NEC 2000 IVS manual Balanced transmission

PN-30DTC/30DTC-A (DTI)

Switch Settings

	SWITCH	SWITCH	SETTING	FUNCTION		CHECK
	NAME	NUMBER	POSITION
JPS				Balanced transmission
(Jumper pin)			UP
				(For twisted-pair cable)
			DOWN	TA is grounded on the transmission line
				(For coaxial cable)	Note 4
JPR				Balanced transmission
(Jumper pin)			UP
				(For twisted-pair cable)
			DOWN	RA is grounded on the transmission line
				(For coaxial cable)
JP				Line impedance: 75 ohms
(Jumper pin)			RIGHT
				(For coaxial cable)	Note 4
			LEFT	Line impedance: 120 ohms
				(For twisted-pair cable)

The figure in the SWITCH NAME column and the position in in the SETTING POSITION col- umn indicate the standard setting of the switch. When the switch is not set as shown by the figure and , the setting of the switch varies with the system concerned.

Note 1: Set the groove on the switch knob to the intended switch position.

Note 2: When the power is on, set the MB switch to ON (UP position) before plugging/unplugging the circuit card.

CHAPTER 4	ND-45504 (E)
Page 78-4	Addendum-001
Revision 2.1	JULY, 1998