Boonton 4500B Peak Power Meter Manual do Utilizador descarregar pdf (Página 116)

Boonton 4500B RF Peak Power Analyzer

Operation

4-44

Table 4-9. Trig > Menu (continued)

Menu Item Function

(Type) Selections ((SCPI cmd)

Auto Pk-Pk performs the same function as

Auto and, in addition, automatically sets the

trigger level based on the peak-to-peak

amplitude of the signal. For many signals

this will provide a fully automatic trigger

system. For slow rate signals and complex

level patterns, it may not produce the desired

display. Use Normal mode if this occurs.

Normal mode uses only the user specified

trigger conditions. No automatic actions

are taken.

Free Run generates horizontal sweep without

regard to trigger conditions. This mode is

useful for locating low duty-cycle events

visually.

TRIGger:MODE {AUTOPKPK, AUTO,

NORMAL, FREERUN}

Trig Source Pulse, Mod & Stat* Selects internal or external triggering

(Mult. Choice) CH1, CH2,

Ext Trig1, Ext Trig2 Only one main trigger (A trigger) source is

needed to capture data on a single or

dual-channel instrument. The trigger source

can be a measurement channel (internal

trigger), Channel 1 or Channel 2 (dual

channel models only), or the external trigger

channel associated with each measurement

channel, Trigger 1 or Trigger 2 (dual channel

models only).

Specifications for the trigger source are

provided in Section 1.6, Table1-2. Internal

triggering occurs when the level of the Fig 4-27b. Trig > menu

measurement channel signal crosses the Pulse mode; Auto Pk/Pk

specified trigger level in the direction

(positive-going or negative-going) indicated by the slope selection.

External triggering occurs when the level of the signal applied at the

Trigger 1 or Trigger 2 input reaches the trigger level on the selected

slope of the waveform. The selected triggering source is always active

and will generate triggers even if the source channel is turned off

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