This section describes the minimum times supported when generating two or more pulses in a pattern.
Only three timing constraints must be met when generating two or more pulses:
The End Time after the last pulse must meet the minimum requirement. This period is used to re-align the marker signal to the I/Q waveform data.
The total signal period must be an integer multiple of the Arb waveform granularity as discussed for the Single Pulse configuration.
|
PSG/ESG Arb |
= 10 ns |
|
MXG B |
= 5 ns |
|
EXG B |
= 6.7 ns |
|
M8190A |
= 12 ns |
|
N8241A/N6030A/M9330A |
= 6.4 ns |
The total signal period up to the end time must be greater than the specified minimum. The individual times can be set to anything including zero. The actual time resolution is dependent on the Arb sampling rate.
This means that except for the very last PRI, all of the pulse on times, pulse edge times, and pulse off times, are generated with a time resolution equal to the Arb sample period. The on times, edge times and off times can be set to zero. Setting the pulse PRI time equal to the pulse on time makes the pulse off time equal to zero and two pulses will touch each other. The last PRI is rounded to insure that the Arb waveform granularity requirement is met.
|
|
Signal Period |
End Time |
Off Time |
|---|---|---|---|
|
PSG (100 MHz) |
610 ns |
130 ns |
0 ns |
|
MXG B (200 MHz) |
310 ns |
130 ns |
0 ns |
|
N8241A/N6030A/M9330A (1.25 GHz) |
150 ns |
140 ns |
0 ns |
|
M8190A (4 GHz) |
125 ns |
120 ns |
0 ns |
|
PRI |
Pulse Repetition Interval |
|
PW |
Pulse Width (100% Amplitude Time) |
|
RT |
Rise Time (0-100% Amplitude Time) |
|
FT |
Fall Time (100-0% Amplitude Time) |
|
On Time |
(RT + PW + FT) |
|
Off Time |
(PRI – On Time) Applies to all pulses except the last pulse in a pattern. |
|
End Time |
(PRI – On Time) Only applies to the last pulse in a Pattern. |
When the Pulse shape is Custom Profile or Custom I/Q, the rising edge and falling edge times are assumed to be zero. The pulse On Time is equal to the Custom Profile or Custom I/Q data.