{"id":1904,"date":"2013-06-13T13:18:40","date_gmt":"2013-06-13T04:18:40","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=1904"},"modified":"2023-03-20T17:11:47","modified_gmt":"2023-03-20T08:11:47","slug":"msa500technicalreport2e","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/tech\/technology\/msa500technicalreport2e.html","title":{"rendered":"Operation and Examples of Trigger Function"},"content":{"rendered":"

MSA500 series Signal Analyzer offers strong trigger functions on real-time mode.
\nOn this document, the way to operate and some examp les are introduced. <\/p>\n

\n\n

Trigger Source Selection<\/h2>\n

At first the trigger source described below should be selected when the trigger function is used.<\/p>\n\n\n\n\n\n\n
Free Run:<\/th>\nThe waveform is updated without any condition.<\/td>\n<\/tr>\n
IF Level<\/th>\nTrigger condition is defined as the ratio between the instantaneous signal level and the full scale of IF signal path.
\nIf the signal level exceeds the trigger level, the waveform is updated.<\/td>\n<\/tr>\n
Power<\/th>\nTrigger condition is defined as t he total power within the span. Trigger level is described as the relative value ag ainst the reference level. When the trigger slope is set to \"RISE\", if the sig nal power exceeds the trigger level, the waveform is updated.
\nWhen the trigger slope is set to \"FALL\", if the sign al power is lower than the trigger level, the waveform is updated.<\/td>\n<\/tr>\n
Channel Power<\/th>\nTrigger condition is defined as the total power within the channel. The span is divided into 5 then each piece is defined as the channel.
\nTrigger level is described as the relative value against the reference level.
\nThe trigger slope setting works as same as Power trigger.<\/td>\n<\/tr>\n
External<\/th>\nTrigger condition is defined as the external trigger input voltage. When the trigger slope is set to \"RISE\", if the inp ut level exceeds the fixed threshold (0.56V), the waveform is updated.
\nWhen the trigger slope is set to \"FALL\", if the input level is lower than the fixed threshold(0.56V), the waveform is updated.<\/td>\n<\/tr>\n<\/tbody><\/table>\n

The comparison table is shown in below. Please refer to the table at section 7<\/a> for the sample time.<\/p>\n\n\n\n\n\n\n\n
Trigger Source<\/th>\nTime Resolution<\/th>\nSlope<\/th>\nLevel Range<\/th>\n<\/tr>\n
IF Lever<\/td>\n14.7ns<\/td>\nRISE only<\/td>\n1 to 100 %\uff081% Step\uff09<\/td>\n<\/tr>\n
Power<\/td>\n1sample<\/td>\nRISE\/FALL<\/td>\n-40 to 0 dB\uff081dBStep\uff09<\/td>\n<\/tr>\n
Channel Power<\/td>\n5sample<\/td>\nRISE\/FALL<\/td>\n-40 to 0 dB\uff081dBStep\uff09<\/td>\n<\/tr>\n
External<\/td>\n14.7ns<\/td>\nRISE\/FALL<\/td>\n0.56V Fixed<\/td>\n<\/tr>\n<\/tbody><\/table>\n\n\n

Pre-Trigger Setting<\/h2>\n

Pre-Trigger defines how many data is captured before the trigger event.<\/p>\n

It is available to choose 0\/25\/50\/75\/100%.<\/p>\n\"Pre-Trigger\n

Trigger Slope Setting<\/h2>\n

This is the choice of the trigger slope \"RISE\" or \" FALL\". Please refer to \"1\"<\/a> for the operation.<\/p>\n

Scan Setting<\/h2>\n

This is the choice of the waveform update is one ti me (Single) or repeatable (Continuous). <\/p>\n

Trigger Level Setting<\/h2>\n\n\n\n\n
IF Level<\/th>\nSet as the ratio against the ful l-scale. 1 to 100% at 1% step. <\/td>\n<\/tr>\n
Power<\/th>\nSet as the relative value against the ref\nerence level. 0 to \u201340dB at 1dB step. <\/td>\n<\/tr>\n
Channel Power<\/th>\nSet as the relative value against the reference level.
\n0 to \u201340 dB at 1 dB step.<\/td>\n<\/tr>\n<\/tbody><\/table>\n

Trigger Channel Setting<\/h2>\n\n\n
Channnel Power<\/th>\nChoice of the one of 5 channels to be used as the trigger source.
\n1 is the lowest frequency, 3 is the center and 5 is\n the highest frequency.<\/td>\n<\/tr>\n<\/tbody><\/table>\n\"Trigger\n\n

Acquisition Frame Setting<\/h2>\n

It sets the acquisition length as the frame count.<\/p>\n

The setting menu is available with pressing \"OPERATION MODE\" button.<\/p>\n

Press \"ACQ FRAME\" (F3) then set the frame count by the encoder. <\/p>\n

\"ENC STEP\"(F6) offers the step size setting of the encoder. <\/p>\n

1frame consists of 1024 sample on time domain.<\/p>\n

Sample\/Frame time and maximum acquisition time depe nds on the span setting as follows.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Span<\/th>\nSample Time<\/th>\nFrame Time<\/th>\nMaximum Acquisition Time<\/th>\n<\/tr>\n
20MHz<\/td>\n29.4ns<\/td>\n30.1us<\/td>\n0.4935s<\/td>\n<\/tr>\n
10MHz<\/td>\n58.8ns<\/td>\n60.2us<\/td>\n0.9869s<\/td>\n<\/tr>\n
5MHz<\/td>\n118ns<\/td>\n121us<\/td>\n1.973s<\/td>\n<\/tr>\n
2MHz<\/td>\n294ns<\/td>\n301us<\/td>\n4.935s<\/td>\n<\/tr>\n
1MHz<\/td>\n588ns<\/td>\n602us<\/td>\n9.869s<\/td>\n<\/tr>\n
500kHz<\/td>\n1.18us<\/td>\n1.21ms<\/td>\n19.73s<\/td>\n<\/tr>\n
200kHz<\/td>\n2.94us<\/td>\n3.01ms<\/td>\n49.35s<\/td>\n<\/tr>\n
100kHz<\/td>\n5.88us<\/td>\n6.02ms<\/td>\n98.69s<\/td>\n<\/tr>\n
50kHz<\/td>\n11.8us<\/td>\n12.1ms<\/td>\n197.3s<\/td>\n<\/tr>\n
20kHz<\/td>\n29.4us<\/td>\n30.1ms<\/td>\n493.5s<\/td>\n<\/tr>\n<\/tbody><\/table>\n\n

Main Analysis Setting<\/h2>\n

Main Analysis can be set on the menu of \"ANALYSIS M AIN\"(F1) under \"OPERATION MODE\" key.<\/p>\n\n\n\n\n\n
Spectrum<\/th>\n Spectrum Analysis is set. Analysis frame count is fixed to 1. <\/td>\n<\/tr>\n
Spectrogram<\/th>\nSpectrogram Analysis is set.<\/td>\n<\/tr>\n
Overwrite<\/th>\n Overwrite Analysis is set.
\nTrigger source is fi xed to Free Run. <\/td>\n<\/tr>\n
Time Domain<\/th>\nTime Domain Analysis is set. Further selection is sh own in below.\n