RAD Data comm LRS-24 User 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.

: 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.

: 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

Order from: Cutter Networks

Ph:727-398-5252/Fax:727-397-9610