Hitachi Kokusai Electric KP-F520WCL Operation Manual page 37

Communication Timing
Example: In case that transmitting the data for changing Gain (changing to 10dB from 0dB)
Vertical sync signal
(Internal VD)
Communication
Internal setting
Trigger input
Exposure time
Internal processing
period
Image output
① Send a command of gain 10dB.
② After the command is received (last ACK after receiving), and performs the camera internal processing, such as the
vertical synchronization signal reset.
③ After the camera internal processing, outputs a vertical sync signal, and change immediately the gain setting to 10dB.
Communication processing period = (communication period + internal processing period)
* Communication period is depending on communication method.
④ Input the trigger signal, and start exposure.
* The trigger signal can be input after the total communication period.
⑤ Output the image which is Gain 10dB.
<Use conditions>
a) Camera operation mode: Fixed shutter mode
b) Communication control items: Gain, Partial scan (START, WIDTH), Shutter speed and Trigger source only
* Communication control is not performed during the exposure period or image transfer period.
①
Communication period
Command (Gain 10dB)
Is sent
ENQ
Gain 0dB
Image (Gain 0dB)
Total Communication period
= (Communication period + internal processing period)
③
Data
ACK ACK
③
④
②
Processing period :1ms
Gain 10dB
⑤
Image (Gain 10dB)
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