Agilent Technologies FS2010 Manual de servicio descargar pdf (Pagina 348)

340 Agilent Signal Generators Programming Guide

Creating and Downloading User–Data Files

Pattern RAM (PRAM) Data Downloads (E4438C and E8267D)

As seen in Table 6- 9, only four bits, shown in the following list, can change state:

•bit 0—data

•bit 2—bursting

• bit 6—EVENT 1 rear panel output

• bit 7—pattern reset

Because a PRAM byte has only four bits that can change states, there are only 15 possible byte

patterns as shown in Table 6- 10. The table also shows the decimal value for each pattern, which is

needed for downloading data using the list format shown on page 344.

1 Reserved 0 Always 0

2 Burst 0/1 1 = RF on

0 = RF off

For non–bursted, non–TDMA systems, to have a continuous signal, set this bit to 1 for all

bytes. For framed data, set this bit to 1 for on timeslots and 0 for off timeslots.

3 Reserved 0 Always 0

4 Reserved 1 Always 1

5 Reserved 0 Always 0

6EVENT1

Output

0/1 To have the signal generator output a single pulse at the EVENT 1 connector, set this bit

to 1. Use this output for functions such as a triggering external hardware to indicate when

the data pattern begins and restarts, or creating a data–synchronous pulse train by

toggling this bit in alternate bytes.

7 Pattern Reset 0/1 0 = continue to next sequential memory address.

1 = end of memory and restart memory playback.

This bit is set to 0 for all bytes except the last byte of PRAM. To restart the pattern, set

the last byte of PRAM to 1.

Tab l e 6-9 PR AM D a t a B y te

Bit Function Value Comments

1 2 ... 343 344 345 346 347 348 349 350 351 352 353 ... 395 396

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Agilent Technologies FS2010 Manual de servicio Pagina 348