GBAS/SCAT-I Mode (Options R&S
EVSG-K4/-K5)
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EVSG1000
211
User Manual 1178.6227.02 ─ 06
6.5.6.2
Loop Type
Repeats the included elements for a given number of times;
Table 6-24: Mandatory subelements
Name
Description
<NUM>
Only for type
loop
:
Reference to the element (
<data_content_short>
) whose value
determines the number of processing repetitions
<loop>
Only for type
loop
:
Subprocess containing further elements to be processed within a loop
Example:
Abbreviated example for a loop over the MT1-satellites:
<Element>
<data_content>Measurement Block</data_content>
<data_content_short>MSG_BLK</data_content_short>
<type>loop</type>
<NUM>NOF_M</NUM>
<Loop>
<Element>
<data_content>Ranging Source ID</data_content>
<data_content_short>Z_COUNT</data_content_short>
<bits_used>8</bits_used>
<type>unsigned</type>
<resolution>1</resolution>
</Element>
<Element>
<data_content>Issue of Data (IOD)</data_content>
... </Element>
</Loop>
</Element>
6.5.6.3
While Type
Repeats the included elements while there are enough bits left to proceed;
Table 6-25: Mandatory subelements
Name
Description
<BitsLeft>
Number of bits required at the end of the loop to perform the next cycle
(1 required); otherwise loop is finished
<TrLen>
Previous element that contains the transmission length in bit. Sometimes
the transmission length is provided in bytes; in this case, make sure the
resolution of that previous element is set to 8 to convert its value to bits
<TrStart>
Previous element at which the transmission length begins to count bits
<loop>
Subprocess containing further elements to be processed within a loop
Message XML Interface
