BM:INTernal:RATE {<frequency>|MINimum|MAXimum}
Set the burst rate for internally triggered bursts. The burst rate
frequency defines the interval between bursts. Select from 10 mHz to
50 kHz. The default is 100 Hz.
MIN = 10 mHz. MAX = 50 kHz.
[ Stored in volatile memory ]
The burst rate setting is used only when internal triggering is
enabled (triggered mode). The burst rate is ignored when single
triggering or external triggering is enabled.
It is possible to specify a burst rate which is too fast for the function
generator to output with the specified carrier frequency and burst
count. If the burst rate is too high, the function generator will
internally adjust it as needed to continuously re-trigger the burst.
The adjustment is handled internally by the function generator
(the burst rate displayed or queried will be the same as specified).
BM:INTernal:RATE? [MINimum|MAXimum]
Query the burst rate. Returns a value in hertz.
BM:SOURce {INTernal|EXTernal}
Select the burst modulation source. In the external gated burst mode,
the output waveform is either “on” or “off ” based on the level of the
external signal applied to the rear-panel Ext Trig terminal. The default
is INT. [ Stored in volatile memory ]
When the internal burst source is selected, the external gated mode
is disabled.
When the external gate source is selected, the output is enabled or
disabled based on the logic level of the gate signal applied to the
Ext Trig terminal. When the gate signal is true (
TTL high),
the function generator outputs a continuous waveform. When the
gate signal is false (
TTL low), the output is turned off (zero volts or
the dc offset level).
When the external gate source is selected, the burst count, burst rate,
burst phase, and burst trigger source are ignored (these parameters
are used for the triggered burst mode only).
BM:SOURce?
Query the present burst modulation source. Returns “
INT” or “EXT”.
Chapter 4 Remote Interface Reference
Burst Modulation Commands
164
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