RAD Data comm LRS-24 - Manual (Page 39)

LRS-24 Installation and Operation Manual Chapter 2 Installation and Setup
Installation and Setup 2-11
Table 2-3. Module CM-1 Jumper Settings
Jumpers Description Values
JP4, JP5, JP6,
JP9, JP10, Select the station clock interface in the
STATION CLK connector of the
LRSI-F-CM1 interface module.
T1 interface (1544 kHz clock): Set jumper JP5 in
the T1-DSU position and jumpers JP9 and JP10 to
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
station clock interface in the STATION
CLK connector of the LRSI-F-CM1
interface module.
AMI—AMI line code : Use this selection for the T1
interface.
HDB3—HDB3 line code
: Use this selection for the
E1 interfaces.
Default setting: HDB3
RLOOP, JP12 Controls the operating mode of the
station clock interface in the STATION
CLK connector of the LRSI-F-CM1
interface module.
ON : The station clock interface returns the
regenerated clock signal toward the clock source.
OFF
: The station clock interface does not return
clock signal toward the clock source.
Unless your system has special requirements,
always set the jumper JP12 to ON.
Default setting: JP12 ON
STATCLK,
JP14
Selects the levels of the clock signal
provided by the CM-1 module as a
station clock signal for the user modules
installed in LRS-24.
SYS : Clock signal at G.703 levels regenerated from
the STATION CLK connector.
TTL
: Clock signal at TTL levels, provided by a
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
receiver which provides a clock signal at
TTL levels when the jumper JP14 is set
to TTL.
EN : Line receiver enabled. Always select this
position when the jumper JP14 is set to TTL.
DIS
: Line receiver disabled. Always select this
position when the jumper JP14 is set to SYS.
Default setting: DIS
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