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[ 3 ] Interface Specifications
Optical Interface
Synchronization: Start-stop
Input signals: RD
Output signals: SD
Transmission speed: 115,200 bps max.
Direct-connect Interface
Synchronization: Start-stop
Transmission speed: 115,200 bps max.
Signal level: Conforms to the RS-232C interface
Pin assignment: As shown below.
SD RD
GND
Signal Input/Output
External
device
BHT
1 SG (GND) Ground for signals —
2SDSend data →
3RDReceive data ←
Pin No. Signal Functions
Radio Interface (BHT-7500S only)
Frequency: 2.4 GHz band
Transmission speed: 1.6/0.8 Mbps
Modulation: Spread Spectrum (Frequency Hopping)
Hopping channels: 15
Certificate: FCC Part 15 in USA,
ETSI ETS300 328 and CE EMC-EEC in Europe
Radio Interface (BHT-7500W only)
Frequency: 2.4 GHz baud
Transmission speed: 11/5.5/2/1 Mbps
Modulation: Spread Spectrum (Direct Sequence)
Channels: 13 (ETSI) ?? 14 ??
Certificate: ETSI ETS300 328 and CE EMC-EEC in Europe