Description: | Set or return the terminal count (sample population size) in millions of samples for Statistical Mode acquisition. When the terminal count is reached, the CCDF is considered “complete”, and the instrument will halt acquisition if INITiate:CONTinuous is set to OFF. If INITiate:CONTinuous is ON, sample acquisition will continue in the manner specified by the TRIGger:CDF:DECImate setting. |
Syntax: | TRIGger:CDF:COUNt <numeric_value> |
Argument: | <numeric_value> = 1 to 4000 |
Valid Modes: | Statistical Mode only. |
Description: | Set or return the termination action when running continuously in Statistical Mode. This action occurs when the terminal count is reached (as defined by TRIGger:CDF:COUNt) or the terminal running time is reached (as defined by TRIGger:CDF:TIMe). |
Syntax: | TRIGger:CDF:DECImate <DECIMATE, RESTART, STOP> |
Argument: | <Boolean> = { DECIMATE, RESTART, STOP } |
Valid Modes: | Statistical Mode only |
Description: | Set or return the terminal running time in seconds for Statistical Mode acquisition. When the terminal time is reached, the CCDF is considered “complete”, and the instrument will halt acquisition if INITiate:CONTinuous is set to OFF. If INITiate:CONTinuous is ON, sample acquisition will continue in the manner specified by the TRIGger:CDF:DECImate setting. |
Syntax: | TRIGger:CDF:TIMe <numeric_value> |
Argument: | <numeric_value> = 1 to 3600 |
Valid Modes: | Statistical Mode only |
Description: | Set or return the trigger delay time in seconds with respect to the trigger for the trigger display location in the LEFT position. Positive values cause the actual trigger to occur after the trigger condition is met. This places the trigger event to the left of the trigger point on the display, and is useful for viewing events during a pulse, some fixed delay time after the rising edge trigger. Negative trigger delay places the trigger event to the right of the trigger point on the display, and is useful for looking at events before the trigger edge. |
Syntax: | TRIGger:DELay <numeric_value> |
Argument: | <numeric value> -378e-3 to 1250e-3, range varies with timebase setting |
Valid Modes: | Pulse mode only |
Description: | Set or return the trigger holdoff time in seconds. Trigger holdoff is used to disable the trigger for a specified amount of time after each trigger event. The holdoff time starts immediately after each valid trigger edge, and will not permit any new triggers until the time has expired. When the holdoff time is up, the trigger re-arms, and the next valid trigger event (edge) will cause a new sweep. This feature is used to help synchronize the power meter with burst waveforms such as a TDMA or GSM frame. The trigger holdoff resolution is 10 nanoseconds, and it should be set to a time that is just slightly shorter than the frame repetition interval. |
Syntax: | TRIGger:HOLDoff <numeric_value> |
Argument: | <numeric_value> = 0.0 to 1.0 seconds in 10e-9 increments, 0.0 = no holdoff |
Valid Modes: | Pulse mode only |
Description: | Set or return the trigger level for synchronizing data acquisition with a pulsed input signal or external trigger pulses. The internal trigger level entered should include any global offset and will also be affected by the frequency cal factor. The available internal trigger level range is sensor dependent. For internal trigger sources, the trigger level is set and returned in dBm. The external trigger is set and returned in volts. Note that there is a small amount of hysteresis built into the trigger system, and the signal should have at least one dB greater swing in each direction past the trigger level setting, and somewhat more at low levels. Note that explicitly setting the trigger level while TRIGger:MODe is set to AUTOPKPK will cancel the AUTOPKPK setting, and force the trigger mode back to AUTO. In AUTOPKPK the Trigger Level menu will display “AUTO LEVEL”. |
Syntax: | TRIGger:LEVel <numeric_value> |
Argument: | <numeric_value> = –40.0 to +20 (plus offset, if any) (internal trigger sources) <numeric_value> = +/-5.0 (external trigger) |
Valid Modes: | Pulse mode only |
Description: | Set or return the trigger mode for synchronizing data acquisition with pulsed signals. NORM mode will cause a sweep to be triggered each time the power level crosses the preset trigger level in the direction specified by TRIGger:SLOPe. If there are no edges that cross this level, no data acquisition will occur. AUTO mode operates in much the same way as NORM mode, but will automatically generate a trace if no trigger edges are detected for a period of time (100 to 500 milliseconds, depending on timebase). This will keep the trace updating even if the pulse edges stop. The AUTOPKPK mode operates the same as AUTO mode, but will adjust the trigger level to halfway between the highest and lowest power or voltage levels detected. This aids in maintaining synchronization with a pulse signal of varying level. Note that a setting of PKTOPK will be overridden and forced back to AUTO if a TRIGger:LEVel is set. The FREERUN mode force traces at a high rate to assist in locating the signal. |
Syntax: | TRIGger:MODE <character data> |
Argument: | <character data> = {AUTO, AUTOPKPK, NORMAL, FREERUN} |
Valid Modes: | Pulse mode only |
Description: | Set or return the position of the trigger event on displayed sweep. Assuming zero trigger delay, setting the position to LEFT causes the entire trace to be post-trigger. Setting it to RIGHT causes the entire trace to be pre-trigger. And setting to MIDDLE will display both the pre- and post- trigger portions of the trace. Note that the TRIGger:DELay setting is in addition to this setting, and will cause the trigger position to appear in a different location. Setting the trigger position places the ML2439A in trigger position mode, which overrides the variable vernier settings of the TRIGger:VERNier command. |
Syntax: | TRIGger:POSition <character data> |
Argument: | <character data> = {LEFT, MIDDLE, RIGHT} |
Valid Modes: | Pulse mode only |
Description: | Set or return the trigger slope or polarity. When set to POS, trigger events will be generated when a signal’s rising edge crosses the trigger level threshold. When NEG, trigger events are generated on the falling edge of the pulse. |
Syntax: | TRIGger:SLOPe <character data> |
Argument: | <character data> = {NEG, POS} |
Valid Modes: | Pulse mode only |
Description: | Set or return the trigger source used for synchronizing data acquisition. The CH1 and CH2 (2 channel ML2439A) settings use the signal from the associated sensor. EXT setting uses the signal applied to the rear panel TRIG IN connector. |
Syntax: | TRIGger:SOURce <character data> |
Argument: | <character data> = {CH1, CH2, CH3, CH4, IND, EXT} |
Valid Modes: | Pulse mode only |
Description: | Set or return the fine position of the trigger event on displayed sweep. The position is given in divisions relative to the left edge of the screen, so with zero trigger delay, setting the vernier control to 0.0 causes the entire trace to be post-trigger. Setting it to 10.0 causes the entire trace to be pre-trigger. And setting to 5.0 will display both the pre- and post-trigger portions of the trace. Note that the TRIGger:DELay setting is in addition to this setting, and will cause the trigger position to appear in a different location. Setting the trigger vernier places the ML2439A in trigger vernier mode, which overrides the fixed “Left, Middle, Right” settings of the TRIGger:POSition command. |
Syntax: | TRIGger:VERNier <numeric_value> |
Argument: | <numeric_value> = –30.0 to 30.0 |
Valid Modes: | Pulse mode only |