Verilink HDM 2180 (880-503048-001) Product Manual - Manual (Page 17)

HDM 2180 DS3 DSU Overview
Verilink HDM 2180 User Manual 1-7
FCC Compliance For the HDM 2180 to comply with FCC Part 15, ferrites must be
placed on the following cables to prevent EMI:
• DS3 Transmit
• DS3 Receive
• DS3 External Timing Cable
Fair-Rite Products corporation manufactures snap-on ferrites that
will meet this criteria. Their part number is:
• 0443167251 (Verilink P/N: 400-502821-001)
Figure 1-5 Ferrite Placement for Satisfying FCC EMI Compliance
In addition to the ferrites, the chassis ground must be connected to
the signal ground on Terminal Block One (TB1) on the Multi-line
Shelf (MLS), and the chassis ground must be connected to the signal
ground on Terminal Block One (TB1) on the dual-line shelf (DLS).
For the MLS, loosen the screws for connections 3 and 4 on the TB1,
insert insulated jumper wire (14 AWG) into the slots, then tighten
the screws for those slots to secure the wire.
For the DLS, loosen the screws in the two slots in the TB1, insert the
insulated jumper wire (14 AWG) into the slots, then tighten the
screws for those slots to secure the wire.
The following diagrams show the method and locations.
CDM 2180
DS3 Cables
Ferrites
P
o
w
e
r S
upp
ly
P
A
C
291
0 1
20V
ac
HS
SI
Po
rt
HSSI Cable
BNC Timing Cable
T
X
RX