Comtech EF Data DD240XR Rev Е - Manual (Page 46)

User Interfaces DD240XR High-Speed Digital Demodulator
4-26 MN-DD240XR – Rev. E
TYPE: Terrestrial interface board type.
BOARD ID: Displays hardware revision of terrestrial interface board.
4.2.7 Test Menu Options and Parameters
TEST (Menu):
TEST PATTERN: {NONE, 2^15-1, 2^23-1}
This is used to select the test pattern being received. To
start a test the 2^15-1 or the 2^23-1 values should be
selected.
The test values may be frozen and recorded by setting
TEST PATTERN to NONE, the value will not be cleared
unless TEST PATTERN is changed again, TEST RESET
is used, synchronization is lost, or the unit’s power is
cycled.
PATTERN SYNC: {TRUE, FALSE}
This is a read only status value. The value indicates
whether the test pattern is being successfully detected.
The runtime, bit count, and bit error count will not start
until synchronization has been achieved.
EARLY SYNC LOSS: {TRUE, FALSE}
This is a read only status value. The value indicates
whether the test pattern was successfully detected and
then lost since the test pattern was selected.
Note: Once a pattern synchronization loss occurs
BIT ERRORS, TOTAL BIT COUNT, BIT ERROR RATE
and RUN TIME will be reset to zero. Once pattern
synchronization re-occurs BIT ERRORS, TOTAL BIT
COUNT, BIT ERROR RATE and RUN TIME will start
counting from zero.
PATTERN SENSE: {NORMAL, INVERTED}
This is a read only status value. The value indicates
whether the test pattern is detected as an inverted or
non-inverted. This value should correspond to the
pattern sense used by the transmitting equipment.
BIT ERRORS: {64 BIT VALUE, >=0}
This is a read only status value. The value indicates
absolute count of bit errors detected since
synchronization.
TOTAL BIT COUNT: {M.ppppppE+ee}
This is a read only status value. This is a scientific
notation value where the mantissa is given with six-point
precision and the exponent may be as large as +32.