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312 Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide
Creating and Downloading User-Data Files
Pattern RAM (PRAM) Data Downloads (E4438C and E8267D)
Viewing the PRAM Waveform
After the waveform data is written to PRAM, the data pattern can be viewed using an oscilloscope.
There is approximately a 12-symbol delay between a state change in the burst bit and the
corresponding effect at the RF out. This delay varies with symbol rate and filter settings, and
requires compensation to advance the burst bit in the downloaded PRAM file.
Table 8-6 PRAM Byte Patterns and Bit Positions
Bit Function
Pattern Reset
EVENT 1 Output
Reserved (Bit = 0)
Reserved (Bit = 1)
Reserved (Bit = 0)
Burst
Reserved (Bit = 0)
Data
Bit
Pattern
Decimal
Value
Bit Position76543210 ---
Bit Pattern 11010101 213
11010100 212
11010001 209
11010000 208
10010101 149
10010001 145
10010000 144
01010101 85
01010100 84
01010001 81
01010000 80
00010101 21
00010100 20
00010001 17
00010000 16