Specifications

Page 25–4
FOCUS System Manual
•Fiber Optic cable with ST connectors
•One FOCUS chassis
The 6NF module always transmits, so you will see
the TX LED continuously illuminated. A 6NF
interface has two ST connectors, for XMIT and
RCV. This acceptance test consists of looping
back the 6NF module into itself thereby verifying
it’s throughput. To conduct this loopback test:
1) Plug in one end of the fiber optic cable to
the XMIT connector on the interface.
2) Plug the other end of the fiber optic cable to
the RCV connector on the interface.
You should see the ‘Valid Data’, ‘RX’ and ‘TX’
LEDS illuminate. This completes the acceptance
test.
25.5 Drawings
The schematic for the 6NF module is available
upon request. The component location drawing
for the module and it’s interface are at the end of
this chapter.
Yes Y
ellow
Alarm On
Remote FOCUS is not receiving transmitted signal from local FOCUS
No Yellow Alarm On CLEARED
Returned to normal
No Settings Mismatch CLEARED
Returned to normal
Yes Invalid Data
6NF channel module receiving bad data
No Invalid Data CLEARED
Returned to normal
ALARM, EVENT TEXT,
CONCERN? EXPLANATION OF EVENT
Table 25–2 6NF Alarm Events
Table 25–1. 6NF Module Specifications.
Some users have asked what action should be taken when experiencing different alarm conditions. The
following table is offered as a guide for this purpose.
Catalog ID 6NF
Data Rate (Internal) 64K-1.536K
Data Rate (External) 2.048 mbps
Protocol (External) IEEE C37.94
Connector 2 x ST (TX - output, RX - input)
Indicators Valid Data Alarm
RX TX
Alarm Output Yellow Alarm