Using the TT1220 with the NDS Director System
Page E-4
Instruction Manual: Professional Receivers and Decoders (IRD)
ST.TM.TT1220.1
E.2.2
Set Power-up Channel
Sets the Receiver power-up service. If the Emergency Channel has not
been set, it is set to this service.
If neither the Emergency nor Power-up Channel have been set, the
TT 1220 will be in an indeterminate state at power-up.
E.2.3
Set Emergency Channel
Sets the service to use in the event of a selection failure. It is activated
after a specified time has elapsed. If not set, the Power-up Channel is
assumed.
Setting the Emergency Channel allows a failure situation to be recovered.
E.2.4
Force Tune Carrier
Forces the Receiver to retune to a different frequency and/or service. This
could be a service on a different feed (e.g. LNB input 2) or a service
previously set up using the Store Carrier Data command. Timeouts allow
the Receiver to revert to the original service after the time has expired. If
the command fails, the Emergency channel is used. Enter a timeout of not
less than 15 seconds (except 0 to permanently switch to the new service)
to give the Receiver time to retune.
This command fails if the LNBs are not set up realistically (which may
happen if the source is changed).
Take care when retuning to services on different LNB inputs. Force Service
Selection is more efficient if the required service is on the same frequency
and LNB input.
E.2.5
Force Tune Service
Forces the Receiver to decode a different service or stored channel (which
may require a retune). The command is generally used to hop between
services. The Director system has to be informed of the frequency,
FEC-rate and symbol-rate for each stream. This is set up using the
MEM/MCC.
The Director User Interface and the Director core require restarting to
register changes that have been set in the MEM/MCC.
E.2.6
Set Default Audio Language
Sets an audio decoding preference for Audio and Audio2 when selecting a
service.
E.2.7
Store Carrier Data
Stores a particular service as a preset channel. Subsequently, the
head-end can force a service selection from this preset – see
Section E.2.5, Force Tune Service.
E.2.8
Front Panel Display
Displays a text string on the LCD front panel. The message is displayed for
a set time, until cleared from the Head End or the keypad is activated.
