RTcom Radio Modems Especificaciones descargar pdf (Pagina 13)

Abacom Technologies •• 67 Hamptonbrook Dr •Etobicoke • ON • M9P 1A2 • Tel: +416 242 3120 • Fax: +416 242 2697

BIM-4xx-F TRANSCEVER MODULE (cont.)

Parameter Min Typ. Max. Units Notes

Base band transfer function

(through a pair of transceivers)

Linear drive (4Vp-p, sine)

AF response @ -3dB 0.1 - 17 Khz -

Analog distortion - 5 10 % -

Digital drive

Data rate (50:50) - - 40 Kbps 4

Time between transmissions 25 - 2000

µS

Average Mark:Space ratio 30 50 70 % 6

Preamble duration (10101010) 3 - - mS -

data delay (TXD to RXD) - 25 -

µS

Interface levels - inputs

TX & RX select V high

V low

Source current @ V low = 0

Vcc-0.5

0.5

Vcc

Volts

TXD V high

V low

Vcc-0.5

Vcc

0.5

Volts

Interface levels - outputs

RXD & CD V high

(no load) V low

Vcc-0.6

0.2

Volts

Notes

1. module on 50mm square ground plane, 16cm whip antenna

2. Standard modulation: 2KHz square wave, 0 to Vcc

3. lKHz, 4V pk to pk. Sinewave centred on +2.5Volts at pin 14 (TXD)

4. Digital drive, 50:50 mark:space (over 4mS) data pattern.

5. High or Low pulse.

6. Averaged over any 4mS period

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 33 34

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RTcom Radio Modems Especificaciones Pagina 13

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