9
4.3 Asynchronous Capture in Field Mode (Shutter position at 0)
Set NRM/ASM switch to ASM position and FLD/FRM switch to FLD position.
4.4 Asynchronous Capture in Frame Mode (Shutter position at 0)
Set NRM/ASM switch to ASM position and FLD/FRM switch to FRM mode.
4.5 External Synchronization and Gen-lock
The UM-300/UM-301 camera automatically locks to the external sync source. The external sync source must
match the camera HD and VD specification, which are 15.734KHz and 59.94Hz respectively. Both external HD
and VD are TTL level signals.
a) HD
H:
2.5V to 5V
L:
0V or GND
Pulse width:
5-50% duty cycle, see figure 10 shown below.
b) VD
H:
2.5V to 5V
L:
0V or GND
Pulse width:
0.5-50% duty cycle; must be RS-170 format (odd and even fields).
Figure 11. External Synchronization and Gen-lock Timing
