User's Manual

Doc. No.
Rev.
Date
DRAFT
1.01
2012-01-27
Damm Cellular Systems A/S, Denmark
TetraFlex
®
7.5 Manual - SB421
TetraFlex® 7.5 Manual 1-12
NOTE: For change in the field, please order a change kit from DAMM. This kit
includes a manual dealing with this issue, jumpers, screws, markings etc. This
change operation includes soldering and unsoldering of SMD components and
should only be done by skilled technicians familiar with SMD handling
The following hardware jumpers need to be changed for correct 3 and 4 carrier or redundant
operation of the SB421:
Normally closed – change to open (marked with green):
J211
J241
J252
J255
Normally open – change to closed (marked with red):
J212
J242
J251
J254
Figure 1-10: Interconnection board jumpers