q
Setup Error Insert
— Opens the error insert menu which allows inser-
tion of the following errors in the transmitting signal.
q
Bit
— Configures the unit to insert bit errors.
q
BPV
— Configures the unit to insert Bipolar Violations.
q
Framing Bits
— Configures the unit to insert framing bit errors.
q
RAI
— Configures the unit to send a Remote Alarm Indication
(yellow alarm).
q
AIS
— Configures the unit to send an Alarm Indication Signal
(blue alarm).
q
Back
q
Loop Code
— Selects the loop code to be used.
q
CSU
— Channel Service Unit. Configures the unit to send CSU
loopback codes.
q
NIU
— Network Interface Unit. Configures the unit to send NIU
loopback codes.
q
User 1
— Configures the unit to send a user-defined loopback
code.
q
User 2
— Configures the unit to send a user-defined loopback
code.
q
In Band/Data Link
— Configures the unit to send the loopback
code either in the data stream or in the Facility Data Link. The
Data Link mode cannot be selected with D4SF framing.
q
Back
q
Transmit Level
— Selects the T1 transmit level.
q
0 dB
q
–7.5 dB
q
–15 dB
q
Back
q
ANSI CRC/Japan CRC
— Selects either the ANSI or Japanese meth-
ods for calculating CRC. Also selects between the ANSI and Japanese
methods of generating RAI.
q
Back
q
Measure BERT
— Activates menus that are used to control the BERT
measurement.
q
Display Raw Data/Histogram
— Selects whether to display the raw
data or a histogram.
q
Start/Stop Measure
— Starts or stops the measurement.
q
Insert Errors
— Injects the selected error(s) into the data stream, or
sends the selected alarm when in transmitting mode.
q
Measure Duration
— Selects the duration of the measurement. The du-
ration can be 3 minutes, 15 minutes, 30 minutes, 1 hour, 3 hours, 6
hours, 12 hours, 1 day, 2 days or the duration can be manually set.
Use the Up/Down arrow key to display the desired duration and press
ENTER
to select, or
ESCAPE
to restore the previous value.
2-34
Chapter 2 Functions and Operations
