The TRIGger subsystem configures the triggering that controls measurement acquisition.
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Recommendation: All triggered measurements should be made using an appropriate fixed manual range. That is, turn autorange off ([SENSe:]<function>:RANGe:AUTO OFF) or set a fixed range using the [SENSe:]<function>:RANGe, CONFigure, or MEASure command. |
Selects the number of triggers that are accepted by the instrument before returning to the "idle" trigger state.
| Parameter | Typical Return |
|---|---|
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1 to 1,000,000 (1x106) or continuous (INFinity). Default: 1. (34460A/61A) |
+1.00000000E+00 For a continuous trigger (INFinity), the query returns "9.9E37". |
| Return ten sets of five DC voltage measurements, using a positive-going external trigger to start each measurement set: CONF:VOLT:DC SAMP:COUN 5 TRIG:COUN 10 TRIG:SOUR EXT;SLOP POS READ? Typical Response: +1.00520000E+01, … (50 measurements) |
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Sets the delay between the trigger signal and the first measurement. This may be useful in applications where you want to allow the input to settle before taking a measurement or for pacing a burst of measurements.
Selecting a specific trigger delay disables the automatic trigger delay (TRIGger:DELay:AUTO OFF).
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For AC measurements (voltage or current), there is a relationship between the bandwidth setting ([SENSe:]VOLTage:AC:BANDwidth or [SENSe:]CURRent:AC:BANDwidth) and the default trigger delay setting. This delay ensures that there is sufficient settling time for the AC measurement. See Automatic Trigger Delays for further information. |
| Parameter | Typical Return |
|---|---|
| 0 to ~3600 seconds (~1 µs steps). Default: 1 s. Step size for DC measurements is approximately 1 µs. |
+2.00000806E+00 |
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Return five DC voltage measurements. There is a 2 second delay before each measurement. CONF:VOLT:DC 10 Typical Response: +4.27230000E+00,+4.27150000E+00,+4.27190000E+00,+4.27170000E+00,+4.27200000E+00 |
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Disables or enables automatic trigger delay. If enabled, the instrument determines the delay based on function, range, and integration time or bandwidth.
| Parameter | Typical Return |
|---|---|
| {ON|1|OFF|0}. Default: ON. | 0 (OFF) or 1 (ON) |
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Return 5 DC voltage measurements, with an automatic delay between each measurement. CONF:VOLT:DC 10 Typical Response: +4.27230000E+00,+4.27150000E+00,+4.27190000E+00,+4.27170000E+00,+4.27200000E+00 |
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Sets the level on which a trigger occurs when level triggering is enabled (TRIGger:SOURce set to INTernal).
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It is recommended that all triggered measurements be made using an appropriate fixed manual range. That is, turn autorange off (SENSe:<function>:RANGe:AUTO OFF), or set a fixed range using the SENSe:<function>:RANGe, CONFigure, or MEASure command. |
| Parameter | Typical Return |
|---|---|
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<level> (see bullet points below). Default: 0. |
+2.00000000E+01 |
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Configures dc voltage measurements, 1 V range, 0.1 mV resolution. Select internal trigger source. Set the trigger level to 0.75 volts, positive slope. INIT puts the instrument in the "wait for trigger" mode. CONF:VOLT:DC 1,0.0001 |
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| Measurement Function | Range/Input Terminals |
<level> Parameter Value |
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| DCV |
100 mV to 100 V ranges, fixed range |
±120% of range |
| 1000 V range, fixed range | ±1000 V | |
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Autorange |
±1000 V | |
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DCI |
3 A terminals, fixed range |
±120% of range |
| 3 A terminals, autorange | ±3.6 A | |
| 10 A terminals | ±12 A | |
| RESistance/FRESistance | All ranges, fixed range | 0 to +120% of range |
| Autorange | 0 to +1.2 GΩ | |
| ACV | 100 mV to 100 V ranges, fixed range | 0 to +120% of range |
| 750 V range, fixed range | 0 to +1000 V | |
| Autorange | 0 to +1000 V | |
| ACI | 3 A terminals, fixed range | 0 to +120% of range |
| 3 A terminals, autorange | 0 to +3.6 A | |
| 10 A terminals | 0 to +12 A | |
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FREQuency |
*N/A | 3 Hz to 300 kHz |
| PERiod | *N/A | 3.33333333 µs to 0.333333333 s |
*N/A = Not Applicable.
Selects whether the instrument uses the rising edge (POS) or the falling edge (NEG) of the trigger signal on the rear-panel Ext Trig BNC connector when external triggering is selected; or the rising or falling edge of the input signal when level triggering is selected (level triggering applies only to the 34465A and 34470A).
| Parameter | Typical Return |
|---|---|
| {POSitive|NEGative}. Default: NEG | POS or NEG |
| Return ten sets of five DC voltage measurements, using a positive-going external trigger to start each measurement set: CONF:VOLT:DC SAMP:COUN 5 TRIG:COUN 10 TRIG:SOUR EXT;SLOP POS READ? Typical Response: +1.00520000E+01, … (50 measurements) |
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Selects the trigger source for measurements.
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It is recommended that all triggered measurements be made using an appropriate fixed manual range. That is, turn autorange off (SENSe:<function>:RANGe:AUTO OFF), or set a fixed range using the SENSe:<function>:RANGe, CONFigure, or MEASure command. |
| Source | Description |
|---|---|
| IMMediate | The trigger signal is always present. When you place the instrument in the "wait-for-trigger" state, the trigger is issued immediately. |
| BUS | The instrument is triggered by *TRG over the remote interface once the DMM is in the "wait-for-trigger" state. |
| EXTernal | The instrument accepts hardware triggers applied to the rear-panel Ext Trig input and takes the specified number of measurements (SAMPle:COUNt), each time a TTL pulse specified by OUTPut:TRIGger:SLOPe is received. If the instrument receives an external trigger before it is ready, it buffers one trigger. |
| INTernal | The INTernal source is available for the 34465A and 34470A with the DIG option only, and provides level triggering capability. To trigger on a level on the input signal, select INTernal for the source, and set the level and slope with the TRIGger:LEVel and TRIGger:SLOPe commands. |
| Parameter | Typical Return |
|---|---|
| {IMMediate|EXTernal|BUS|INTernal}. Default: IMMediate. | IMM, EXT, or BUS |
| Return ten sets of five DC voltage measurements, using a positive-going external trigger to start each measurement set: CONF:VOLT:DC SAMP:COUN 5 TRIG:COUN 10 TRIG:SOUR EXT;SLOP POS READ? Typical Response: +1.00520000E+01, … (50 measurements) |
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