5.3 ATTACHING THE VIDEO OUTPUT
Most users utilize the BNC connector on the "CN" and
"EX" versions for video output from the camera.
Connect the output from the camera to the input of
your monitor, VCR, or switching device. The input of
the monitor should be balanced for 75
Ω
termination.
Standard RG-59 type coaxial cable should carry a full
video signal for up to 500 feet.
5.4 LENSES
C-mount lenses are attached to the camera by careful-
ly engaging the threads and rotating the lens
clockwise until it firmly seats on the mounting ring. Do
not force the lens if it does not seat properly. Some
lenses with extremely long flangebacks may exceed
the mounting depth of the camera. The TM-7 series
cameras use 1/2" format lenses.
5.4.1 BACK FOCUSING LENSES
To backfocus the TM-7CN, TM-7EX cameras, first
attach a C-mount lens in the mount. Be certain that the
lens is properly seated. Next set the lens focus to infini-
ty (and if the lens is a manual iris, set the iris to a high f
number while still retaining a well illuminated image).
Try to obtain the best focus at this setting. Then loosen
the two miniature hex head set screws locking the
focus ring in place. Now turn the entire lens and focus
ring assembly back and forth until the best image is
obtained. This will set your backfocus. Once the best
image is obtained, tighten the focus ring set screws.
5.4.2 AUTO-IRIS LENS SETUP
Power down the camera before attaching auto-iris
lens. Mount the auto-iris lens following the instructions
above. Plug the connector provided on the lens into
the connector on the rear of the camera marked
AUTO-IRIS or simply LENS. You may now power up
the camera. Point camera at a light area and then
quickly towards a darker area. If everything is working
properly, the iris should adjust for the light change.
NOTE: There is a small chance that damage could
occur to the auto-iris lens by plugging or unplugging
the lens into the LENS connector on the camera while
the camera is still powered up. It is a good idea to
always remove power from the camera before con-
necting or disconnecting the lens.
5.5 SHUTTER CONTROL SETUP
The SC-745 Shutter Controller is used to externally
vary the shutter speed of the TM-7CN/6CN and TM-
7EX/6EX. This controller plugs into the 6-pin connec-
tor on the rear of the camera normally used for auto-
iris lenses. Switching the controller will obtain the
desired shutter speed. See the key to controller
speeds on the associated data sheet for the camera
being shuttered. The SC-745 must remain attached to
the camera to use the shutter feature of the camera
unless the camera is specially modified to shutter
internally. If at a single speed it is desired to use an
auto-iris lens and SC-745 at the same time, a special
6-pin connector must be made up which breaks out
the SC-745 and lens connections as separate outputs.
See Section 6 for pin-outs and speed menu.
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