HP ESG-D Series, Руководство пользователя

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7-15
Operation
Userfile Applications
Example 2
In the following example, the data bytes are in ASCII.
MMEM:DATA "NEWDATAFILE1",#21012&A%4D789
"NEWDATAFILE1"
the file name
2
defines the number of numeric digits to follow in
B
. After the
#
,
this number points to the double digit
10
which defines the
number of bytes of modulation data. (This variable is repre-
sented by
A
in the sample command line.)
10
reserves the 10 data digits (
12&A%4D789
) that indicate the
bytes (in ASCII) that are stored in the modulation data (
C
). This
variable is represented by
B
in the sample command line.
12&A%4D789
the digital modulation data in ASCII. This variable is repre-
sented by
C
in the sample command line.
NOTE: A userfile must contain enough data to fill the entire field(s) for which it is
selected. If a user file containing a data pattern with less than the required number
of bits is selected, the resulting signal will not be usable. For example, if you want
to fill the data field (E) of a normal GSM burst, the userfile must contain at least
114 bits of data (see the table below). If the data is downloaded using ASCII char-
acters (which represent one byte of data per character), you must enter 15 bytes of
data. The six least-significant bits of the 15th byte will be truncated.
B
C
A
Standard Burst Type Bits Required Data Required in Bytes
NADC Up TCH 260 33; 4 LSBs of 33rd byte
are truncated.
GSM Normal Burst 114 15; 6 LSBs of 33rd byte
are truncated.
PDC Up TCH 224 28
PHS TCH 160 20
DECT Traffic Bearer 320 40
TETRA Uplink Normal 432 54