User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
PAGE 2-18 SECTION 2: PRODUCT DESCRIPTION
2.4.2 DATA Connections
The connection for the CEPT-1 (E1) interface is shown in Figure 2-7 as J1 through J4 (additionally
J5 through J8 on the 4xE1 model). These connections carry the E1 signals in and out of the radio.
Multiple capacity (2xE1 and 4xE1) provide extra sets of input and output ports to connect each E1
signal.
The BNC data ports accept bipolar signals with the shield normally left open (floating) in order to
eliminate ground loop problems. If desired, the BNC shield on the data ports may be grounded
using switch settings on SW2.
For balanced E1 input, use a 120 ohm balun and BNC cables to
provide a RJ45 4-wire connection. SW2 has no effect when
using the typical balun.
Figure 2-7: CEPT-1 Interface Grounding Switch