externaly triggered burst mode doesn't work

[Laurent]

Dear All,

another issue for you: As the INF (or -1) command does not work in for "rp_GenBurstRepetitions" or "SOUR1:BURS:NOR" scpi (cf. viewtopic.php?f=14&t=1475), I try to use bust mode with an external trigger working on DIO0. An external generator is connect to DIO0 and triggers the burst at a frequency FB. Here is the generator setup in c:

Code: Select all

rp_GenReset();
rp_GenMode(RP_CH_1, RP_GEN_MODE_BURST);
rp_GenWaveform(RP_CH_1, RP_WAVEFORM_SINE);
rp_GenFreq(RP_CH_1, 5000000);
rp_GenBurstCount(RP_CH_1, 1);
rp_GenBurstRepetitions(RP_CH_1, 1);
rp_GenAmp(RP_CH_1, 0.5);
rp_GenBurstPeriod(RP_CH_1, 100);
rp_GenTriggerSource(RP_CH_1, RP_GEN_TRIG_SRC_EXT_PE);
usleep(100);
rp_GenOutEnable(RP_CH_1);

It works well for a frequency FB lower than 1.9996 kHz. Then, some bursts are missed. Any clue?

[Nils Roos]

Hi Laurent,

there is a trigger dead time of about 0.5ms on the circuit for external trigger - same as with the scope. After an external trigger was recognized, triggering is disabled for this timespan. The purpose is to suppress spurious trigger events from eg. mechanical switches. Unfortunately it is not configurable.