User Manual

AS4000 Subscriber Terminal
Installation and Commissioning DLP 013
605-0000-436
Issue 1.5 Date: 18th October 1999
Page 8 of 14
Downlink panel
Link Status of Downlink, either No link or link OK.
AGC
and RX
Power
If the CRU has been factory calibrated, the actual RX power will be
given in dBm (range - 85dBm to -105dBm). and the AGC control
Voltage is in the range 0.00 to 5.00 V (where 0.00V = maximum
power). For un-calibrated CRUs the TX Power displays ‘Uncal’ and
the control voltage is in the range 0.00 to 3.00V(where 3.00V =
maximum power).
Rate
The acquisition rate
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.
Table 19 below gives atypical error count for a 15 user system - low
error counts should be expected in systems populated with less than
15 users.
Table 18. Downlink Panel
Soft error count / second Downlink quality
<4000
Excellent
4000-5000
Good
5000-7000
Fair
>7000
Poor
Table 19. Error Count
3.1 Program Data Panel
Digits
Accepts digits entered by the user during the STMON install
Table 20. Program Data Panel
ST Status panel
ST s/w state
Internal operational state of the ST software. See Table 24 below.
ST alarm
Indicates ST alarm condition. May be blank (no alarm), Initialising
or Faulty.
Table 21. ST Status Panel