Grass Valley VM 3000 System Controllers v.7.4 - Manual (Page 55)

Introduction
1−17 VM 3000 Installation and Operating Manual
PC 3000 FILE SERVER
Dimensions are typical for a desktop PC. For exact measurements of file server currently supplied with Jupiter systems, please
contact Grass Valley.
CONTROL PANELS FOR CUSTOM MOUNTING
The CP 3000 Switcher Control Panel, MC 3000 Machine Control Panel, CP 3010 expansion panel, and MC 3010 Single 4
Machine Control Panel are available without chassis or power supply (See page 1−23 for part numbers). Each individual panel
measures 80 mm high (exactly) x 200 mm wide (exactly) x 65 mm deep (approx.) or approx. 3.2 x 7.9 x 2.5 inches. The panels
are designed to be fastened along the top and bottom front edges (reference: Grass Valley drawing no. 10−040151−001). The
power supply normally supplied is a 5 volt 3 amp Volgen ES−05003, Grass Valley part no. 06−033098−002. The connector
used for connecting the power supply cable to the panel’s PC board is Grass Valley part no. 30−036841−004.
SYSTEM LIMITATIONS
Maximum Number of Logical Levels
The system−wide maximum number of logical levels is 96§. However, the actual number of levels a VM 3000 can control
in a particular system varies.
The main constraint on the number of levels and outputs a VM 3000 can safely control is the available memory in PMEM,
or backed−up permanent memory. When a VM 3000 starts up, the old status tables are used to generate a completely new
set of status tables. Therefore, no more that half of the total available memory may be used to store switcher status. The VM
3000 has 512 Kb of PMEM available. That means that no more than 262,144 bytes may be used for router status tables.
This formula for router status table PMEM memory usage is based on the worst−case scenario. It assumes that every physical
output on every logical level in the system has its own unique entry in a Switcher Output Table. The formula for each VM
3000 in the system is:
(14 x TL) + (6 x TL x PO) + (10 x PO) + 600 < 262,144
Where: TL = the total number of logical levels controlled by this VM 3000
PO = the total number of physical outputs on ALL levels controlled by this VM 3000
This total must be less than 262,144. For example, in Figure 2−1 a 25−level switcher can have up to 64 outputs per level.
§ Some of the functions described in this section may be extra−cost options. For more information, see page 1−29.