Agilent Technologies ESG Spezifikationen Seite 198

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3-16 Programming Guide
Remote Data Transfer ESG Family Signal Generators
User File Data Downloads
Event 1 output is set to 0 or 1 depending on the sync out selection, which enables the Event
1 output at either the beginning of the frame, beginning of a specific timeslot, or at all
timeslots.
Because timeslots are configured and enabled within the signal generator, a user file can
be individually assigned to one or more timeslots. A timeslot cannot have more than one
data source (PN sequence or user file) specified for it. The amount of user file data that can
be mapped into hardware memory depends on both the amount of PRAM available on the
baseband generator, and the number and size of each frame. The amount of PRAM
required for a framed transmission is:
PRAM required = size of timeslot
× timeslots per frame × number of frames
and
size of timeslot = bits per timeslot
number of frames = frames per multiframe
× muliframes per superframe
For example, to generate a superframe for GSM:
= 156.25
× 8 × 26 × 51
= 1,657,5000 bytes.
The 1 Mbyte memory available with Option UN8 is not sufficient for this application.
Option UN9 with 8 Mbytes is required.
Multiple User Files Selected as Data Sources for Different Timeslots
If two or more user files are selected for a framed transmission, the amount of PRAM
required is determined by the user file that generates the largest number of frames. In
order to generate continuously repeating data patterns, each user file must be long enough
to completely fill an integer number of timeslots. In addition, all user files must meet the
1 5 781 - 936
0/1 (don’t care)
00
1 6 937 - 1092
0/1 (don’t care)
00
1 7 1093 - 1249
0/1 (don’t care)
00
2 0 1250 - 1405
0/1 (don’t care)
00
2 1 (on) 1406 - 1561
42 bits set by GSM standard &
remaining 114 bits of user file
1 (on) 0
2 2 through 6 1562 - 2342
0/1 (don’t care)
0 0 (off)
2 7 2343 - 2499
0/1 (don’t care)
00
(1 in address
2499 only)
Table 3-1 PRAM Bit Definitions for GSM Normal Channel Transmission with
a User File Data Source (Continued)
Frame Timeslot PRAM
Address
Data Bits Burst Bits Pattern
Reset Bit
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