RAD Data comm LRS-24 operation manual Module CM-1 Jumper Settings

LRS-24Installation and Operation ManualChapter 2 Installation and Setup

Table 2-3. Module CM-1 Jumper Settings

Jumpers	Description	Values
JP4, JP5, JP6,	Select the station clock interface in the	T1 interface (1544 kHz clock): Set jumper JP5 in
JP9, JP10,	STATION CLK connector of the	the T1-DSU position and jumpers JP9 and JP10 to
	LRSI-F-CM1 interface module.	BAL.
		Balanced E1 interface (2048 kHz clock): Set
		jumper JP4 in the E1-BAL position, and jumpers JP9
		and JP10 to BAL.
		Unbalanced E1 interface (2048 kHz clock): Set
		jumper JP6 in the E1-UBAL position, and jumpers
		JP9 and JP10 to UBAL.
		Default setting: Balanced E1 interface
LCODE, JP11	Selects the line code accepted by the	AMI—AMI line code: Use this selection for the T1
	station clock interface in the STATION	interface.
	CLK connector of the LRSI-F-CM1	HDB3—HDB3 line code: Use this selection for the
	interface module.
		E1 interfaces.
		Default setting: HDB3
RLOOP, JP12	Controls the operating mode of the	ON: The station clock interface returns the
	station clock interface in the STATION	regenerated clock signal toward the clock source.
	CLK connector of the LRSI-F-CM1	OFF: The station clock interface does not return
	interface module.
		clock signal toward the clock source.
		Unless your system has special requirements,
		always set the jumper JP12 to ON.
		Default setting: JP12 ON
STATCLK,	Selects the levels of the clock signal	SYS: Clock signal at G.703 levels regenerated from
JP14	provided by the CM-1 module as a	the STATION CLK connector.
	station clock signal for the user modules	TTL: Clock signal at TTL levels, provided by a
	installed in LRS-24.
		dedicated line receiver.
		Select the position best suited to the requirements
		of the user modules installed in LRS-24: for
		HTU-E1C module, always set the jumper JP14 to
		SYS and the jumper JP15 to DIS.
		Default setting: SYS
RCEN, JP15	Connects the supply voltage to the line	EN: Line receiver enabled. Always select this
	receiver which provides a clock signal at	position when the jumper JP14 is set to TTL.
	TTL levels when the jumper JP14 is set	DIS: Line receiver disabled. Always select this
	to TTL.
		position when the jumper JP14 is set to SYS.
		Default setting: DIS

Installation and Setup 2-11

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