Field-On-Demand Function; Field-On-Demand Function Table; One Trigger Mode - Hitachi KP-F1 Technical Operation Manual

14. Field on demand function
Field on demand refers to a function for picking up rapidly moving objects by applying a trigger
pulse input at a desired timing to provide a desired or a fixed exposure time. The function is
effective since the object is always taken at the same position in the picture. The camera is
provided with four modes. Simultaneous odd and even field output and frame output can be
produced for each of these modes. However, one image output is obtained per trigger. This
function is unavailable in the 2N mode.
Trigger Camera Switch
Mode Setting
One SW1: ON
Trigger SW2: 11110000
SW3: OFF
Two SW1: ON
Trigger SW2: 11011000
SW3: OFF
Fixed SW1: ON
Shutter SW2: 00000000
SW3: OFF
Sync SW1: OFF
Non- SW2: 01000010
Reset SW3: ON
(*1) Output Signal is 0 Volts DC
(*2) Output Signal has composite sync and black pedestal
(*3) Output Signal is not synchronized with external sync
Example of DIP switch, SW2 setting:
SW2: 01000010

One trigger mode

At a single trigger pulse input (Trig-A), exposure starts at the pulse rising edge and ends at the pulse
falling edge. The vertical sync is reset and the video output is obtained immediately.
The pulse width equals the exposure time.

Field-on-Demand Function Table

Signal
Setting Output Signal
2I OK: VS signal
2N NG: No signal (*1) 1/60s
1N OK: VS signal
2I OK: VS signal
2N NG: No signal (*1) 1/60s
1N OK: VS signal
2I OK: V signal
2N NG: VS signal (*2) 1/60s
1N OK: V signal
2I OK: VS signal
2N NG: VS signal (*3) 1/60s
1N OK: VS signal
Video 1
1/60s OK: VS signal
NG: No signal (*1) 1/60s
1/30s NG: S signal
1/60s OK: VS signal
NG: No signal (*1) 1/60s
1/30s NG: S signal
1/60s OK: V signal
NG: VS signal (*2) 1/60s
1/30s NG: No signal
1/60s OK: VS signal
NG: VS signal (*3) 1/60s
1/30s NG: S signal
Video 2
Output Signal
1/60s
1/30s
1/60s
1/30s
1/60s
1/30s
1/60s
1/30s
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