ADCP-61-743 Issue 3 September 2004

Table 3. RTAU Configuration Fields, continued

FIELD

TYPE

OPTIONS

DESCRIPTION

DEFAULT

EQUIPMENT SETUP FIELDS, continued

 

 

 

 

 

 

 

Mode, continued

 

SPLTEL

SPLTEL indicates a split in both the A and B paths

 

 

 

 

and connects an SPD to the line incoming from the

 

 

 

 

E direction and a TSG to the line outgoing in the E

 

 

 

 

direction similar to SPLTE mode. The signal in the

 

 

 

 

F direction is looped back.

 

 

 

 

 

 

 

Toggle

SPLTFL

SPLTFL indicates a split in both the A and B paths

 

 

 

 

and 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.

 

 

 

 

 

 

SIGNAL GENERATOR SETUP FIELDS

 

 

 

 

 

 

 

Pattern Type

Toggle

 

OVERVIEW: If the desired pattern type is not

QRS

 

 

 

available, 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. Quasi-random Signal (QRS) is a signal

 

 

 

 

repeated every 1 to 24 bits as specified by the

 

 

 

 

Operation System (OS) application. QRS must

 

 

 

 

conform to the description in Bellcore TR-NPL-

 

 

 

 

000054.

 

 

 

 

 

 

 

 

 

 

(continued)

Page 18

2004, ADC Telecommunications, Inc.

Page 18
Image 18
ADC P-61-743 user manual Spltel, Spltfl, Loope, Loopf, Qrs

P-61-743 specifications

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