TXM-418-RM Linx Technologies Inc, TXM-418-RM Datasheet - Page 2

• Manufacturer Part Number: TXM-418-RM
• Description: TRANSMITTER RF 418MHZ
• Manufacturer: Linx Technologies Inc
• Series: RMr

Specifications of TXM-418-RM

• Frequency: 418MHz
• Applications: ISM, Remote Monitoring, Telemetry
• Modulation Or Protocol: ASK, OOK
• Data Rate - Maximum: 10 kbps
• Power - Output: -4dBm ~ 4dBm
• Current - Transmitting: 6mA
• Data Interface: PCB, Through Hole
• Antenna Connector: Through Hole
• Voltage - Supply: 5.9 V ~ 9 V
• Operating Temperature: -10°C ~ 55°C
• Package / Case: SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Other names: TXM-418-RM-R

MODULE DESCRIPTION
fi g u re 1: LINX-TX bl o ck diagra m
THE SAW BASED DESIGN ADVA N TA G E
Page 2
The RM Series is a SAW- ( S u r face Acoustic Wave) based transmitter designed
to be utilized in combination with a matching RM Series receive r. By adding a
simple antenna, the pair can tra n s fer serial data at distances well in ex c e s s
of 500 fe e t . The range of the RF link is widely va ri a ble and depends upon
m a ny factors including the type of antenna employed and the opera t i n g
e nv i r o n m e n t . The 500 ft. quoted range is a conserva t i ve operating distance
over open ground using 1/4-whip antennae at both ends of the link at 5 fe e t
a b ove the gr o u n d . Use of a less efficient antenna or adverse env i r o n m e n t a l
factors such as interfe r e n c e, obstacles, or multipath can substantially reduce
the link’s reliable wo rking ra n g e. S l owing the data rate or utilizing a directional
antenna (especially on the receiver) can provide increased perfo rmance bu t
m ay not comply with licensing requirements. It is recommended that yo u r
individual application be rev i ewed with Linx prior to entering production or
seeking approva l s.
The SAW (Surface Acoustic Wave) device provides a highly accura t e
frequency source with excellent immunity to frequency shift due to age or
t e m p e ra t u r e. By using a SAW to insure accurate frequency control on the
t ransmitter module the receive r ’s pass opening can be quite narrow, resulting
in outstanding sensitivity and greater immunity to interfe ring signals. In order
to frequency modulate this carrier the SAW is ex t e rnally pulled to obtain the
n e c e s s a ry dev i a t i o n .
By employing a SAW on both the RM transmitter and receiver the units prov i d e
an excellent perfo rmance ri valing far more complex and costly systems. T h e
S AW dev i c e, in combination with advanced design and manu fa c t u ri n g
t e c h n i q u e s, has made it possible to dramatically reduce the size and cost of
an RF link while enhancing its perfo rm a n c e. The end user benefits from
i m p r oved product range and reliability and the OEM manu facturer from lowe r
cost and simpler manu fa c t u ring procedures.