Sierra Video 507144-00 - Manual (Page 4)

Digital Mixer User’s Guide 4
F Recall parameters from EEPROM register.
SWB - Switch B expresses the numeric value of the parameter pointed to by Switch A. If Switch A
enters and leaves any mode without Switch B being changed, the parameter value stored in RAM for that
mode will not be influenced by the switch B value. If Switch B is changed, the parameter pointed at by
Switch A will take on the value of Switch B until Switch A is changed to another setting. Here is an
example of how to set the three most significant nibbles of the time delay to zero when Switch B is
initially set to ‘0’:
1) set switch A to position 5,
2) change switch B to any value other than zero,
3) set switch B to zero,
4) set switch A to position 4,
5) change switch B to any value other than zero,
6) set switch B to zero,
7) set switch A to position 3,
8) change switch B to any value other than zero,
9) set switch B to zero.
In other words, to tell the module you want to change a value you must change switch B.
During time delay nibble entries, Switch B’s value expresses a hexadecimal number. This means switch
position A indicates a value of 10, position B, a value of 11, position C, a value of 12, position D, a value
of 13, position E, a value of 14, and position F indicates a value of 15.
Internal Controls
A number of configuration switches and jumpers can be accessed by removing the module from its
chassis. The following describes these controls.
S1 - This is actually a collection of 8 switches contained in a single package. Labels on the package
identify the 8 individual switches within the package. The ‘1’ and ‘0’ references in the
descriptions below correspond with those on the module silk screen next to the switch.
Individual switches function as follows.
S1-1,S1-2 - These switches control the transition time from one input to the other or from
either input to or from ‘black’. The transition times resulting from each switch setting are:
Table 3: GPI Transition Period Selection
Transition Switch
Period Settings
½ secondS1-1=1,S1-2=1