
RFgnd
RF out
EN
VCC
0V
TXD
Function
RF Ground
50Ω RF output to the antenna
Pull high to enable Transmitter
5V regulated DC power supply
Ground
DC coupled input for 5V CMOS logic. R
in
= 100kΩ
Note:
Pinout and footprint as TX1. (but PCB is longer)
Radiometrix Ltd.,
HX1 high power transmitter data sheet
Page 3
RADIOMETRIX [ RADIOMETRIX LTD ]
