AS 680/682
Supervisor Operation Description, Operation and Maintenance
ADS−B
5−16 Ed. 10.07
The buttons ’Switch all on’ and ’Switch all off’ can be used to switch all downlink formats on or off,
respectively. Using the ’Save as Default’ button, the current settings can be made default settings.
Using the ’Show Default’ button, the default settings are loaded.
The default downlink mask setting will be temporarily stored as long as the TSC is not restarted. To
make the default downlink mask persistent, the ’Save Settings’ menu entry in the ’Settings’ menu (see
section 5.3.3) has to be selected. This will save the current configuration settings, including the default
mask, to the [home]/.tsc/settings/settings_tsc.conf file.
NOTE:
S Replies to TCAS interrogations (DF−0) represent the majority of the load within the SSR downlink
channel. Usually, DF−0 are filtered out by the AS 680 SPB hardware in order to minimise the pro-
cessing load for the SPC.
S DF−24 detection is based on the Mode S data block’s two most significant bits only (all other for-
mats are five bit data fields), so that it is quite likely to detect erroneous signals in DF−24.
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