How to Use the Burst Function of HDG6000B?

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Waveform Frequency

The waveform frequency defines the repetition rate of the burst waveform in the triggered and external

gated modes. In the triggered mode, the number of cycles specified by the burst count is output at the

waveform frequency. In the external gated mode, the waveform frequency is output when the external

gate signal is true.

Keep in mind that the waveform frequency is different than the “burst period” which specifies the interval

between bursts (triggered mode only).

– Waveform frequency: 1 mHz to 200 MHz (HDG6202B) (limited to 200 kHz for ramp waveforms). The

default waveform frequency is 1kHz. (For an internally triggered burst waveform, the minimum frequency

is 2.001 mHz.) You can select a sine, square, or ramp waveform (pulse, noise, dc, and arbitrary waveforms

are not allowed).

– For sine and square waveforms, frequencies above 3 MHz are allowed only with an “infinite” burst count.

– Front-Panel Operation: To set the waveform frequency, press the Freq softkey for the selected function.

Then use the knob or numeric keypad to enter the desired frequency.

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Burst Count

The burst count defines the number of cycles to be output per burst. Used in the triggered burst mode

only (internal or external source).

? Burst count: 1 to 2, 000, 000, 000 cycles, in 1 cycle increments. You can also select an infinite burst

count. The default is 1 cycle.

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? When the Internal trigger source is selected, the specified number of cycles is output continuously at

a rate determined by the burst period setting. The burst period defines the interval between bursts.

? When the Internal trigger source is selected, the burst count must be less than the product of the burst

period and the waveform frequency as shown below.

Burst Count < Burst Period X Waveform Frequency

? The function generator will automatically increase the burst period up to its maximum value to

accommodate the specified burst count (but the waveform frequency will not be changed).

? When the gated burst mode is selected, the burst count is ignored.

? Front-Panel Operation: To set the burst count, press the N Cycles softkey and then use the

knob or numeric keypad to enter the count.

To select an infinite count burst instead, press the Inf Cycles softkey.

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Burst Period

The burst period defines time from the start of one burst to the start of the next burst. Used in the internal

triggered burst mode only.

Keep in mind that burst period is different than the “waveform frequency” which specifies the frequency of

the bursted signal.

? Burst period: 2 ?s to 500 seconds. The default is 10 ms.

? The burst period setting is used only when Internal triggering is enabled. The burst period is ignored when

manual or external triggering is enabled (or when the gated burst mode is selected).

? It is not possible to specify a burst period which is too short for the function generator to output with the

specified burst count and frequency (see below). If the burst period is too short, the function generator

will automatically adjust it as needed to continuously

re-trigger the burst.

Burst Period > Burst Count ÷ Waveform Frequency + 200 ns

? Front-Panel Operation: To set the burst period, press the Period softkey and then use the knob or numeric

keypad to enter the period.

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Burst Phase

The burst phase defines the starting phase of the burst.

? Burst phase: 0 degrees to 360 degrees. The default is 0 degrees.

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? When the Internal trigger source is selected, the specified number of cycles is output continuously at

a rate determined by the burst period setting. The burst period defines the interval between bursts.

? When the Internal trigger source is selected, the burst count must be less than the product of the burst

period and the waveform frequency as shown below.

Burst Count < Burst Period X Waveform Frequency

? The function generator will automatically increase the burst period up to its maximum value to accommodate

the specified burst count (but the waveform frequency will not be changed).

? When the gated burst mode is selected, the burst count is ignored.

? Front-Panel Operation: To set the burst count, press the N Cycles softkey and then use the knob or numeric

keypad to enter the count.

To select an infinite count burst instead, press the Inf Cycles softkey.

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Burst Period

The burst period defines time from the start of one burst to the start of the next burst. Used in the

internal triggered burst mode only.

Keep in mind that burst period is different than the “waveform frequency” which specifies the

requency of the bursted signal.

? Burst period: 2 ?s to 500 seconds. The default is 10 ms.

? The burst period setting is used only when Internal triggering is enabled. The burst period is

ignored when manual or external triggering is enabled (or when the gated burst mode is selected).

? It is not possible to specify a burst period which is too short for the function generator to output

with the specified burst count and frequency (see below). If the burst period is too short, the function

generator will automatically adjust it as needed to continuously

re-trigger the burst.

Burst Period > Burst Count ÷ Waveform Frequency + 200 ns

? Front-Panel Operation: To set the burst period, press the Period softkey and then use the knob or

numeric keypad to enter the period.

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Burst Phase

The burst phase defines the starting phase of the burst.

? Burst phase: 0 degrees to 360 degrees. The default is 0 degrees.

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? From the front panel, the starting phase is always displayed in degrees (radians are not available).

? For sine, square, and ramp waveforms, 0 degrees is the point at which the waveform crosses zero

volts (or the dc offset value) in a positive - going direction. For arbitrary waveforms, 0 degrees is the

first waveform point downloaded to memory. The burst phase has no effect on pulse or noise waveforms.

? The burst phase is also used in the gated burst mode. When the gate signal goes false, the current

waveform cycle is completed and then the function generator stops. The output will remain at the

voltage level corresponding to the starting burst phase.

? Front-Panel Operation: To set the burst phase, press the Phase softkey and then use the knob or

numeric keypad to enter the desired phase in degrees.

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Burst Trigger Source

In the triggered burst mode, the function generator outputs a burst with the specified number of cycles

(burst count) each time a trigger is received. After the specified number of cycles have been output,

the function generator stops and waits for the next trigger. At power-on, the internally-triggered burst

mode is enabled.

? Burst trigger source: Internal, External, or Manual. The default is Internal.

? When the Internal (immediate) source is selected, the frequency at which the burst is generated is

determined by the burst period.

? When the External source is selected, the function generator will accept a hardware trigger applied to

the front-panel Sync/Mod/Trig connector. The function generator outputs the specified number of cycles

each time Sync/Mod/Trig receives a TTL pulse with the specified polarity. External trigger signals that

occur during a burst are ignored.

? When the Manual source is selected, the function generator outputs one burst each time the front-panel

Trigger key is pressed.

? When the External or Manual trigger source is selected, the burst count and burst phase remain in effect

but the burst period is ignored.

? Front-Panel Operation: Press the Source softkey to select the desired source . To specify whether the

function generator triggers on the rising or falling edge of the signal on the Sync/Mod/Trig connector,

select the desired edge by pressing the Slope softkey.