Pulnix TM-6CN, Руководство по эксплуатации

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SECTION 6 SHUTTER OPERATION
The TM-7/TM-6 series has a substrate drain type shut-
ter mechanism which provides a superb picture at vari-
ous speeds without smearing.
6.1 BCD SHUTTER CONTROL
By selecting D0, D1, D2 level high or low, the following
shutter speeds are obtained, PULNiX provides a shut-
ter control (SC-745), but it is also easily controlled from
a computer, remote control unit, or fixed at a specific
speed.
6.2 SUBSTRATE DRAIN SHUTTER MECHANISM
Normal operation requires the CCD chip to construct
an individual potential well at each image cell. These
potential wells are separated from each other by a bar-
rier. The barrier is sequentially removed to transfer the
charge from one CCD to another by the pixel clock.
This is the basic principle of CCD operation for interline
transfer. The substrate drain vertically moves the
charges. When excess potential is applied to the sub-
strate underneath each cell, a potential barrier is pulled
down to release the charge into the drain. This can
happen to all the cells simultaneously, whereas normal
CCD shuttering is done with a horizontal charge shift to
the drain area by interline transferring or reverse trans-
ferring of the frame transfer chip. The discharge of the
TM-7/TM-6 chip is done in the horizontal blanking inter-
val.
Note: Vertical resolution of shutter mode is one field
(244). Full frame shutter is not available. If the object
is motionless, the interlace signal (2 fields) can gener-
ate full vertical resolution.
6.3 SYNC OUTPUT AND CLOCK OUTPUT
TTL level internal sync and buffered pixel clock output
(14.31818MHz) are available from TM-7 series cam-
eras.
The signal is an emitter follower output and it requires
a termination resistor at end of cable.
The suggested value is from 75
Ω
to 330
Ω
. This is
especially important for the TM-7 / TM-6 because of
the cable.
9
1
3
5
6
2
4
6 pin connector
1. D
2
4. +12V
2.GND 5. D
0
3. Iris 6. D
1
VD
Transfer
gate
HD
Shutter
control
H
Vsub pulse
Shutter exposure time
Discharge to sub-
strate
Control Setting 0 1 2 3 4 5 6 7
(sec) 1/60 1/125 1/250 1/500 1/1000 1/2000 1/4000 1/10000
D0 L H L H L H L H
D1 L L H H L L H H
D2 L L L L H H H H