Specifications

2
n Performing Self-diagnostics, remote tests and maintenance checks
The RP is equipped with self-diagnostic capabilities that are executed at power
up or upon receiving designated test commands. The RP continuously monitors
its hardware and its environment; alarms are generated if any fault is detected.
The RP collects QI, WEI, RSSI, and performance of RP circuitry information and
passes it to the RPCU. The RP utilizes the loopback function to determine if the
RP electronics are in proper working order. This test can be administered
remotely via data links.
n Word Error Indication(WEI) measurement
The RP performs WEI measurement and forwards detected error indications to
the RPCU for further processing. The uplink WEI is automatically sent back to
the SU on the next downlink as well.
n Received Signal Strength Indication(RSSI) measurement
The RP determines the strength of signals received in each burst and forwards
those measurements to the RPCU for further processing
n Quality Indication(QI) measurement
While in communication with the SU, the RP continuously monitors the
receive signal quality of the radio link between itself and the SU by measuring the
signal-to-impairment ratio. Impairments include thermal noise and interference.
This information, used as the input to the uplink power control procedure, is
transmitted back to the RPCU for processing.
Function Specifications
Basic Functions
l Operating
Frequency band
Transmit 1930.5-1989.6 MHz
Receive 1850.5-1909.6 MHz
l
Air Interface
Standard
JTC (J-STD-014)
l Access Method TDM/TDMA
l Time Slots/Carrier 8
l Channel Spacing 300 kHz
l Modulation
Scheme
π/4 DQPSK
l Frequency
Assignment
QSAFA
l Frame Length 2.5 ms
l Operating
Temperature
-20
o
C to +50
o
C
Interface with RPCU
l P-interface
Connect to RPCU via P-
interface using HDSL transmission.
The P-
interface carries an embedded operations channel
(EOC) which conveys commands for performing QSAFA.