Telecommunications Techniques Corporation interceptor 147, Reference Manual, Page: 193 / 280

7-13
7
INTERCEPTOR 147 2 Mbit/s and Data Analyzer
Applications
3. Set the CONFIGURATION category items
Set Transmitter to ON.
Set Framing to the format used by the circuit
under test when in service (or set Framing to
AUTO).
Set Loopcodes to OFF (not performing loopback
BERT testing) or to the appropriate terminating
equipment for the circuit under test (CBITS or
SA6BITS).
Set Tx Clock to INTERNAL (or INT 2048K if
Option 147-1 is installed).
Generally, set Pattern to a pseudorandom pattern,
such as 2^15-1 or 2^23-1. (These patterns are
good choices because they simulate live traffic.)
4. Select the timeslots to be tested
If the timeslots used in the transmit and receive
direction are not the same, then set Coupling to
Tx
≠
Rx.
5. Set ALARM/SIGNAL category items
Set each type of Tx Alarm to OFF (so that no
alarms are generated).
6. Check AUXILIARY category items
If you are using a printer, set all printer-related
setup items as desired. (For more information,
see Section 5). Check the Time and Date items
to verify they are set for the current time and date.
7. Set RECEIVER control to TERM
This is an out-of-service test that requires cable
equalization, and to select 120
Ω
or 75
Ω
, as
appropriate.
8. Connect to the RECEIVER connector
Using the selected RECEIVER connector,
connect the test instrument to the receive direction
of the circuit that is being tested.