Datasheet Archive:

http://wyjen.com/datasheets/GTR315M_M13A_datasheet.pdf

Demo Projects using Wireless Transceiver:

https://www.youtube.com/watch?v=yXdEvxuk1xo

https://www.youtube.com/watch?v=p1_ACEaSnC0

Key Features

The key features of the transceiver module are:

• Carrier frequency of 315 Mega Hertz

• Supports Frequency Shift Keying (FSK)

• Supports 3.3V or 5V input digital data

• Supports two modes of operation: power-down and power-up

• Transmit bit rate up to 66Kbps using NRZ line encoding or 33Kbps using Manchester line encoding

• Selectable Supply voltage range of 3.3V or 5V

• Selectable transmit/receive mode

• Operating temperature range of -40 to 125 degrees

• Antenna matching input of 50 ohms for TX or RX mode

• Low power consumption

• Provides TX/RX data via a 6 pin header with 100 mil spacing between pins and power and ground on separate 6 pin header with same spacing

• Module dimensions are 1.6 inches wide by 1 inch height

Targeted Applications

Some of the targeted applications of the GTR315M_M13 transceiver are:

• Remote controlled garage door openers

• Remote controlled robotics

• Remote keyless entry systems

• Remote controlled toys

• Wireless sensors

• Wireless computer peripherals

• Wireless security systems

• Wireless game consoles

• Wireless pressure monitoring systems

Ordering Info

Manufacturer/Distributor	Part Number	Online Store	Sales
WyJen Technologies Incorporated	GTR315M-M13A	www.wyjen.com	1-800- 490-4165

Description

A top view of the GTR315M-M13 transceiver module is shown in Figure 1. The GTR315M-M13 transceiver module uses frequency shift keying with data rates up to 33000bps using Manchester encoded data or 66000bps using non return to zero encoded data. The module operates at two popular voltage source levels: 3V or 5V. In particular this module easily targets battery wireless applications using 3.3V. It also operates at the 5 volt supply which is typical for university laboratories. This module can also be used for non-battery applications with low noise sources.

The module integrates a transmitter and receiver section that uses a phase locked loop, low noise amplifier, and power amplifier. The receive section of the GTR315M-M13 module consists of a low noise amplifier with good sensitivity as low as -110dB. The transmit section of the GTR315M-M13 module consists of a power amplifier with a typical output power of 10dBm. Both the transmit and receive sections use a phase locked loop to modulate and demodulate the digital data, respectively. The module also provides a shutdown feature for low power consumption with a typical current of 0.8A.

The GTR315M-M13 module provides a transmit/receive input and bidirectional data which can be easily interfaced to and controlled by a baseband processor or programmable logic device. Other features of the module is that it is robust and rugged and can fit in small areas.

Figure 1. Illustration of GTR315M-M13 transceiver module showing pins. Note: Top view is from component side.

Input/Output Pin Description

The function of each pin for the GTR315M_M13 transceiver module is described in Table 1.

Table 1. Pin description table for the GTR315M-M13 transceiver module.

GTR315M_M13 5V or 3.3V Power Supply Configuration Table

The Table below describes shows to put the module in 5V or 3.3 power supply operation.

Table 2. GTR315M_M13 power supply configuration.

GTR315M_M13 Auto-Calibration of Automatic Gain Control Table

Table 3 shows how to set the automatic gain control operation of the GTR315M_M13 module. The AGC is disabled when AGC0=0 and AGC1=0. The dwell time is used after the AGC has been enabled. The dwell time is the time that that the module waits before adjusting the gain. When the AGC is enabled using any of the three on states in Table 3 the strength of the incoming RF signal is monitored. When the strength is –55dB (strong RF signal) the module waits for a certain amount of time (dwell time) before reducing the gain of low noise amplifier (LNA). When the RF signal strength is -59dB the module waits a certain amount of time (dwell time) before increasing the LNA gain. If after the dwell time the RF signal changes back to the original RF level the LNA gain will remain unchanged.

Table 3. GTR315M_M13 AGC configuration.

3.3 Volt Application Circuits

Figure 2 and Figure 3 demonstrate how to put the GTR315M_M13A in transmitter and receiver mode respectively system using 3.3V volt operation. Figure 2 shows the transceiver configured as a 3.3V FSK transmitter while Figure 3 shows it configured as 3.3V FSK receiver.