Black	Black Anodized Front Panel.
C	Crystal Time Base: A crystal reference is employed for those applications requiring independence from the line frequency. A trimming function is included for greater accuracy (2-3 seconds/week).
D	Remote Control: This option consists of a connector wired to switches on a control plate via a six-foot cable. Extra cable available.
DC	DC Operation: Requires the unit to be powered from a DC source exclusively, typically +12 to +35 VDC.
J	220 VAC/50 Hz Operation: The unit is configured to operate from 220 VAC line voltage. 117 VAC 50/60 Hz is standard.
L2	Two Additional Video Input/Output Sets: Available on most Video Inserters.
L4	Four Additional Video Input/Output Sets: Available on most Video Inserters.
P2	Dual Rack Mount: Allows specific units to be mounted side-by-side on a single Rack Mount panel.
R	Remote Input: Rear-mounted connector for Remote Control.
SV	The BNC video connectors are replaced with S-VHS connectors.
UL	"UL" Approved Power Supply: The unit is supplied with a UL/CSA approved wall mount power supply.