Line Stm-1 Vc-4, Full Check (Approx. 25 Min - Wavetek ANT-20 Operating Manual

ANT-20SE
5.3

Line STM-1 VC-4, full check (approx. 25 min)

Commissioning of STM-1 VC-4 communications lines
Use the "Line STM-1 VC-4, full check (approx. 25 min)" application if you intend to commission
a STM-1 line with VC-4 containers.
If the desired or required properties of the line to be tested are known, a check is first made to
see if these properties are present. The in-depth measurements (e.g. MTJ, G.826, jitter) are
performed after this.
Connecting the item under test
The optical or electrical output and input sockets of the item under test are connected to input
[17] or [14] of the receiver (RX) and output [18] or [15] of the generator (TX) for the
"Line STM-1 VC-4, full check (approx. 25 min)" application.
Measurement
The following typical line parameters are expected:
Typical line parameter
Input / Output
AU-4 structure
VC-12 structure
Termination for the VC-4 path
Loop back at VC-4 level
Table SA-8
The following alarm sensor tests are then performed:
Alarm sensor test
LOS
LOF-STM
RS-TIM
MS-AIS
AU-LOP
AU-AIS
MS-RDI
HP-UNEQ
MS-REI
B2
Table SA-9
Standard Applications
Explanation
Optical or electrical
Yes
No
No
Yes
Expected typical line parameters
→
MS-RDI & AU-AIS
→
MS-RDI & AU-AIS
→
MS-RDI & AU-AIS
→
MS-RDI & AU-AIS
→
AU-AIS
→
AU-AIS
→
No alarm
→
HP UNEQ
→
No alarm
→
MS-REI
Alarm sensor tests
ANT-20 NEXT
SA-23