BM-500 CL / BB-500 CL- 8 -GND+5V15kTTL1kGND100n1k68k 100k1n75Trig inputpin #10SW302.1GND+5V15kTTL1kGND100n1k68k 100k1n75Trig inputpin #10SW302.1GND+5V15kTTL1kGND100n1k68k 100k1n75Trig inputpin #10SW302.1Fig. 5. Trigger input.5.3. Input and output circuitsIn the following schematic diagrams the input and output circuits for video and timing signals areshown.5.3.1. Iris video outputThis signal can be used for lens iris control in Continuous mode.The signal for iris video output is taken from the video signal afterthe gain control. The signal is 0.7 Vpp (without sync) from 75 without termination.5.3.2. Trigger inputAn external trigger input can be applied to pin 10 of 12-pin Hirose connector (when the command TI=1 has beenset). The input is AC coupled. To allow long pulses theinput circuit is designed as a flip-flop circuit. The leadingand trailing edges of the trigger pulse activate the circuit.The trigger polarity can be changed by TP=1.Trigger input level 4 V 2 V.Trigger can also be applied through the Camera Linkconnector, when the command TI=0 has been sent.5.3.3. XEEN outputXEEN is on pin 9 on 12-pin Hirose connector.The output uses either a complementary emitterfollower circuit or open-collector. The output of thecomplementary emitter follower circuit is 3 V. (Notermination)When the open corrector output is used, the maximumcurrent is 120mA. However, if the current is more than50mA, use thicker cable for connecting pins #8 and #9.If the narrower cable is used, it might happen themalfunction due to the resistance of the cable.The output can be selected by switch SW800 locatedinside the camera (rear board).EEN is also found in Camera Link.SW 80012P Pin #9XEEN OUT+5VTTL1002K210K22 75GNDOpen Collector Fig. 6. XEEN outputFig. 4. Iris videoDAC1μ1K2K20.1μ+5VIRIS Video Out