SW-D7000U, 9CH. COLOR VIDEO MULTIPLEXER
74 JVC PROFESSIONAL, IMAGING PRODUCTS
Playback Format
S-VHS OR COMPOSITE VCR
S-VHS and Composite video output’s are available. Select type your VCR type here.
SWITCH INPUT ON/OFF
Most time lapse VCRs provide a hard-wired pulse output to devices such as the multiplexer,
indicating that the VCR has just completed recording of one field of the current camera. This lets the
multiplexer know that it can switch to a new camera input. This feature simplifies the programmer's
installation since it automatically takes care of synchronizing the normal and alarm record speeds of
the
SW-D7000U
with those of the time lapse VCR. No VCR speeds then need to be set up in the
SW-D7000U
menus, only on the VCR itself.
This feature can be disabled or enabled in the program menus via the SWITCH INPUT ON/OFF
selection in the VCR SETUP sub-menu. The factory default setting is ON, which allows the auto-
detection circuit to operate. This is the recommended setting.
NOTE:
On power up, the auto-detection circuit will wait about 15 seconds to check if the VCR
starts to output a switch pulse. The period of 15 seconds is approximately the period
between switch pulses when the VCR is running in 960-hour mode. During this brief
time the multiplexer will not switch cameras at all unless a switch pulse is detected. If
the switch pulse ceases, the multiplexer will also take about 15 seconds to determine
that it has in fact stopped and not just changed to 960-hour mode.
Indicator:
An on-screen '
R EXT
' indicator replaces the record speed indicator while this switch input is active
and detected by the
SW-D7000U
.
SWITCH EDGE
You can select a Negative Edge or Positive Edge for the pulse edge used for the Switch/VEXT input.
CAUTION:
Do not change this setting without first consulting Customer Support.
SIGNAL LEVEL
There are different signal levels from different types of time lapse VCRs. The multiplexer is designed
to operate with all commonly available time lapse VCRs (type B). There are some less common
VCRs (type A, type C) which have different signal levels. The multiplexer has a menu switch to
change between VCR types in the VCR Set-up sub-menu.
CAUTION:
Do not change this setting without first consulting Customer Support.
PLAYBACK FORMAT
The
SW-D7000U
can decode tapes recorded on other multiplexers. If a tape from a Dedicated
Micros, Robot or Calibur compatible multiplexer is to be Played back, the proper format must first be
selected from the
SW-D7000U
menus. This setting is in the PLAYBACK FORMAT sub-menu.
NOTE:
If an alternate decoding is selected,
SW-D7000U
tapes will not be correctly decoded,
and vice-versa.
