Q-Flex Satellite Modem Installation and Operating Handbook
6-6
6.2.2.1.1 Status Traffic
The
Traffic
section of the
Status
page is continually updated with the following
information:
•
Transmit path status
. When there is no transmit path fault then the message ‘Tx
OK since HH:MM:SS on DD/MM/YY’ is displayed (where ‘HH’ indicates hours,
‘MM’ indicates minutes, ‘SS’ indicates seconds, ‘DD’ indicates the day of the
month, ‘MM’ indicates the month of the year and ‘YY’ indicates the year). When a
transmit path fault exists then a fault message is displayed instead that indicates
the nature of the fault.
•
Receive path status
. When there is no receive path fault then the message ‘Rx
OK since HH:MM:SS on DD/MM/YY’ is displayed (where the time and date
format is as above). When a receive path fault exists then a fault message is
displayed instead that indicates the nature of the fault.
•
Transmit carrier status
. This displays one of the following:
o
'
Normal
': the carrier is on.
o
'
Mute-Ext
': the carrier is muted due to an alarm detected by the modem
hardware.
o
'
Mute-Ter
': the carrier is muted due to either the terrestrial Tx RTS pin
being active (this is an input signal that can be used to mute the carrier
under external control as required) or some other problem being
experienced with the terrestrial interface.
o
'
Mute-1:1
': the carrier is muted due to being the Standby modem in a 1:1
redundancy system.
o
'
Mute-Brk
': the carrier is muted following a power outage.
o
'
Mute-Flt
': the carrier is muted due to an alarm detected by the modem
software.
o
'
Mute-Cfg
': the carrier is muted due to the modem being in the process of
reconfiguring.
o
'
Mute-Off
': the carrier has been muted by the user.
•
IP Tx buffer fill status
. This is displayed when the IP terrestrial interface is
selected and shows, as a percentage, how full the modem’s transmit buffer
towards satellite is.
6.2.2.2 Status Demodulator
The
Traffic
section of the
Status
screen is continually updated with the following
information:
•
Receive Es/No
(i.e. energy per symbol to spectral noise density ratio).
•
Receive Eb/No
(i.e. the energy per bit to spectral noise density ratio).
•
Receive power level
(i.e. the level of the wanted signal).
•
Receive composite power level
(i.e. all of the power in the receive channel,
consisting of both wanted and unwanted signal).
•
Receive frequency offset.
This is the measured offset from the expected carrier
centre frequency. It indicates any frequency shift that is introduced by the satellite
and frequency conversion equipment.
