Filter
Top Products
ADCP-61-743 • Issue 3 • September 2004
Page 18
2004, ADC Telecommunications, Inc.
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
available, select the User Code option to enter a
pattern 32 bits or less.
QRS
QRS Quasi-Random Signal. QRS (2
20
-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)