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Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 203
Creating and Downloading Waveform Files
Waveform Memory
Volatile and Non-Volatile Memory (N5182A)
Volatile Memory and Non-Volatile Memory (E4438C and E8267D Only)
NOTE When considering volatile memory, it is not necessary to keep track of marker data, as this
memory is consumed automatically and proportionally to the I/Q data created (i.e. 1 marker
byte for every 4 bytes of I/Q data).
On the E4438C and E8267D, the fixed file system overhead on the signal generator is used to store
directory information. When calculating the available volatile memory for waveform files it is
important to consider the fixed file system overhead for the volatile memory of your signal generator.
Table 5-4 N5182A Volatile (BBG) and Non-Volatile (Internal Storage and USB Media) Memory
Volatile (BBG) Memory Non-Volatile (Internal Storage and USB
Media) Memory
Option Size Option Size
N5182A
a
a.On the N5182A, 512 bytes is reserved for each waveform’s header file (i.e. The largest waveform that could be
played with a N5182A with Option 019 (320 MB) is: 320 MB – 512 = 319,999,488 MB.)
651/652/654 (BBG) 8 MSa (40 MB) Standard (N5182A) 100 MSa (512 MB)
019 64 MSa (320 MB) USB memory stick user determined
Table 5-5 Fixed File System Overhead
Volatile (WFM1) Memory and Fixed File Overhead
Option Size Maximum
Number of
Files
(MaxNumFiles)
Memory (Bytes) Used for
Fixed File System
Overhead
a
[16 + (44 x MaxNumFiles)]
a.The expression [16 + [44 x MaxNumFiles]) has been rounded up to nearest memory block (1024 bytes). (To find the I/Q waveform sample
size, this resulting value needs to be divided by 4.)
Memory Available
for Waveform
Samples
E4438C and E8267D
001, 601 (BBG) 8 MSa (40 MB) 1024 46,080 8,377,088 Samples
002 (BBG) 32 MSa (160 MB) 4096 181,248 33,509,120 Samples
602 (BBG) 64 MSa (320 MB) 8192 361,472 67,018,496 Samples