Condensed specifications
Frequency
458.5 - 459.1MHz (in UK allocation) as standard
Other UHF frequencies available on request
+/- 1.5kHz
Frequency stability
Channel spacing
25kHz (12.5kHz by special order)
Number of channels
255 channels controlled via RS232 interface (8 parallel selected)
Supply
voltage
Current
6v - 9v (100% duty cycle)
6v - 15v (10% duty cycle)
5v regulated only version available
350mA nominal transmit
35mA receive
Operating temperature
Size
-20οC to +70οC (Storage -30οC to +85οC)
59 x 39 x 15 mm
Spurious radiations
Interface
Compliant with ETSI EN 300 220-2 and EN 301 489-3
user
Power
RF
13pin 0.1" pitch molex
2pin 0.1" pitch molex
3pin 0.1" pitch molex
1.2mm (min.)
Recommended PCB hole size
Intended approval
ETSI Radio standard EN 300 220-2 and EMC standard EN 301 489-3
Transmitter
Output power
+27dBm (500mW) ±1dB (factory adjustable 100 - 500mW)
5 ms nominal (sub 10ms guaranteed)
FM, FSK (F1D, F3D)
TX on switching time
Modulation type
Deviation
3kHz
TX modulation bandwidth
Adjacent channel TX power
Inputs
DC – 3kHz
<-37dBm (<200nW)
analogue, data (CMOS/TTL compatible)
Compliant with ETSI EN 300 220-2 and EN 301 489-3
Spurious radiations
Receiver
Sensitivity
-118dBm for 12 dB SINAD
65dB
>70dB
adjacent channel
image / spurious
blocking
85dB or better
Outputs
RSSI, carrier detect, audio, data
SFX2 timing
TXE low to TX full power
5ms
TXE high to valid data on RXD 5ms
RSSI attack/delay time
Carrier Detect response
<20ms
approx. 20 – 30ms (25ms typical)
Ordering information
Part No.
SFX2-458-5
Variant
5V regulator
Description
VCC=6V-15V
SFX2-458-5-5V
SFX2-458-5-NM
SFX2-458-G
SFX2-458-5-12k5
SFX2-458-5-RI
SFX2-458-5-TI
SFX2-458-5-100mW
Non Regulator
No Mute
GMSK
12.5kHz channel
TR2M compatible
TR2I compatible
VCC=5V externally regulated
No Muting / Squelching of AF output when RF level is below –123dBm
To be used with external 9600 baud GMSK modem
12.5kHz channel spacing Narrow Band
Received Data RXD output Inverted like TR2M
Transmit Data TXD input inverted like TR2I
100mW RF Power Transmit Power reduced to +20dBm (100mW) like TR2I/TR2M
Radiometrix Ltd
SFX2 Data Sheet
page 5
RADIOMETRIX [ RADIOMETRIX LTD ]
