• Receive data rate. This is the instantaneous receive data rate, which varies with
modcod.
• Receive modcod. This is the current receive modulation and FEC rate, which the
remote modem varies in accordance with the Es/No being received by the local
modem.
ACM operation is described in Section 7.8.13.
6.2.2.5 Status AUPC
The Automatic Uplink Power Control (AUPC) section of the Status screen is displayed
and continually updated with the following information when AUPC is enabled:
• Remote Eb/No. This is the current Eb/No reported by the remote modem.
• Power offset. This is the current offset that has been applied to the nominal
modem power output level in order to maintain the remote Eb/No at the target
level.
• Link. This is the status of the Engineering Service Channel (ESC) link, which in
non-DVB-S2 modes is used to pass AUPC control messages to the remote
modem and to read back the remote Eb/No level. The ESC channel is not used
when AUPC is used with DVB-S2. The status is shown as Failed if the link is not
working correctly otherwise it will be shown as OK.
6.2.2.6 Status BUC/LNB
Under the Status BUC/LNB tab, Block Up Converter (BUC) status is continually updated
with the following information when a BUC is being controlled from the modem:
• BUC output. This is the output power in dBm at the waveguide flange, or Off when
the BUC is not transmitting.
• BUC temperature. This shows the temperature in degrees Centigrade reported by
the BUC.
• BUC class. This shows the BUC power class in Watts.
• BUC current. When a BUC PSU is fitted then this shows the BUC current level in
Amperes.
• LNB voltage. When an LNB is fitted then this shows the LNB voltage in Volts.
• LNB current. When an LNB is fitted then this shows the LNB current in milli-
Amperes.
All of the BUC status, other than BUC current, requires a communications link to exist
between the modem and the BUC. BUC and LNB under and over-current alarms can be
controlled via the Edit->Unit->Alarms screen. (Note that only Q-Flex™ modems produced
from the second half of 2014 onwards support the LNB current monitor function.)
6.2.3 Edit Screen
The Edit screen contains the following tab menu options:
• Tx-Rx. These menus allow setup of the modem transmit and receive paths.
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