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280 系列波形发生器

产品编号：3031384 更新时间：2020-08-15

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280 系列波形发生器

Specifications apply at 18-28 ºC after 30 minutes warm-up, at maximum output into 50 Ω.

Arbitrary Waveforms

Waveforms

Maximum waveform size is 65,536 points; minimum waveform size is 4 points. Up to 100 user defined waveforms may be stored in the 256 K point nonvolatile RAM. Waveforms can be defined by front panel editing controls or by downloading of waveform data via RS-232 or GPIB.

Waveform memory

64 k points per channel

Vertical resolution

12 bits

Sample clock

100 mHz to 40 MHz

Resolution

4 digits

Accuracy

± 1 digit of setting

Sequencing

Up to 16 waveforms may be linked. Each waveform can have a loop count of up to 32,768. A sequence of waveforms can be looped up to 1,048,575 times or run continuously.

Output filter

Selectable between 16 MHz Elliptic, 10 MHz Elliptic, 10 MHz Bessel or none

Standard Waveforms

All Waveforms

Accuracy

10 ppm for 1 year

Temp. stability

Typically < 1 ppm/ºC.

Output level

2.5 mV to 10 Vpp into 50 Ω

Sine, Cosine, Haversine, Havercosine

Range

0.1 mHz to 16 MHz

Resolution

0.1 mHz or 7 digits

Harmonic distortion

	< 0.1 % THD to 100 kHz;
	< –65 dBc to 20 kHz,
	< –50 dBc to 300 kHz,
	< –35 dBc to 10 MHz
	< –30 dBc to 16 MHz

Nonharmonic spurii

	< –65 dBc to 1 MHz,
	< –65 dBc + 6 dB/octave 1 MHz to 16 MHz

Square

Range

1 mHz to 16 MHz

Resolution

1 mHz (4 digits)

Accuracy

± 1 digit of setting

Rise/fall times

< 25 ns

Pulse and Pulse Train

Rise/fall times

< 25 ns

Period range

100 ns to 100 s

Period resolution

4 digit

Accuracy

± 1 digit of setting

Delay range

–99.99 s to + 99.99 s

Delay resolution

0.002 % of period or 25 ns, whichever is greater

Width range

25 ns to 99.99 s

Width resolution

0.002 % of period or 25 ns, whichever is greater

Triangle

Range

0.1 mHz to 100 kHz

Resolution

0.1 mHz or 7 digits

Linearity error

< 0.1 % to 30 kHz

Ramps and Sin(x)/x

Range

0.1 mHz to 100 kHz

Resolution

0.1 mHz (7 digits)

Linearity error

0.1 % to 30 kHz

Note: The pulse width and absolute value of the delay may not exceed the pulse period at any time. Repetition rate is set by the pulse train period.

Operating Modes

Continuous

Waveform runs continuously

Triggered Burst

Each active edge of the trigger signal will produce one burst of the waveform

Carrier waveforms

All standard and arbitrary

Max. Carrier Frequency

40 Msamples/s for ARB and Sequence. 1 MHz or the maximum for the selected waveform.

Number of cycles

1 to 1,048,575

Trigger repetition

0.005 Hz to 100 kHz internal dc to 1 MHz external

Trigger signal source

Internal from keyboard, previous channel, next channel or trigger generator. External from TRIG IN or remote interface.

Trigger start/stop phase

± 360 ° settable with 0.1 ° resolution, subject to waveform frequency and type

Gated

Waveform will run while the Gate signal is true and stop while false

Carrier waveforms

All standard and arbitrary

Max. carrier frequency

40 Msamples/s for ARB and Sequence. 1 MHz or the maximum for the selected waveform.

Number of cycles

1 to 1,048,575

Trigger repetition

0.005 Hz to 100 kHz internal dc to 1 MHz external

Gate signal source

Internal from keyboard, previous channel, next channel or trigger generator. External from TRIG IN or remote interface.

Gate start/stop phase

± 360 ° settable with 0.1 ° resolution, subject to waveform frequency and type

Sweep

Frequency sweep capability is provided for both standard and arbitrary waveforms. Arbitrary waveforms are expanded or condensed to exactly 4096 points and DDS techniques are used to perform the sweep.

Carrier waveforms

All standard and arbitrary except pulse, pulse train and sequence

Sweep mode

Linear or logarithmic, triggered or continuous

Sweep direction

Up, down, up/down or down/up

Sweep range

From 1 mHz to 16 MHz in one range. Phase continuous. Independent setting of the start and stop frequency.

Sweep time

30 ms to 999 s

Marker

Variable during sweep

Sweep trigger source

The sweep may be free run or triggered from the following sources: Manually from keyboard. Externally from TRIG IN input or remote interface.

Sweep hold

Sweep can be held and restarted by the HOLD key

Multi channel sweep

Any number of channels may be swept simultaneously but the sweep parameters will be the same for all channels. Amplitude, Offset and Waveform can be set independently for each channel.

Tone Switching

Capability provided for both standard and arbitrary waveforms. Arbitrary waveforms are expanded or condensed to exactly 4096 points and DDS techniques are used to allow instantaneous frequency switching.

Carrier waveforms

All except pulse, pulse train and sequence

Frequency list

Up to 16 frequencies from 1 mHz to 10 MHz

Trigger repetition rate

0.005 Hz to 100 kHz internal. DC to 1 MHz external. Usable repetition rate and waveform frequency depend on the tone switching mode.

Source

Internal from keyboard, previous channel, next channel or trigger generator. External from TRIG IN or remote interface.

Tone switching modes

Gated

The tone is output while the trigger signal is true and stopped, at the end of the current waveform cycle, while the trigger signal is false. The next tone is output when the trigger signal is true again.

Triggered

The tone is output when the trigger signal goes true and the next tone is output, at the end of the current waveform cycle, when the trigger signal goes true again.

FSK

The tone is output when the trigger signal goes true and the next tone is output, immediately, when the trigger signal goes true again. Using 2 channels with their outputs summed together it is possible to generate DTMF test signals.

Trigger Generator

Internal source 0.005 Hz to 100 kHz square wave adjustable in 10 us steps. 3-digit resolution. Available for external use from any SYNCOUT socket.

Outputs

Main Outputs – One for each channel

Output impedance

50 Ω

Amplitude

5 mV to 20 Vpp open circuit (2.5 mV to 10 Vpp into 50 Ω). Amplitude can be specified open circuit (hi Z) or into an assumed load of 50 Ω or 600 Ω Vpkpk, Vrms or dBm.

Amplitude accuracy

2 % ± 1 mV at 1 kHz into 50 Ω

Amplitude flatness

± 0.2 dB to 200 kHz; ± 1 dB to 10 MHz; ± 2.5 dB to 16 MHz

DC offset range

± 10 V from 50 Ω. Offset plus signal peak limited to ± 10 V

DC offset accuracy

Typically 3 % ± 10 mV, unattenuated

Resolution

3 digits or 1 mV for both amplitude and dc offset

Sync Out – One for each channel

Multifunction output user definable or automatically selected to be any of the following:

Waveform sync (all waveforms)

A square wave with 50 % duty cycle at the main waveform frequency, or a pulse coincident with the first few points of an arbitrary waveform

Position markers

Any point(s) on the waveform may have associated marker bit(s) set high or low

Burst done

Produces a pulse coincident with the last cycle of a burst.

Sequence sync

Produces a pulse coincident with the end of a waveform sequence.

Trigger

Selects the current trigger signal. Useful for synchronizing burst or gated signals.

Sweep sync

Outputs a pulse at the start of sweep to synchronize an oscilloscope or recorder.

Phase lock out

Used to phase lock two generators. Produces a positive edge at the 0 ° phase point.

Output signal level

TTL/CMOS logic levels from typically 50 Ω.

Cursor/marker out

	Adjustable output pulse for use as a marker in sweep mode or as a cursor in arbitrary waveform editing mode. Can be used to modulate the Z axis of an oscilloscope or be displayed on a second ‘scope channel.
	Output Signal Level: Adjustable from nominally 2 V to 14 V, normal or inverted; adjustable width as a cursor.

Output impedance

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