External Trigger Shutter - Sony XC-HR90 Manual

Normal Shutter
This mode provides continuous video output with the electronic
shutter selected by switches to capture a high-speed moving
object clearly.
Normal
Shutter
8
* "Other modes" refers to restart/reset mode and external trigger shutter mode.
• Normal shutter speed settings
30fps
1/125 1/250 1/500
1 1 1
2 2 2
3 3 3
4 4 4
1/2000 1/4000 1/10000
1 1 1
2 2 2
3 3 3
4 4 4
1/50000 1/100000 1/100
1 1 1
2 2 2
3 3 3
4 4 4
15fps
1/125 1/250 1/500
1 1 1
2 2 2
3 3 3
4 4 4
1/2000 1/4000 1/10000
1 1 1
2 2 2
3 3 3
4 4 4
1/50000 1/100
1 1
2 2
3 3
4 4

External Trigger Shutter

Inputting an external trigger pulse enables the camera to capture
fast-moving objects clearly with precise timing.
Set DIP switches 6, 7, and 8 on the rear panel to Mode 1 or Mode 2.
When you set the trigger pulse width to 1/3 of a second or more, the
output signal changes to the normal VIDEO signal.
Mode 2
Mode 1
6 6
Note
7 7
8 8
High-rate scan mode cannot be used while
in external trigger shutter mode 2.
There are two modes for the timing in which video signals are obtained.
• Mode 1 (Non-reset mode)
In this mode, a video signal synchronized with a VD signal is
output after a trigger pulse is input.
– The video signal is synchronized with the external VD signal
when an external HD*/VD signal is input.
– The video signal is synchronized with an internal VD signal when
no external HD*/VD signal is input.
* External or internal synchronization is selected automatically depending on the
presence or absence of external HD input.
• Mode 2 (Reset mode)
In this mode, an internal VD is reset, then a video signal is output
a certain period of time after trigger pulse input.
Other
modes*
8
The shutter will be off when the DIP
swich is set as below.
1/1000 OFF OFF
1 1 1
2 2 2
3 3 3
4 4 4
1/20000 OFF OFF
1 1 1
2 2 2
3 3 3
4 4 4
OFF
1
2
3
4
The shutter will be off when the DIP
swich is set as below.
1/1000 OFF OFF
1 1 1
2 2 2
3 3 3
4 4 4
1/25000 OFF OFF
1 1 1
2 2 2
3 3 3
4 4 4
OFF OFF
1 1
2 2
3 3
4 4
(Unit: seconds)
To Set the External Trigger Shutter
There are two ways to set the shutter speed.
• Using trigger pulse width
Set all DIP switches (1 to 4 on the rear panel) to OFF.
You can obtain an arbitrary shutter speed by setting the trigger
pulse width to the range of 2 μ sec to 250 msec.
Exposure time = Trigger pulse width + 5 μ sec
Mode 1
(Non-reset mode)
1
2
3
4
Note
An incorrect video signal will be output if you input a new trigger
pulse before the video signal output for the previous trigger pulse
is output completely.
• Using the DIP switches on the rear panel
For shutter speeds, see the following table.
Mode 1 (Non-reset mode)/Mode 2 (Reset mode)
1/125 1/250
1 1
2 2
3 3
4 4
1/2000 1/4000
1 1
2 2
3 3
4 4
1/50000 1/100000
1 1
2 2
3 3
4 4
Restart/Reset
To Set Restart/Reset Mode
The information on one screen can be extracted at any time by
externally inputting restart/reset signals (HD/VD). To enter this mode,
set the trigger shutter switches (6 to 8) on the rear panel of the
camera as shown in the fi gure below.
To use restart/reset mode and Partial scan mode simultaneously, set
the Partial scan mode switch (5) to ON (right side).
Restart reset
R/R
6
7
8
Long Exposure
The Restart/Reset function extends the CCD accumulation time,
resulting in highly sensitive image capture. This function is effective
when you cannot gain satisfactory sensitivity under normal operating
conditions, or when you want to observe the trail of a moving object.
Extend the VD interval (T) between external VD pulses.
Example of input timing chart
EXT-HD
EXT-VD
Charge
accumulation
on CCD
VIDEO OUT
Mode 2
(Reset mode)
1
2
3
4
1/500 1/1000
1 1
2 2
3 3
4 4
1/10000 1/25000
1 1
2 2
3 3
4 4
1/100
1
2
3
4
(Unit: seconds)
Partial scan
OFF ON
5 5
T
XC-HR90 49