User's Manual Part 1

Table Of Contents
3EM21522AAAA Genera
l
Issue 1, March 2008 DTR-0200-SA-SIRIUS
1-9
1.7
REPEATER COMPONENTS LOCATION
The repeater enclosure cabinet contains field replaceable subassemblies called “Least
Replaceable Units (LRUs)” as listed in Table 1-8.
Figure 1 - 5
locates the repeater components including the LRUs.
The part number for the entire repeater enclosure cabinet with all electronics and
internal equipment is P/N 3EM04000AA.
Table 1-6 Repeater Test Ports
Repeater Out Forward Power Connector: N-type, female, 50 ohms, Coupling: -50 dB
Repeater Out Reflected Power Connector: N-type, female, 50 ohms, Coupling: -40 dB
HPA RF Monitor Connector: N-type, female, 50 ohms, Coupling: -50 dB
Upconverter RF Out Monitor Connector: SMA, female, 50 ohms, Coupling: -20 dB
Table 1-7 Repeater Test Modes
CW Signal COFDM spectrum replaced by a single carrier 4kHz aside from the
center frequency. The RMS level of the single carrier is equivalent to
average RMS level of normal COFDM spectrum. The signal is
intended for testing of in-band signal-to-noise ratio.
Notch Signal Movable group-of-carriers hole for test of intermodulation and quanti-
zation noise
PRBS Signal Empty DARS frames (PRBS sequence)
Table 1-8 Repeater Least Replaceable Units (LRUs)
Signal Processing Unit (SPU)
Refer to Appendix B
for part numbers
High Power Amplifier (HPA)
RF Output Coupler
RF Detector (Two; one forward, one reflected)
Cabinet Exhaust Fan (two exhaust fans under roof)
Cabinet Exhaust Fan Relay
Cabinet Intake Fan (two intake fans in rear door)
Cabinet Intake Fan Relay
PDU Circuit Breakers