Verilink ConnecT 56K DSU (896-502110-001) Product Manual - Manual (Page 49)

2 = TEST
ConnecT 56K DS User Manual 3-19
While this test is being performed, the ConnecT 56K DSU displays:
DTE WITH TP TEST ERR=XX
The first line of the display indicates the type of test being performed
while the second line of the display indicates the number of errors
accumulated by the test pattern detector.
If errors occur during this test, the TEST ERR display can be reset to
zero, by pressing the “1” key. To verify proper operation of this test,
single bit errors can be injected into the transmitted test pattern by
pressing the “2” key. These errors will appear on the TEST ERR displa .
5 = Test Pattern
The TEST PATTERN selection actually converts the local ConnecT 56
DSU into a BERT tester for use in testing a remote DSU over the actual
communications circuit. With this test the remote DSU can be looped
back in either the DTE and LOOP (LL) or the LOOP ONLY (RT) mode.
Instead of being looped back the remote DSU can operate in the data
mode with data supplied from an external BERT tester, or it can be
operating in the TEST PATTERN mode. The data paths for this mode are
illustrated in Table A-5, “Test Pattern Only Diagram,” on page A-10.
When this test selection is chosen the system presents the same test
patterns as for DTE With TP.
Menu map
2=TEST/1= LOCAL UNIT/5=TEST PATTERN/Submenus 1-6/Displays
Operation
Follow standard operating procedures. When 5=TEST PATTERN is
flashing: Press the Enter button resulting in the system briefly displaying
“Please Wait” after which it displays the first of the test results.
1=2047 PATTERN
2=511 PATTERN
3=STRESS PTRN #1
4=STRESS PTRN #2
5=STRESS PTRN #3
6=STRESS PTRN #4
5=TEST PATTERN
LOOP 56K
DTE 56K SYNC
TR
OFF
SR LLB RLB
OFF OFF OFF
UNIT IN TEST
LOOP IS NORMAL
TEST PATTERN
TST ERR=00
Displays