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Details, datasheet, quote on part number:QFMT1-434
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Datasheet text preview:
QM Transmitter Module Features · MINIATURE SIL PACKAGE · UNIQUE QM (QUASI AM/FM) DESIGN · DATA RATES UP TO 10KBITS/S · OPTIMAL RANGE 500m (433.92 MHz
Version)
QFMT1-XXX
· · · · · ·
433.92 / 868 / 916.5 MHz VERSIONS SAW STABILISED QUASI AM/FM TRANSMISSION 3 TO 9 VOLT SUPPLY VOLTAGE INDUSTRY PIN COMPATABLE UNIQUE MODULATION SCHEME (High Interference Rejection) APPROVED TO EN 300-220-1
Applications · VEHICLE ALARM SYSTEMS · REMOTE GATE CONTROLS · GARAGE DOOR OPENERS · DOMESTIC AND COMMERCIAL SECURITY
Compatible Receiver Modules · QMR1-XXX (see data sheet QMR1) · QFMR2-XXX (see data sheet QFMRX) · QFMR3-XXX (see data sheet QFMRX) · QTRC1-XXX Transceiver (see data sheet
QTRC1)
General Description
The QFMT1-XXX miniature transmitter UHF radio module enables the implementation of a simple telemetry link at data rates of up to 10Kbit/s when used with one of the compatible Quasar receiver modules. Available for operation at 433.92, 868 and 916.5 MHz these modules are able to transmit at distances of up to 500m (433.92 MHz version).
The QFMT1-XXX module will suit one-to-one and multi-node wireless links in applications including building and car security, remote industrial process monitoring and computer networking. Because of its small size and low power requirements, this modules is ideal for use in portable battery powered wireless applications
QFMT1 rev 1.3 May 00
Reg No 3678152
Page 1
QM Transmitter Module Absolute Maximum Ratings: Transmitter
Operating temperature: Storage temperature: Supply Voltage (pin 3) Data input (pin 5) RF Out (pin 2) -20 °C to +55°C -40 °C to +100°C 10V 10V ±50V @ 10MHz
QFMT1-XXX
Electrical Characteristics: Transmitter
pin DC LEVELS Supply voltage Current & RF POWER 433.92 Supply current @ VC C = 5V (data low/high) RF power @ VC C = 5V 868 Supply current @ VC C = 5V (data low/high) RF power @ VC C = 5V 916.5 Supply current @ VC C = 5V (data low/high) RF power @ VC C = 5V RF & Data nd 2 harmonic Harmonics @ > 1GHz Initial frequency accuracy Overall frequency accuracy FM deviation (±) Modulation bandwidth @ -3dB Modulation distortion (THD) Power up time to full RF Data rate Data pulse width Note 1: measured into a 50 impedance 100 100 3 2 3 2 3 2 3/12 +8 5/16 +3 5/16 +3 mA dBm mA dBm mA dBm dBc dBc KHz KHz KHz KHz % µs 20000 bits/s µs 1 1 1 1 1 1 1 1 3 min. 3.0 Typ. 7.0 max. 9.0 units Volts notes
0
0
0 -50 -46 ±75 ±1 0 0 10 20 10
QFMT1 rev 1.3 May 00
Reg No 3678152
Page 2
QM Transmitter Module Connection Details General Information
QFMT1-XXX
Quasar UHF Radio Transmitter
The Quasar transmitter module implements a unique quasi AM/FM modulation scheme that puts the baseband data signal onto the RF carrier in two different ways. Firstly the carrier is shifted in frequency (typically 20 KHz) which generates the normal FSK spectrum, but simultaneously the RF carrier is also amplified thus yielding the ASK spectrum. 3 4 5 Utilising the quasi AM/FM modulation technique with one of the compatible Quasar receivers will yield a highly efficient wireless link.
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2
Figure 1: Quasar Transmitter
Pin Description:
RF GND (pin 1) RF ground pin, internally connected to pin 4 (0V). This pin should ideally be connected to the nearest ground plane (e.g. coax braid, main PCB ground plane etc.) RF OUT (pin2) 50 RF antenna output. To achieve best results the antenna impedance must match that of the module. VCC (pin 3) + Ve supply pin (3.0 to 9.0 volts). The module will generate RF when VC C is present. It is strongly recommended that a 100nF capacitor decouples the supply rail as close as possible to this pin. GND (pin 4) Supply and data ground connection, connected to pin 1. Data IN (pin 5) This input has an impedance of 47K and should ideally be driven by a CMOS logic drive or compatible. The drive circuitry should be supplied with the same supply voltage as the Tx module. Note: Because of the way Quasi Modulation operates the QMR1 and the QFMT1 will not work reliably in close proximity to each other.
QFMT1 rev 1.3 May 00
Reg No 3678152
Page 3
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