ViaSat VMBR-1520, Installation, Operation And Maintenance Manual, Page: 49 / 88

VMBR-1520 Mobile Broadband Router Installation, Operation, and Maintenance Guide
Operating Procedures
Rev. 001 1075152
4-15
4.3 Adjusting Return Link Power
During normal operation, once the VMBR-1520 is logged into the
network, the Return Link transmit power is dynamically adjusted by
the ArcLight Network Control for optimal performance. No user
intervention is required.
The following example demonstrates setting the Return Link transmit
power during initial startup. The highlighted parameters are used to
set the proper initial transmit power when the modem is attempting to
log into the network. The parameter
Power
(Item I) sets the initial
transmit power to be
x
dB below the maximum transmit power. The
parameter
Power Limit
(Item K) sets the maximum allowable transmit
power to avoid saturating the BUC and the Power Amplifier.
In the
Main Menu
, select item 4 –
Return Link Parameters
.
Enter in the desired attenuator value setting (higher value means lower
transmitter output power and lower value means higher transmitter
output power).
Enter Return Link Power (x.x dB): 20 20 20 20.0 .0 .0 .0
Return Link Parameters
(Only Initial Startup parameters.
NMS will adjust accordingly when the terminal logs in)
A - Frequency KuBand: 14401000000 Hz
L-Band: 1351000000 Hz
B - Data Rate 256000 bps
C - Chip Ratio 24
D - Packet Size 1
E - Long PN Seed 0x000001
F - Long PN Tap 0xC20001
G - Short PN Seed 0x0009
H - Short PN Tap 0x0342
I - Power 20
20 20
20.0
.0 .0
.0 dB
dB dB
dB
J - Preamble 0xC6DFA688
K - Power Limit 5 5 5 5.0 dB .0 dB .0 dB .0 dB
L - TXB State 1
Z - Help Menu
X - Exit Menu
Please enter menu item: x
x x x
Return Link Parameters
(Only Initial Startup parameters.
NMS will adjust accordingly when the terminal logs in)
A - Frequency KuBand: 14401000000 Hz
L-Band: 1351000000 Hz
B - Data Rate 256000 bps
C - Chip Ratio 24
D - Packet Size 1
E - Long PN Seed 0x000001
F - Long PN Tap 0xC20001
G - Short PN Seed 0x0009
H - Short PN Tap 0x0342
I - Power 24
24 24
24.0 dB
.0 dB .0 dB
.0 dB
J - Preamble 0xC6DFA688
K - Power Limit 5 5 5 5.0 dB .0 dB .0 dB .0 dB
L - TXB State 1
Z - Help Menu
X - Exit Menu
Please enter menu item: x
x x
x