SatLink VSAT User Guide
Publication no. 101557
Copyright © 2009 – STM Group, Inc.
Page 54 (160)
1. Ensure that the STM SatLink VSAT configuration procedure in section 9.2 has been performed.
2. Ensure that the STM SatLink VSAT receiver is started and the Forward Link is acquired
• Check that the receiver is running by issuing the CLI command
dvb rx show. If the receiver is
not turned on, start the receiver by issuing the CLI command
dvb rx start.
• Check that the forward link has been acquired by verifying that the CLI message
Forward Link
up
is displayed on the CLI output.
3. Ensure that the STM SatLink VSAT transmitter is turned off
• Enter the CLI command dvb tx show. Verify that the transmitter is Off. If the transmitter is
On, use the command dvb tx logoff to turn the transmitter off.
4. Ensure that the TX cable from the STM SatLink VSAT to the ODU is connected
5. Use the CLI command
dvb tx eirp <level> to configure the transmit EIRP level. The VSAT
can either be configured to transmit at maximum level (operating at the P1dB compression point)
using the command
dvb tx eirp max, or alternatively the desired EIRP level can be set to a given
level for use in a system where the power level received at the satellite is aligned for all VSATs. The
factory default configuration is to transmit at the P1dB compression point.
Example:
dvb tx eirp 42 sets the output to 42 dBW.
dvb tx eirp max selects maximum output power.
Save the configuration by using the CLI command
save config.
6. Verify the transmitter configuration using the CLI command dvb tx show.
Example:
# dvb tx show
Satellite (DVB) TX Configuration
--------------------------------
Auto start : Disabled
Population ID : 2
IDU output power : -15 dBm
EIRP : max
Default CW Frequency: 14.488000 GHz
AAL5 Encapsulation : VC Mux
DVB Transmitter Status
----------------------
State : Off
#
The CW frequency to use for measurements during the calibration procedure is obtained from the
service provider or satellite operator.
7. Contact the satellite operator / control centre to clarify the line-up procedures for transmission power
calibration and fine adjustment and verification of polarization of the STM SatLink VSAT.
8. Have contact by phone with the control centre when performing the following measurements.
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