User's Manual

Navini Networks, Inc. Ripwave Base Station I&C Guide
41
Item Description Termination
Protection specified in
Manual
TDD SYNC
TDD Sync is a TTL Sync pulse at
10 ms cycle rate, 0 t0 +5V swing,
which is 5 µs long in width. This
output of BTS is used for
equipment debugging and to
synchronize test equipment
Test equipment such as
oscilloscope or spectrum
analyzer
Not Required
GPS Antenna
A/B (2)
The GPS coax cable connected
to GPS antenna LNA carries +5
VDC and a 1.57 GHz RF signal.
RF is an input to BTS; DC is an
output from BTS
GPS antenna/LNA, which
is normally located at BTS
or on hut of BTS; not on
tower
Not Required
RFS Calibration
Cable (1)
This coax cable is an RF signal
path to the RFS. The signal is a
low power, at the operating
frequency of the BTS
RFS connection to BTS
Lightning protection
devices must be UL497
listed
RFS Antenna
Cables (8)
This coax cables are an RF
signal path to the RFS. The
signal frequency is the operating
frequency of the BTS. In the
TTA version of the BTS, these
cables also contain a +24 VDC
component and the 10.7 MHz
TDD signal on the center
conductor.
RFS connection to BTS
Lightning protection
devices must be UL497
listed
Power/Data
Cable
This cable is a 6-twisted pair
bundle cable used for sending
low-current DC voltage to the
RFS at +8 to +12 V as well as
RS485 digital bus for TDD
control
RFS connection to BTS
Lightning protection
devices must be UL497
listed