Instruction Manual
Communication Protocol 
11
INSTRUCTION 32 – READ FRONT-PANEL SWITCH DATA 
When sending to machine:- DATA = front-panel switch number; EXTENDED DATA - set as 0. 
When replying:- DATA = front-panel switch number; EXTENDED DATA = front-panel switch value + 128. 
The PC sends this instruction to the machine. The machine replies by sending back a value which relates to that switch.  
INSTRUCTION 33 – WRITE FRONT-PANEL SWITCH DATA 
DATA = front-panel switch number; EXTENDED DATA = front-panel switch value. 
- The PC sends a value directly to the machine. If valid, the machine implements this new value, and replies by sending the 
same data back to the PC. Note that the addressed front-panel switch does not need to be pressed in order to change its value 
via RS-232. 
- If the “+” or “-” button is pressed on the machine, resulting in a change in a switch value, then this switch number and value 
is sent to the PC. 
INSTRUCTION 61 – IDENTIFY MACHINE 
For sending, DATA = 3 to request software version number. EXTENDED DATA - set to 0. 
The PC sends this instruction to the machine. The machine replies as follows: 
-  If the software version is requested, the machine replies with DATA as the version number before the decimal 
point, and  EXTENDED  DATA  is the  value  following  the  decimal  point. For example, for  version 3.4, the  machine replies 
with DATA = 03 (hex), and EXTENDED DATA = 04 (hex). 
FRONT-PANEL SWITCH DATA 
INPUT SWITCH 
The value of the switch data for the INPUT switch is defined as: 
0 = CV 
1 = YC 
2 = YUV 
3 = RGB/S 
4 = SDI (FC-4001 only) 
GENLOCK SWITCH 
The value of the switch data for the GENLOCK switch is defined as: 
1 = Machine is in Genlock mode. 
0 = Machine is not in Genlock mode. 
GENLOCK_STAT SWITCH (inner switch, not on front panel) 
The value of the switch data for the GENLOCK_STAT switch is defined, when GENLOCK is ON, as: 
1 = Machine is Genlocked to input. 
0 = Machine is not Genlocked to input. 
PANEL_LOCK SWITCH 
The value of the switch data for the PANEL_LOCK switch is defined as: 
1 = Machine's front panel is locked. 
0 = Machine's front panel isn't locked. 
FREEZE_SWITCH 
The value of the switch data for the FREEZE switch is defined as: 
1 = Freeze is ON. 
0 = Freeze is OFF. 
Table 9 contains the front-panel switch numbers, as defined for this protocol, and indicates the information which may be read 
(status, data) on each switch: 
Table 9: Front-Panel Switch Numbers 
SWITCH  D4  D3  D2  D1  D0  STATUS  DATA 
Select Input Format
0  0  0  0  0  NO  YES 
Genlock  1  0  1  1  0  YES  NO 
Panel lock  1  0  1  1  1  YES  NO 
Freeze  1  1  0  1  0  YES  NO 
Genlock Stat  1  1  1  0  0  YES  NO 










