TX1H_14 Datasheet, PDF (3/11 Pages) Radiometrix Ltd – VHF Narrow Band FM High Power TX

Functional description
The TX1H 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
TX1H
pin spacing:
2.54 mm
15.24 mm
123
4 5 67
7 holes of 0.7 mm dia.
pin spacing 2.54 mm
1 = RF gnd
2 = RF out
3 = RF gnd
4 = En
5 = Vcc
6 = 0V
7 = TXD
Figure 3: TX1H 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 input from the antenna
Pull high to enable Transmitter
3.8 – 15V DC power supply
Ground
DC coupled input for 3V CMOS logic. R_in = 100kΩ
NOTES:
1. EN pin should not be left floating
2. For Vcc greater than 9V, transmit duty cycle must be limited to 25% or less
Radiometrix Ltd.,
TX1H high power transmitter data sheet
Page 3