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7700 Multi-Frame Manual
7707EO-HD SD/HD Re-Clocking Electrical to Fiber Converter
4.
STATUS INDICATORS AND DISPLAYS
The 7707EO-HD has 9 LED Status indicators and a 4 digit alphanumeric display on the front card edge to
show operational status of the card at a glance. The card edge pushbutton is used to select various
displays on the alphanumeric display. Figure 4-1 shows the locations of the indicators, jumpers and
pushbutton.
4.1.
STATUS INDICATOR LEDS
LOCAL FAULT:
This Red LED indicates poor module health and will be On during the absence of a
valid input signal, if a laser fault exists, or if a local input power fault exists (ie: a
blown fuse). The LOCAL FAULT indication can also be reported to the frame
through the FRAME STATUS jumper.
MODULE OK:
This Green LED indicates good module health. It will be On when a valid input
signal is present, and the laser and board power are good.
SIGNAL VALID:
This Green LED indicates the presence of a valid input signal. The coaxial input is
considered valid when the module has attained lock to the signal. If the reclocker is
in non-reclock mode, then the input is considered valid when the module detects the
presence of a carrier as indicated by the CARRIER FAULT LED.
CARRIER FAULT:
This Yellow LED will be On when the cable equalizer detects a weak signal carrier
at the coaxial input. The CARRIER FAULT threshold is calibrated to a cable
equalization of 150m of Belden 1694A cable @ 1.485 Gb/s.
LASER FAULT:
This Red LED indicates poor operation of the optical output laser, leading to limited
laser life. The optical output laser is enabled only while a valid input signal is
detected as indicated by the SIGNAL VALID LED.
RATE - SD:
This Green LED indicates that the reclocker is locked to one of the SD rates.
7707EO-HD - 8
RATE-SD
RATE-HD
EDH DISABLED
REMOTE
Figure 4-1: Location of Status Indicators and Jumpers
FRAME STATUS
ON/OFF
LOCAL FAULT
MODULE OK
SIGNAL VALID
CARRIER FAULT
LASER FAULT
DISPLAY
SELECT
RECLOCK
AUTO/BYPASS/FORCE
FORCED RATE
HD/SD/310M
MASTER
LOCAL/REMOTE
UPGRADE
UPGRADE/RUN
Revision 1.5
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