User Manual

AS4000 Subscriber Terminal
Installation and Commissioning DLP 018
605-0000-436
Issue 1.4 Date 11/4/99
Page 31 of 60 © Copyright Airspan Communications Corporation 1999
automatically closed STMON communications - STMON support is reactivated by
pressing F1. If after pressing F1 the comms time-out alarm does not clear then this
indicates that there is a cable / com port selection fault or that the ST is faulty.
STMON display panel description
1. A brief description of the STMON display panels follows.
Table 5. Uplink Panel
Uplink Panel
Link Status of Uplink, either No link or link OK.
PC
Transmit Power Control level, 0.00 to 3.00, will be displayed if the
calibration flag is NOT set if the calibration flag is set then the
range will be 0-5 V. A low PC level indicates low transmit power
and implies that the RF path is unstressed.
TX Power
The TX signal power will be displayed in the range of 0dBm to
25dBm only if the calibration flag is set , i.e. if NVRAM calibration
is employed. If not ’uncalibrated’ message will be displayed instead
of transmitted signal power.
Table 6. Downlink Panel
Downlink panel
Link Status of Downlink, either No link or link OK.
AGC
Receive Automatic Gain Control level, 0.00 to 3.00, will be
displayed if the calibration flag is NOT set if the calibration flag is set
then the range will be 0-5 V.. A high AGC level indicates high
received signal power and implies that the RF path is unstressed.
RX
Power
The RX signal power will be displayed in the range of - 80dBm to -
105dBm only if the calibration flag is set , i.e. if NVRAM calibration
is employed. If not ’uncalibrated’ message will be displayed instead
of received signal power.
Errors
/sec
Number of soft errors counted on the downlink averaged over one
second. The soft error count does not directly correspond to a link
Bit Error Rate as most soft errors are corrected by forward error
correction, but this is a reasonable indication of data link quality.
below gives atypical error count for a 15 user system - low error
counts should be expected in systems populated with less than 15
users.