A unique pulse means that no other pulse has exactly the same parameters or data. Each pulse in the pulse library is a unique pulse. A pulse used in a pattern library twice can result in two unique pulses in the Arb memory when the frequency offset, phase offset, or power scale values are set differently. Using pulse width jitter results in a number of unique pulses equal to the repetition count in the Pattern library. When an Antenna Scan is applied to a single pulse, the number of unique pulses loaded into memory can be 650 or more.
For Arbs that do not have sequencing by address and do not have a waveform granularity of 1, (M8190A, N6030A, N8241A, and M9330A), additional unique pulses may be created during downloads. These pulses are derived from existing pulses and are padded at the beginning or end with off time samples to preserve one sample point timing resolution of the signal.
The PSG, MXG, EXG, and ESG support sequencing by address so the number of unique pulses is equal to the sequence size divided by two.
The maximum number of unique pulses is as follows:
|
PSG Arb |
= 16384 |
(Set by the sequence memory size) |
|
ESG Arb |
= 16384 |
(Set by the sequence memory size) |
|
MXG B |
= 2 M |
(Requires option N5182B-022 or N5182B-023) |
|
EXG B |
= 2 M |
(Requires option N5172B-021 or N5172B-022) |
|
M8190A |
= 262144 |
(Requires option M8190A-SEQ) |
|
N8241A |
= 32768 |
(Set by the waveform segment directory size) |
|
N6030A |
= 32768 |
(Set by the waveform segment directory size) |
|
M9330A |
= 32768 |
(Set by the waveform segment directory size) |
The N8241A, N6030A, and M9330A Arbs have a sequence memory of 1 million packets. This means that while the Arb may only hold 32k unique pulses (waveform segments), the sequence can re-use these pulses for a signal containing 512k pulses (sequence size/2).