Agilent Technologies 53230A Guia do Utilizador descarregar pdf (Página 176)

176 53220A/53230A User’s Guide

5 Triggering and Gating

[SENSe:]FREQuency:BURSt:GATE:TIME {<time>|MINimum|

MAXimum|DEFault}

[SENSe:]FREQuency:BURSt:GATE:TIME? [{MINimum|MAXimum|

DEFault}] (query form)

[SENSe:]FREQuency:BURSt:GATE:DELay {<delay>|MINimum|

MAXimum DEFault}

[SENSe:]FREQuency:BURSt:GATE:DELay? [{MINimum|MAXimum|

DEFault}] (query form)

- time sets the gate time for measuring the pulse burst carrier frequency. For

accurate results, the gate window (open/close) must be within the threshold

detector’s (-6 dB, -12 dB) sensitivity range. The range for time is

1 µs to 100s with 10 ns resolution.

Following a reset (*RST) or instrument preset (SYSTem:PRESet or Preset

key), the gate time is set to 1 µs.

- delay sets the gate delay at the start of the measurement. The delay starts

when the input level reaches the detector threshold (-6 dB, -12 dB) set by the

INPut3:BURSt:LEVel command. The delay range is 0s to 10s, with 10 ns

resolution.

Following a reset (*RST) or instrument preset (SYSTem:PRESet or Preset

key), the delay is set to 0.0s.

Carrier Frequency Configuration Example

The following example shows a typical configuration for a burst carrier fre-

quency measurement. In the example, the gate delay and gate time are set

manually. If the characteristics of the pulse are unknown, the “on time” can be

measured separately to insure that the delay and time are set within the

threshold detector’s sensitivity range (see Chapter 3 for more pulse measure-

ment examples).

// measure the on time of the burst to determine

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Agilent Technologies 53230A Guia do Utilizador Página 176