Copyright © 2006 – STM Norway AS
Publication no. 101557, Rev. T, November 3
th
, 2006
Page 95
Example:
dvb tx cw on -30 14100000
will transmit a CW from the ODU output at 14.1 GHz with an IDU output power of –30 dBm from the
STM SatLink Terminal.
Please check immediately with the control centre if they can detect the transmitted
CW. If they are not able to see the CW at the specified frequency and expected
output power level, please power off the STM SatLink Terminal immediately
The operator control centre will instruct you to adjust your power in positive or negative steps. Never
make power adjustments steps larger than 5 dB. Please update the transmitted power level using the
above
dvb tx cw on
command until the desired power level is measured at the control centre.
When the operator confirms that the correct power level has been reached, then turn off the CW
transmission with
dvb tx cw off
before storing this power level as the nominal IDU power level to be
used for transmission. Type the CLI command:
dvb tx outpow <tx output power>
where
“tx output power”
is the power level in dBm.
Verify the setting by issuing the CLI
command
dvb tx show
and save the setting by issuing the CLI command
save config
In the following example a complete power correction routine is carried out.
Example:
dvb tx cw on -30 14100000
The operator instructs you to increase power by 5 dB (i.e.
pow
= -30 + 5 = -25
). You type:
dvb tx cw on -25
The operator instructs you to decrease power by 3 dB. (i.e.
pow
= -25 - 3 = -28
). You type:
dvb tx cw on -28
The operator instructs you to increase power by 1 dB. (i.e.
pow
= -28 + 1 = -27
). You type:
dvb tx cw on -27
The operator confirms that the correct power setting is obtained. Confirm the nominal power setting by
storing this power level. To configure the nominal power level, turn off the CW transmission with:
dvb tx cw off
