Calibration
98-150471-A02
Chapter 6: Configuration
6-11
Confi
guration
Elevation cutoff: Not relevant for calibration.
LNB: Co-pol or X-pol, use this for test if both the LNBs and RX cables function properly in
case of issues with the reception of a signal. The polarisation must remain the same as
stated for the transponder used for the azimuth calibration. The antenna will just turn
the polarisation motor 90 degrees to use the other LNB to receive the same signal.
5. Click
Apply
to save the settings for the service profile for calibration. The system is
ready for the azimuth and cable calibration.
6.2.4
Cable calibration
You must make a cable calibration.
1. On the page
SERVICE > Calibration
click
Start
in the section
Cable calibration
.
2. Wait typically for 2 minutes for the calibration to finish. A message is displayed when the
calibration has been completed successfully.This screen shows how much attenuation
margin is left for the antenna cable. This indicates whether the antenna cable and
connectors are in good condition and well crimped.
It is recommended to make a cable calibration when servicing the system to check if the
antenna cable is still in good order. If the attenuator margin changes by 2 dB or more after
a cable calibration, it is recommended to do a P1dB compression measurement to verify
that the VSAT modem configuration is correct.
Satellite requirements for successful calibration
Elevation
Elevation angle: 5 – 70 degrees
Not allowed for calibration: Inclined orbit.
System encryption
DVB-S or DVB-S2
Polarisation
Horizontal or vertical polarisation.
Not allowed: Left-hand circular (L) or right-hand circular (R).
Symbol rate
The DVB symbol rate must be >5 Ms/s.
NID
Preferably a unique NID (ONID).
An azimuth calibration without NID can be useful in regions
where the satellite operators do not broadcast NID (US, China,
Australia etc.).
For NID=0 the NID is not used when checking the satellite link.
Table 6-6: Satellite requirements for elevation and carrier
Figure 6-9: Web interface: SERVICE, Calibration, cable attenuator margin
SAILOR900HP.book Page 11 Monday, July 18, 2016 12:44 PM
