ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

DLP-570

Page 8 of 18

Table 570-1. RTAU Configuration Fields, continued

FIELD

TYPE

OPTIONS

DESCRIPTION

DEFAULT

EQUIPMENT SETUP FIELDS, continued

 

 

Mode,

Toggle

SPLTFL

SPLTFL indicates a split in both the A and B paths and

 

continued

 

 

connects an SPD to the line incoming from the F direction

 

 

 

 

and a TSG to the line outgoing in the F direction similar to

 

 

 

 

SPLTF mode. The signal in the E direction is looped back.

 

 

 

 

 

 

 

 

LOOPE

The LOOPE mode is a full split of both A and B

 

 

 

 

transmissions paths. The incoming line in the E direction is

 

 

 

 

connected to the SPD and this line is connected to the

 

 

 

 

outgoing line in the E direction. The circuit will be looped in

 

 

 

 

one direction. The outgoing line in the F direction (non-test

 

 

 

 

direction) will be connected to a QRSS source and the line

 

 

 

 

incoming from the F direction is terminated by the nominal

 

 

 

 

characteristic impedance of the line.

 

 

 

 

 

 

 

 

LOOPF

The LOOPF mode is a full split of both A and B

 

 

 

 

transmissions paths. The incoming line in the F direction is

 

 

 

 

connected to the SPD and this line is connected to the

 

 

 

 

outgoing line in the F direction. The circuit will be looped in

 

 

 

 

one direction. The outgoing line in the E direction (non-test

 

 

 

 

direction) will be connected to a QRSS source and the line

 

 

 

 

incoming from the E direction is terminated by the nominal

 

 

 

 

characteristic impedance of the line.

 

 

 

 

 

 

 

 

DISABLE

When DISABLE is selected, no monitor or split access can

 

 

 

 

take place. Setting the Mode field to DISABLE also stops

 

 

 

 

any measurement in progress, as if the Measurement field

 

 

 

 

(described below) had been set to STOP.

 

 

 

 

 

 

SIGNAL GENERATOR SETUP FIELDS

 

 

Pattern Type

Toggle

 

OVERVIEW: If the desired pattern type is not available,

QRS

 

 

 

select the User Code option to enter a pattern 32 bits or less.

 

 

 

 

 

 

 

 

QRS

Quasi-Random Signal. QRS (220-1) is a 1,048,575-bit

 

 

 

 

sequence generated by a 20-stage shift register with feedback

 

 

 

 

taken from the 17th and 20th stages. The non-inverted output

 

 

 

 

is taken from the 20th stage, and an output bit is forced to be

 

 

 

 

a ‘1’ whenever the next 14 bits are all 0’s. QRS is typically

 

 

 

 

used to verify continuity and to check circuit performance in

 

 

 

 

the presence of traffic-like signals. QRS (Quasi-random

 

 

 

 

Signal) is a signal repeated every 1 to 24 bits as specified by

 

 

 

 

the OS (Operation System) application. QRS must conform

 

 

 

 

to the description in Bellcore TR-NPL-000054.

 

 

 

 

 

 

(continued)

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© 2000, ADC Telecommunications, Inc.