User Manual

AS4000 DA CT Commissioning Unit
Operators Manual
DLP 001
605-0000-455
Issue 2.0 Date 21/03/00
Page 20 of 28
* The rate at which the link will acquire is defined as follows:
1: 10kbit/s
2 40kbit/s
3 80kbit/s
4: 160kbit/s
7. For testing type in the code relating to the system as set up i.e. LK 7 1 4 4 0 9. In the
example above the DACU is forced to acquire on RW 7, PN 1, with Uplink and
Downlink of 160kbit/s, using RF channel 9 within the RF band.
With the LAT connected to the DACU, ensure that it has booted-up.
Type: LK F 1 1 1 0 1 to set channel 15 and LK 1 1 1 1 0 1 to set channel 1 or LK 2 1
1 1 0 1 to set channel 2.
8. Type W 426 to monitor link state.
9. The DACU will return with:
Display Interpretation
D: 0426 0000 No Link
D: 0426 0101 Downlink Acquired
D: 0426 0303 Uplink Acquired (transitory state)
D: 0426 0B0B Uplink Acquired
D: 0426 0808 * Downlink has failed
D: 0426 0909 * Uplink has failed
*Note: relate to a link failure
Table 2 Link States
10. Once the DACU acquires the link, the RX gain can be commissioned. If the link does
not acquire, then it will be necessary to change the RX gain through Sitespan. To
check if the Link has acquired check the Green LED is illuminated on the Modem
Card. The top 4 LEDs show the first modem at the different acquisition rates and the
next 4 LEDs show modem 2.
11. Using Sitespan highlight the shelf, and edit ‘parent properties’.
12. Select ‘Airspan DA CT modem shelf’.
13. Adjust the ‘Rx Gain’ by increasing and decreasing the values. Note: To start with, set
the RX gain to around 2200. ( if value is reduced power goes UP). Check the output
power of the DACU, and repeat until the output power matches that in the DACU
Calibration Table.
14. Record the result. The values of the TX and RX gain must be set into the Sitespan at
the AC before the backhaul is connected to the CT, failure to do this results in the TX
power and RX sensitvity values being overwritten by the value stored in the Sitespan
Server.