Grass Valley 2200 - Manual (Page 53)

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Write Key Transition Rate (CD) Command
Write Key Transition Rate (CD) Command
The Write Key Transition Rate command sets the Key 1 and Key 2 transition rates.
If the execute bit is set, then an auto transition is performed also.
By default, both Key 1 and Key 2 rates are set 1 . However, the command can be
used to set either Key 1 or Key 2 rates independently on switcher models which
support this.
Table 3-17. Write Key Transition Rate Command
Effects Addresses
Valid Effects Addresses for the Write Key Transition Rate commands are:
EFFECTS ADDRESS ASSIGNMENTS
00 PGM-PST Mix System 2
01 Mix/Effects 1 System
02 Mix/Effects 2 System
03 Mix/Effects 3 System
04 Downstream Keyer (DSK)
Writing to Effects Addresses 00 (PGM-PST) and 04 (DSK) have the same effect;
either can be used for this command.
3
Transition Rate
The command speciÞes the Key 1 and Key 2 rate in terms of frames, ranging from
000 to 999. Specify the transition rate in the command by supplying three data
bytes:
¥ HD Ñ The hundreds digit in BCD. The MSB is the ÒexecuteÓ bit.
¥ TN Ñ The tens digit in BCD.
¥ UN Ñ The units digit in BCD. The two MSBs are control bits used to select
only Key 1 or Key 2 rates rather than both.
1. Prior to Version 5.1, only the Key 1 rate was set by default, and it worked only for PGM-PST, not for the
M/Es. The Key 2 rate was not set.
Function
Byte
Count
Effects
Address
Command
Code
Message
Write Key Transition Rate 05 EX CD (Write) HD TN UN
2. Not supported in Version 5.0 and earlier.
3. In Version 5.0 and earlier, writing to address 00 (PGM-PST) was not supported.