Grass Valley 8943CF - Manual (Page 23)

8943CF — Instruction Manual 23
Installation
Cabling
Cabling is done on the rear BNCs of the 8943CF-R module illustrated in
Figure 17 .
Note Before making any fiber connections, refer to the Fiber Optic Cleaning
Requirement
on page 14 .
Figure 17. 8943CF-R Rear Module
Attenuation Requirements
Some shorter length cable runs will require attenuation to prevent over-
driving the receiver causing bit errors to occur on the fiber link. Use the fol-
lowing guidelines for adding attenuation:
• The 1310nm Dual Transmitter (SFP-13103G-M1DTX) requires no atten-
uation between fiber transmitter and receiver connections at any cable
lengths.
• CWDM devices used with 8939FCA modules for a mux/demux config-
uration (
page 25 ) with a cable run from 0-12 km (7.5 miles), must be
attenuated by 3 dB between 8939FCA COM ports.
• All CWDM devices used in a point-to-point configuration with a cable
run from 0-20 km (12.4 miles), must be attenuated by 5 dB between
fiber transmitter and receiver connections.
8772_01r0
8943CF-R
OUT OUT
IN OUT
CH1
IN
1
2 3
4
OUT
CH2
IN OUT
CH3
IN OUT
CH4
CH 1 Electrical Out CH 1 Electrical In
CH 1 Fiber Out
CH 2 Fiber Out
CH 2 Electrical Out CH 2 Electrical In
CH 3 Electrical In CH 3 Electrical Out
CH 3 Fiber Out
CH 4 Fiber Out
CH 4 Electrical Out CH 4 Electrical In