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. LX-192U/LX-194U or ES-192U/ES-194U must be ordered if this option is required. Serial output is supplied at no charge.
ESE	ESE Time Code Output: An ESE Time Code output (TC90) is provided allowing the unit to drive ESE Time Code Slaves. LX-192U/LX-194U or ES-192U/ES-194U must be ordered if this option is required. Serial output is supplied at no charge.
J	220 VAC/50 Hz Operation: The unit is configured to operate from 220 VAC line voltage. 117 VAC 50/60 Hz is standard.
P	19" Front Panel (Rack Mount): Designed for mounting into a standard equipment rack. Panel is 1/8" clear or black anodized Aluminum and chassis is 5" - 10" deep. ES-192UP/ES-194UP must be ordered if this option is required. Serial output is supplied at no charge.
P2	Dual Rack Mount: Allows specific units to be mounted side-by-side on a single Rack Mount panel. ES-192U/ES-194U must be ordered if this option is required. Serial output is supplied at no charge.
Q	Console Mount: The unit is housed in an enclosure 8" deep, front panel is 3.5" x 9", 1/8" clear anodized aluminum.
R	Remote Input: Rear-mounted connector for Remote Control. LX-192U/LX-194U or ES-192U/194U must be ordered if this option is required. Serial output is supplied at no charge.
S	Parallel BCD Slave: Parallel BCD Slave for use with old style BCD Outputs.
UL	"UL" Approved Power Supply: The unit is supplied with a UL/CSA approved wall mount power supply.