Grass Valley PDR100 - Manual (Page 35)

PDR100 Rear Panel Connections
PDR100 Installation 3-11
PDR100 Rear Panel Connections
There are a number of rear-panel connections that must be made to use the PDR100.
Each connector on the rear panel will be discussed with any required terminations.
Figure 3-12 shows the connections required from the four circuit boards mounted in
slots 14 through 17. Slot 17 has the RS-422 Interface circuit board. Slot 16 contains
the Reference Genlock circuit board. Slot 15 is reserved for the Slave Disk Recorder
circuit board. Slot 14 has the Master Disk Recorder circuit board. Boards must be in
the assigned slots for the PDR100 to operate correctly.
The SCSI interface(s) in the PDR100 Video Disk Recorder must be terminated on the
PDR100 rear panel to operate correctly. If a PDX103 is used, the SCSI interface is
terminated at the SCSI connectors on the expansion unit. (See “Extending the SCSI
Bus” on page 3-17.) One terminator is supplied with the PDR100 as a standard
accessory if just a Master Disk Recorder circuit board is installed; two terminators are
supplied if there is also a Slave Disk Recorder circuit board installed.
Figure 3-12. Connections and Terminations for Slots 14 - 17
Connecting the Reference Genlock
The Reference Genlock circuit board is in slot 16. It has two BNC connectors that
form a bridging high impedance loop-through for the house reference signal. The
reference signal is used to synchronize the 27 MHz video clock and to provide the
field reference. The bridging loop-through connection is compensated for a 75
Ω
line,
which means that the line must be terminated, at some point, in its characteristic
impedance to operate correctly. See Figure 3-12.
9040-11
House Reference (Black Burst)
75
Ω
End-Line Termination
SCSI Termination
Longitudinal Time Code Cable
RS-422 Cable to RS-422
Connector Panel