Agilent-technologies N5183A MXG Manual de usuario descargar pdf (Pagina 316)

306 Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide

Creating and Downloading User-Data Files

User File Data (Bit/Binary) Downloads (E4438C and E8267D)

Figure 8-2 Mapping User File Data to a Single Timeslot

NOTE Compliant with the GSM standard, which specifies 156.25- bit timeslots, the signal generator

uses 156- bit timeslots and adds an extra guard bit to every fourth timeslot.

For this protocol configuration, the signal generator’s firmware loads PRAM with the bits defined in

the following table. (These bits are part of the 32- bit word per frame bit.) The Pattern Reset bit, bit

7, is 0 for frame one and 1 for the last byte of frame two.

Frame Timeslot PRAM Word

Offset

Data Bits Burst Bits Pattern Reset Bit

1 0 0 - 155 0/1 (don’t care) 0 (off) 0 (off)

1 1 (on) 156 - 311 set by GSM standard (42 bits) & first

114 bits of user file

1 (on) 0

1 2 312 - 467 0/1 (don’t care) 0 0

1 3 468 - 624 0/1 (don’t care) 0 0

1 4 625 - 780 0/1 (don’t care) 0 0

1 5 781 - 936 0/1 (don’t care) 0 0

1 6 937 - 1092 0/1 (don’t care) 0 0

1 7 1093 - 1249 0/1 (don’t care) 0 0

2 0 1250 - 1405 0/1 (don’t care) 0 0

2 1 (on) 1406 - 1561 set by GSM standard (42 bits) &

remaining 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) 0 1 (1 in offset

2499 only)

1 2 ... 311 312 313 314 315 316 317 318 319 320 321 ... 365 366

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Agilent-technologies N5183A MXG Manual de usuario Pagina 316