Atec Acterna-JDSU-ANT-20SE - Manual (Page 6)

Delay measurement
Delay measurements are used for aligning satellite hops and testing the
maximum permitted delay times for storage exchange and cross-con-
nect systems and for checking the loop circuits in regenerators.
The ANT-20SE measures the time taken to transmit the test pattern
from the generator through the section under test and back to the
receiver. The measurement is made on the test patterns in a selected
channel, or in the tributaries (SONET; bulk signal or asynchronous),
or on the selected channel of the lowest hierarchy level of asynchronous
multiplex systems.
To avoid ambiguities in the measurement, two measurement times are
provided.
Measurement range
Bit rates from 34 to 155 Mbit/s . . . . . . . . . . . . . . . . . . . . . . . . 1 ms to 1 s
Bit rate 1.5 Mbit/s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ms to 5 s
Alarm detection
All alarms are evaluated and displayed in parallel
Alarm types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LOS, OOF, LOF
Additionally, for STS . . . . . . . . . . . . . . . . . AIS-L, RDI-L, AIS-P, LOP-P,
NDF-P, RDI-P, UNEQ-P, TIM-P, PLM-P
Additionally, for DS1, DS3 . . . . . . . . . . . . . . LSS, AIS, RAI (YELLOW),
IDLE (DS3), FEAC (DS3)
TOH and POH evaluation
± Display of complete TOH and POH, e.g. interpretation of
APS information in K1 and K2
For the bytes E1, E2, F1, F2 and byte groups D1 to D3 and D4 to D12:
± BERT using test pattern from the generator unit
± Output of the data signal via the V.11 interface (also for K1, K2,
K3, N1 and N2)
For the Trace Identifier
± J0 . . . . . . . . . . . . . . . . . . . . . . display of 16 byte ASCII sequence
± J1, J2 . . . . . . . . . . . . . . . . display of 16 or 64 byte ASCII sequence
Measurement interval
Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 second to 99 days
Measurement start . . . . . . . . . . . . . . . . . . . . manual or automatic timer
(user setting)
Measurement stop . . . . . . . . . . . . . . . . . . . . manual or automatic timer
(user setting)
Memory for errors, pointer operations and alarms
Resolution of error events and pointers . . . . . . . . . . . . . . . . . . . . . . . 1 s
Alarm resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 ms
Off-line analysis software
The software runs on standard PCs and permits comprehensive
analysis of stored ANT-20SE results. After loading the results, the
ANT-20SE settings during the measurement and the stored results can
be accessed. Zoom and filter functions allow detailed evaluations. The
processed results can be exported in CSV format for importing into
other programs such as MS Excel or MS Word for Windows for
producing documentation.
Results display and instrument operation
Numerical display
Display of absolute and relative values for all error types
Intermediate results . . . . . . . . . . . . . . . . . . . . . . . . . . every 1 s to 99 min
Graphical display (histogram) (Figure 5)
Display of errors, pointer operations / values and alarms as bargraphs
vs. time
Units, time axis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . seconds, minutes,
15 minutes, hours, days
Tabular display
Display of all alarm and error events with time stamp
Result printout
ANT-20SE supports a variety of dot-matrix, inkjet and laser printers
(Windows Print Manager)
Printer interfaces
Serial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V.24/RS232
Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . Centronics/EPP/IEEE P 1284
Result export
Results are stored in a database and can be processed using standard
PC software
Instrument operation
ANT-20SE is operated using the standard Microsoftâ Windows TM
graphical user interface.
Operation is menu-controlled using the touchscreen.
A mouse can also be connected if desired.
Application selection and storage
ANT-20SE includes an applications library to which customer-specific
applications can be added.
All applications are stored internally on the built-in hard disk drive
and can be copied to any other ANT-20SE via floppy disk or super disk.
Easy to use filter functions allow quick selection of the desired
application.
Touchscreen display
A large display screen is available for the ANT-20SE:
Color TFT screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.4@, 256 colors
Resolution . . . . . . . . . . . . . . . . . . . . . 6406480 pixels (VGA standard)
The touchscreen allows very easy point and shoot operation.
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Figure 5: Histogram results display.