Canon BJC 50 Service Manual - Page 51
Canon BJC 50 - Color Inkjet Printer Manual
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BJC-50 2. ASK Interface 1) Interface SHARP Liquid Crystal Pen Computer: Part 2: Product Specifications ZAURUS compatible 2) Optical specifications Light generation Wavelength: 0.85 to 0.90 µm Intensity: 40 to 500 mW/Sr Light angle: ±15° to 30° (along optical axis) Light interception Wavelength: 0.85 to 0.90 µm Intensity: 4 mW/cm2 to 500 mW/cm2 Light angle: Max ± 15° (along optical axis) 3) Transfer speed 9600 bps 4) Communication method Half duplex, start/stop system (unidirectional) 5) Communication distance Approx. less than 30 cm 6) Maximum received data size 512 byte/block 7) Modulation method ASK (Amplitude Shift Keying) Method (carrier: 500 kHz) 8) Received signal "0" Transfer Speed B 5V ASK signal 0V D T Infrared wave length T: 500kHz D: 50% "1" B "0" B Figure 2-16 ASK Method 2-21