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Wireless module product information, such as a wireless modem - CIRCUIT DESIGN,INC.

Specifications

LMD-401 458 - 462.5MHz

(All ratings at 25 degree C unless otherwise noted)

Common  
Item Specification
Applicable standard FCC Part 90.217
IC RSS-119
Communication form Half-duplex
Emission class F1D
Modulation GFSK
Frequency 458 to 462.5 MHz
Channel spacing 12.5 kHz Channel programmable
Frequency stability +/- 2.5 ppm (-20 to + 60 degree C)
Aging rate +/- 1 ppm / year
Data rate 4,800 bps max
(Pulse width min. 200 us, max 15ms)
Operating temperature range -20 to + 65 degree C
(Storage : -30 to + 75 degree C)
TX / RX switching time 15 ms typ. (DI vs DO)
Supply voltage 3.0 to 5.5 V
Supply current 46 mA (TX), 36 mA (RX) typ.
Dimension 30 X 50 X 9 mm
Weight 25 g
   
Transmitter Part
Transmitter type PLL synthesizer
RF output power 10 mW at 50 ohm (25 degree C)
Deviation 2.4 kHz (PN9, 4800bps)
DI input level L = GND, H = 3 V to Vcc
Residual FM noise 0.12 kHz (DI = L, LPF = 20 kHz)
Spurious emission - 37 dBm (< 1000 MHz, 50 ohms), - 31 dBm ( > 1000 MHz, 50 ohms)
Adjacent channel power - 20 dBm (+/- 12.5 kHz, PN9 4800)
Alternate adjacent CH power - 20 dBm (+/- 25 kHz, PN9 4800)
Occupied bandwidth 8.5 kHz
   
Receiver Part
Receiver type Double superheterodyne
IF 21.7 MHz (1st), 450 kHz (2nd)
Maximum input level 10 dBm
Receiver sensitivity - 116 dBm typ. (12 dB SINAD)
  - 113 dBm typ. (BER 0 error/2556 bits), - 116 dBm typ. (BER 1%)
Co-channel rejection - 7 dB (D/U ratio)
Spurious response rejection - 44 dBm (1st,2nd, 2 signal method)
Adjacent CH selectivity - 50 dBm (+/- 12.5 kHz, 2 signal method)
Adjacent CH saturation - 20 dBm (+/- 12.5 kHz, 2 signal method)
Blocking - 20dBm (±2MHz,±10MHz,±5%, 2 signal method)
DO output level L = GND, H = 2.8 V
RSSI rising time 30 ms (25 kHz shift), 50 ms (at power on)
Time until valid Data-out 50 ms (25 kHz shift), 70 ms (at power on)
Spurious radiation - 60 dBm (1st Lo, 50 ohms)
RSSI out 310 mV at -100 dBm, 240 mV at -110 dBm

Specifications are subject to change without prior notice

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