AS4000 Subscriber Terminal
Installation and Commissioning
Appendix
605-0000-454
3
Draft Issue 1.3 Date 8/02/00
Page 1 of 2
CREATING A TEST CHANNEL AT THE CENTRAL
TERMINAL
The following procedure at the
Central Terminal
will create test channels for test
acquisitions. In order to simulate the same process that the ST uses to acquire on a
‘live’ system, it is necessary to acquire the downlink only at 10kbit/s on the Test Link
Acquisition Channel. This link can then be transferred on to the Test Traffic Channel at
160kbit/s with both the downlink and the uplink.
STEP
PROCEDURE
1.
Retrieving Channel States
1.
At the Central Terminal. Connect LAT cable to DTU card
2.
Type:
TI 39
TO
Amongst other messages, DTU returns:
689973016 RADIOSLV[0x0]: Slot
States:466606660666066606660666111111111111111111111111111156664
666
The first 4 numbers returned indicates the state of RW 1, the next 4 the state of
RW 2 and so on. The meaning of the numbers is shown below:
1111:
Idle
0666:
Traffic Channel
5666:
Call control Channel
4666:
Link Acquisition Channel or Net Entry Channel
To create a test channel, an RW must be chosen which is currently idle, which
means that it must display all one’s.
2.
Configuring Test Link Acquisition Channel (TLAC)
1.
With LAT connected to the DTU, type:
EA 39:0/3A:0/3B:7
(The final number, 7, is the RW code that will become the
TLAC)
2.
Type
ES 2
3.
Configuring Test Traffic Channel (TTC)
1.
At the Central terminal connect LAT to the DTU, type:
EA 39:0/3A:0/3B:8
(The final number, 8, is the RW code that will become the TTC)
2.
Type
ES 3
