User Manual

AS4000 Subscriber Terminal
Installation and Commissioning DLP 018
605-0000-436
Issue 1.5 Date: 18th October 1999
Page 1 of 2 1988 Airspan Communications Corporation
DATA TESTS ST-D128 INSTALLATIONS
The following procedure will have to be completed before placing the
AS4000 system into service. All results must be entered on the
Commissioning Test Result Sheet, see DLP-019.
STEP PROCEDURE
BER Test
If AS4000 modem shelf is not in service the following test can be carried out.
This Test is carried out at the Central Terminal Rack.
1. At the ST. Place Tx/Rx Loopback cord either at the CRU or in the NTU RJ45
socket.)
2. At the CT Rack Ensure that the CT shelf is programmed from the Site Controller
with :
• Modem Frequency
• PN Code
• Signalling: GCAS
• ST Mode: E1
• ST o/g Idle code: 3
• ST i/c Idle code: 0
• ST deafault frame: 0
Create Subscribers on Database
Set Subscribers in service.
3. At the CT Modem Shelf 2Mbit/s network interface connect a BER tester (Tx SK16
and Rx SK15)
Set the tester to:
Transmit:
Signalling: Disable
Line Coding: HDB3
Timing: Internal
Test Pattern: PRBS23
Receive:
Signalling: Disable
Line Coding: HDB3
Timing: Recover from data stream
Test Pattern: PRBS23