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Chapter 4 Test Results
LED results
Data Communications and Diphase Testing Manual
Page 32 21148872, Rev. 002 January 2016
Table 8 describes the LEDs, and indicates whether each LED is applicable when
running HS Datacom or Diphase tests.
Data LED results
The inside Data LEDs indicate the space state of each circuit; the outside column indi-
cates the mark state of each circuit. The acronyms representing the circuits are those
Table 8 HS Datacom and Diphase LEDs
LED Indicates
HS Datacom Diphase
Rx Clock Present Green
– A receive clock is detected.
Red
– A receive clock was detected, then lost
since the last test start or restart.
X X
Tx Clock Present Green
– A transmit clock is detected.
Red
– A transmit clock was detected, then lost
since the last test start or restart.
X X
Rx Clock Invert Green
– The polarity or the receive clock is the
opposite of that specified for the instrument.
Red
– The polarity or the receive clock is the
opposite of that specified for the instrument.
X
Rx Data Loss Red
– Indicates receiver synchronization was lost
due to a loss of data after at least one data
transition occurred.
X
Pattern Sync Green
– Synchronization with the received patterns
has been achieved.
Red
– Synchronization has been lost since the last
test restart.
X X
Pattern Invert Yellow
– Indicates the received PRBS pattern is
inverted.
X X