Grass Valley VM 3000 System Controllers v.7.4 - Manual (Page 245)

Configurator Switcher Description Table
5−35 VM 3000 Installation and Operating Manual
b. Apex digital audio routers are usually factory set to operate in “two−level stereo” mode, which permits special
stereo mode switching such as mix and reverse. The left level is normally set on the rear panel as level 32. The
Right stereo channel is automatically given the same number plus 4. This setting requires configuration of two
physical levels, typically Level 32 and Level 36. For more information about these hardware settings, refer to the
Apex manual.
c. For Venus switchers, the backplane level select jumpers are usually factory set as follows:
Name of level Physical level no. Notes
Analog video 1
Serial digital video (standard definition) 7
Serial digital video (high definition) 9
Analog audio left (A1) 2
Analog audio right (A2) 6
Analog audio A3 8
Analog audio A4 12
AES digital audio 32 Applies to all versions and modes of digital
audio switchers.
AES digital audio (right) 36 Applies only to right channel of ES 401
digital audio switchers operated in two−level
stereo mode.
Time code (mono) 3
Data transmit 16
Data receive 16
Data (reserved) 20
These level numbers should be confirmed by checking the documentation package supplied with the switcher.
Analog audio stereo level numbers: Selection of mono/stereo mode is determined by a backplane
jumper. With this jumper in the Stereo position, the physical level number set by the Level jumper is
automatically applied to the Left stereo channel (in this example, Left audio would be physical level
“2.”); and, the Right stereo channel is automatically given the same number plus 4 (in this example
Right audio would be physical level “6”). Furthermore, stereo operation places restrictions on the
physical level numbers that can be used; specifically, the “L4” level jumper cannot be installed. For
more information, please refer to the “Backplane Jumpers” section of the Venus Installation Manual.
ES 401 digital audio switcher level numbers: Selection of one− or two−level mode is determined by
hardware jumpers and switches: (1) If the “Mono” backplane jumper is On, the ES 401 will operate as a
one−level mono 64 x 64. (2) With this jumper off, dip switch settings on the Matrix and Output boards
will determine whether the switcher is operated as one−level stereo or two−level stereo.
The default setting is Mono jumper OFF, two−level stereo, which permits special stereo mode switch-
ing such as mix and reverse. This setting requires configuration of two levels, such as Level 32 and Lev-
el 36 as shown above. Again, the right channel always has the number of the left channel plus 4. For
more information about these hardware settings, refer to the Venus manual.