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UHF Wide Band FM 450mW Transmitter
TX3H
The TX3H-869.5-10 is an 869.5MHz FM transmitter module with a power output of 450mW nominal. It is a 100% pin-compatible drop-in replacement for the Radiometrix TX1H-151.300-10 and can be used in applications where greater radiated power is desired (for example when space limitations dictate the use of small and inefficient antennas, or for applications where the extra power is permitted). The module will handle raw data rates up to 10kbps.

Figure 1: TX3H-869.50-10 and RX3A-869.85-10

Features

  • Standard frequency: 869.50MHz band
  • Data rates up to 10kbps
  • Usable range over 3km
  • Fully screened
  • Low power requirements
The TX3H operates on European 869.40 - 869.65MHz sub-band allocation for 500mW and is designed to meet EN300 200-3 (radio) and EN301 489-3 (EMC) requirements. Custom frequencies may be available to order.
 

Technical Summary

  • Transmit power: 450mW (26.5dBm, ±1dB)
  • Operating frequency: 869.50MHz
  • Supply: 5V (regulated)
  • Current consumption: 310mA (typical)
  • Data bit rate: 10kbps max.
  • ·Size: 45 x 17 x 5.5mm
Applications
  • Tracing and asset tracking systems
  • Meter reading systems
  • Industrial telemetry and telecommand
  • Data loggers
  • In-building environmental monitoring and control
  • High-end security and fire alarms
  • Social alarms
  • Vehicle data up/downloa

Evaluation Platform: Universal Evaluation kit or Narrow Band Evaluation Kit
Matching Receiver: RX3A-869.85-10

User interface

Click on the image for EXPANDED VIEW Figure 2: TX3H pin-out and dimension (compared to TX3A)

 
TX1H pin Name Function
1, 3 RFgnd RF Ground
2 RF out 50W RF output to the antenna
4 EN
Pull high to enable Transmitter
5 Vcc 5V regulated DC power supply
6 0V Supply Ground
7 TXD DC coupled input for 5V CMOS logic. Rin = 100kW
NOTE: Pin out as TX1H and standard TX3A
 

Performance specifications

Operating temperature: -40°C to +85°C

(Figures apply at +25°C, 5.0V supply unless otherwise stated)

General pin min. typ. max. units notes
 
DC supply
Supply voltage
5, 6
4.9
5
5.1
V
TX Supply current
5, 6
-
310
-
mA
 
RF
RF power output
2
+25.5
+26.5
+27
dBm
1
Spurious emissions, <1GHz
2
-
-
-54
dBm
2
Spurious emissions, >1GHz
2
-
-
-40
dBm
2
RF centre frequency
-
869.50
-
MHz
3
Initial Frequency accuracy
- 15
0
+15
kHz
2
Overall Frequency accuracy  
- 40
0
+40
 
5
FM deviation (peak)
-
±27
-
kHz
4
Antenna pin impedance
2
-
50
-
W
Number of channels
-
1
-
 
Baseband
Modulation bandwidth @ -3dB
0
-
8
kHz
6
Maximum raw data rate
-
10
16
kbps
6
TXD input level (logic low)
7
-
0
-
V
7
TXD input level (logic high)
7
-
5.0
-
V
7
 
Dynamic timing
TX select to full RF
-
53
55
ms
 
Notes:
1. Measured into 50W resistive load
2. Meets EN requirements at all frequencies
3. There is a <10% duty cycle restriction on 869.50 MHz in EU member states
4. Total over full supply and temperature range
5. With 0V - 5.0V modulation input
6. 5V CMOS compatible
7. To achieve specified FM deviation
 

Limitation of liability

The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd reserves the right to make changes or improvements in the design, specification or manufacture of its subassembly products without notice. Radiometrix Ltd does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. This data sheet neither states nor implies warranty of any kind, including fitness for any particular application. These radio devices may be subject to radio interference and may not function as intended if interference is present. We do NOT recommend their use for life critical applications.
The Intrastat commodity code for all our modules is: 8542 6000.

R&TTE Directive

After 7 April 2001 the manufacturer can only place finished product on the market under the provisions of the R&TTE Directive. Equipment within the scope of the R&TTE Directive may demonstrate compliance to the essential requirements specified in Article 3 of the Directive, as appropriate to the particular equipment.
Further details are available on The Office of Communications (Ofcom) web site:
Licensing policy manual

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