DRU receive tests
11-31
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
Step
Action
Observation
11
Enter the “R” option to query the RSSI
measurement.
>R
<return>
RSSI measurement is displayed and the
output message will show:
continuing Query..(hit return
to exit)
12
Check the RSSI measurement displayed on the
terminal screen and record it.
RX RSSI : - 57.0
RX SAT : N
RX ST : N
13
Use the O command to enter the value of dB1=
(input level - measured RSSI reading - RF cable
loss value) as the RSSI offset for path A, antenna
1.
>O
<return>
>A dB1 0 0
The RSSI offset should be kept to ±5 dB to keep
RSSI values between -130 dBm and -30 dBm.
Example:
Input level: -60dBm
Measured RSSI value: -57dBm
Typical RF cable loss: 1dB
then dB1 = -60 - (-57) - 1 = - 4dB
Enter path (A or B) and three separate
dB values (± 0…100).
14
On the communications monitor, change the RF
signal level as shown in Table 11-4 and record
the RSSI measurement from the Debug terminal.
Requirement as shown in Table 11-4
15
Change the Antenna path with the N command
to path ‘B’ from the Debug terminal.
>N
<return>
The DRU will request an antenna path
choice. Enter path ( A,B, or DIV ).
16
Enter the antenna path
>B
<return>
Change the connection to the RMC input port B
accordingly.
Current Receiver path:
B
17
Repeat step 7 to step 12 for the new antenna
path.
- continued -
Summary of Contents for DualMode 800
Page 2: ......
Page 4: ......
Page 6: ...vi Publication history Nortel Networks Confidential 411 2051 500 Draft 00 01 November 1999...
Page 82: ...2 20 Periodic maintenance 411 2051 500 Draft 00 01 November 1999...
Page 90: ...3 8 Test equipment and precautions 411 2051 500 Draft 00 01 November 1999...
Page 100: ...5 6 Master Oscillator tests 411 2051 500 Draft 00 01 November 1999...
Page 106: ...6 6 Antenna and transmission line tests 411 2051 500 Draft 00 01 November 1999...
Page 116: ...8 4 Alarm Control Unit ACU tests 411 2051 500 Draft 00 01 November 1999...
Page 138: ...10 2 ICRM tests 411 2051 500 Draft 00 01 November 1999...
Page 200: ...12 10 Enclosure maintenance 411 2051 500 Draft 00 01 November 1999...
Page 208: ...A 8 Appendix A Frequency table 411 2051 500 Draft 00 01 November 1999...
Page 215: ......