Specification :

The 290 series uses Direct Digital Synthesis techniques as well as variable clock sampling technology to provide a fully featured programmable function and arbitrary waveform capability.

The 291, 292 and 294 are 100 MS/ s arbitrary waveform generators designed to handle real world requirements by test experts. These models can easily simulate complex signals while being easy to use, compact and affordable. On multi-channel units each channel can be operated fully independently, or multiple channels can be linked using simple or complex relationships.

Waveform Manager Plus software provides all the features needed for creation, manipulation and management of arbitrary waveforms within a single Windows based program.
Arbitrary Waveforms
Waveforms The maximum arbitrary waveform size is 1 M points. Up to 500 user-defined waveforms may be stored on the removable memory card. Arbitrary waveforms can be defined by front panel editing controls, by downloading of waveform data via RS-232, USB or GPIB, or by writing directly to the removable memory card using the USB card reader/ writer connected to a PC.

Waveform memory 1 M points. Minimum waveform size is 8 points.

Vertical resolution 12 bits

Sample clock range 100 mHz to 100 MHz

Resolution 4 digits

Accuracy ± 1 digit of setting

Output filter Selectable between 40 MHz Elliptic, 20 MHz Bessel or none

Sequence Up to 1024 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.

Noise function Digital noise generated by a 35-bit linear feedback register clocked at 100 MHz. User’ s external filter defines bandwidth and response

Standard Waveforms
Waveforms Sine, square, triangle, DC, positive ramp, negative ramp, sin( x) / x, pulse, pulse train, cosine, haversine and havercosine

Sine, Cosine, Haversine, Havercosine
Range 0.1 mHz to 40 MHz

Resolution 0.1 mHz or 10 digits

Accuracy Better than 10 ppm for 1 year

Temperature stability Typically < 1 ppm/ ° C

Output level 5 mV to 20 V p-p from 50 &

Harmonic distortion < 0.15 % THD to 100 kHz; < – 60 dBc to 20 kHz, < – 50 dBc to 1 MHz, < – 40 dBc to 10 MHz, < – 30 dBc to 40 MHz

Non-harmonic spurii < – 60 dBc to 1 MHz, < – 60 dBc + 6 dB/ octave 1 MHz to 40 MHz

Square
Range 1 mHz to 50 MHz

Resolution 1 mHz ( 4 digits)

Accuracy ± 1 digit of setting

Output level 5 mV to 20 V p-p from 50 &

Rise and fall times < 8 ns

Triangle
Range 0.1 mHz to 500 kHz

Resolution 0.1 mHz or 10 digits

Accuracy Better than 10 ppm for 1 year

Output level 5 mV to 20 V p-p from 50 & , linearity error: < 0.1 % to 30 kHz

Ramps and Sin( x) / x
Range 0.1 mHz to 500 kHz

Resolution 0.1 mHz or 10 digits

Accuracy Better than 10 ppm for 1 year

Output level 5 mV to 20 V p-p from 50 &

Linearity error < 0.1 % to 30 kHz

Pulse and Pulse Train
Output level 5 mV to 20 V p-p from 50 &

Rise and fall times < 8 ns

Period Range: 40 ns to 100 s; Resolution: 4-digits; Accuracy: ± 1 digit of setting

Delay Range: – 99.9 s to + 99.99 s; Resolution: 0.001 % of period or 10 ns

Width Range: 10 ns to 99.99 s; Resolution: 0.001 % of period or 10 ns

Trains of up to 10 pulses may be specified, each having independently defined width, delay and level. The baseline voltage is separately defined and the sequence 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 The smaller of 2.5 MHz or the maximum for the selected waveform. 100 Msamples/ s for ARB or Sequence.

Number of Cycles 1 to 1048575

Trigger rep. rate 0.005 Hz to 100 kHz internal, dc to 1 MHz external

Trigger source Internal from keyboard or trigger generator. External from TRIG IN or remote interface.

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 The smaller of 2.5 MHz or the maximum for the selected waveform. 80 Msamples/ s for ARB or Sequence.

Trigger rate 0.005 Hz to 100 kHz internal, dc to 1 MHz external

Gate signal source Internal from keyboard or trigger generator. External from TRIG IN or remote interface.

Start/ stop phase ± 360 ° settable with 0.1 ° resolution, subject to waveform frequency and type

Sweep Capability 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, continuous or triggered.

Sweep direction Up, down, up/ down or down/ up

Sweep range 1 mHz to 40 MHz in one range. Phase continuous. Independent setting of start/ stop frequency.
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Sweep time 1 ms to 999 s ( 3 digit resolution)

Marker Variable during sweep.

Sweep trig. 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 HOLD key

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

Carrier waveforms All waveforms bar pulse, pulse train, sequence

Frequency list Up to 16 frequencies from 1 mHz to 40 MHz

Trigger rep. 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 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.

External Amplitude Modulation
Carrier frequency Entire range for selected waveform

Carrier waveforms All standard and arbitrary waveforms

Modulation source Modulation socket

Frequency range DC to 500 kHz

Signal range Approx. 1 V pk-pk for 100 % level change at maximum output

External Signal Summing
Carrier frequency Entire range for selected waveform

Carrier waveforms All standard and arbitrary waveforms

Sum source Sum socket

Frequency range DC to 16 MHz

Signal range Approximately 2 Vpk-pk input for 20 Vpk-pk output.

Trigger Generator
Source Internal source 0.005 Hz to 100 kHz squarewave adjustable in 10 us steps. 3 digit resolution. Available for external use from the SYNC OUT socket.

Main Outputs – One for each channel
Output impedance 50 &

Amplitude 5 mV to 20 V pk-pk open circuit ( 2.5 mV to 10 V pk-pk into 50 & . Amplitude can be specified open circuit ( Hi Z) or into an assumed load of 50 & or 60 & , in Vpk-pk, Vrms or dBm.

Ampl. accuracy Better than 2 % ± 1 mV at 1 kHz into 50 & .

Ampl. flatness ± 0.2 dB to 1 MHz; ± 0.4 dB to 40 MHz

DC offset range ± 10 V. DC offset plus signal peak limited to ± 10 V from 50 & .

Offset accuracy Typically within ± 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 ( Arbitrary only) 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 synchronising burst or gated signals.

Sweep sync Outputs a pulse at the start of sweep to synchronise an oscilloscope or recorder. Can additionally output a sweep marker.

Phase lock out Used to phase lock two generators. Produces a positive edge at the 0o phase point.

Output signal level Logic level of 3 V for all outputs except Sweep Sync. Sweep Sync is a 3-level waveform.

Trig In
Frequency range DC to 1 MHz

Signal range Threshold nominally TTL level; max. input ± 10 V

Min. rulse width 50 ns for Trigger and Gate modes; 50 µ s for Sweep mode

Input impedance 10 k&

Modulation In
Frequency range DC to 500 kHz

Signal range VCA: Approximately 1 Vpk-pk for 100 % level change at maximum output
SCM: Approximately ± 1 Vpk for maximum output

Input impedance Typically 1 k&

Sum In
Frequency range DC to 30 MHz ( 291) DC to 16 MHz ( 292/ 294)

Signal range Approximately 2 Vpk-pk input for 20 Vpk-pk output

Input impedance Typically 1 k&

Hold Holds an arbitrary waveform at its current position. A TTL low level or switch closure causes the waveform to stop at the current position and wait until a TTL high level or switch opening which allows the waveform to continue. The front panel MAN/ HOLD key or remote command may also be used to control the Hold function.

Input impedance 10 k&

Ref Clock In/ Out
Set to input Input for an external 10 MHz reference clock. TTL/ CMOS threshold level.

Set to output Buffered version of the internal 10 MHz clock. Output levels nominally 1 V and 4 V from 50 & .

Set to phase lock Used together with SYNC OUT on a master and the TRIG IN on a slave to synchronize ( phase lock) two generators

ARB Clock In
Frequency Range DC to 50 MHz

Max. input voltage + 5 V, -1 V

Inter-Channel Operation
Inter-Channel Modulation The waveform from any channel may be used to Amplitude Modulate ( AM) or Suppressed Carrier Modulate ( SCM) the next channel. Alternatively any number of channels may be Modulated ( AM or SCM) with the signal at the MODULATION input socket.

Carrier frequency Entire range for selected waveform

Carrier waveforms All standard and arbitrary waveforms

Modulation types AM: Double sideband with carrier
SCM: Double sideband suppressed carrier

Modulation source Internal from the previous channel. External from Modulation input socket. The external modulation signal may be applied to any number of channels simultaneously

Frequency range DC to > 100 kHz

Internal AM depth 0 % to 105 %

Internal AM resolution 1 %

Carrier Suppression ( SCM) > 40 dB

External modulation signal range VCA: Approximately 1 V pk-pk for 100 % level change at maximum output
SCM: Approximately ± 1 Vpk for max. output

Inter-Channel Analogue Summing Waveform Summing sums the waveform from any channel into the next channel. Alternatively any number of channels may be summed with the signal at the SUM input socket.

Carrier frequency Entire range for selected waveform

Carrier waveforms All standard and arbitrary waveforms

Sum source Internal from the previous channel. External from SUM IN socket.

Frequency range DC to > 16 MHz

Ext. signal range Approx. 5 Vpk-pk input for 20 Vpk-pk output

Inter-Channel Phase Locking Two or more channels may be phase locked together. Each locked channel may be assigned a phase angle relative to the other locked channels. Arbitrary waveforms and waveform sequences may be phase locked but certain constraints apply to waveform lengths and clock frequency ratios.
With one channel assigned as the Master and other channels as Slaves a frequency change on the master will be repeated on each slave thus allowing multiphase waveforms at the same frequency to be easily generated. DDS waveforms are those with 7 digits of frequency setting resolution, while Non-DDS waveforms have 4 digits.

Phase resolution DDS waveforms: 0.1 degree

Non-DDS waveforms 0.1 degree or 360 degrees/ number of points whichever is the greater

Phase error < ± 10 ns all waveforms.

Inter-Channel Triggering Any channel can be triggered by the previous or next channel. The previous/ next connections can be used to ‘ daisy chain’ a trigger signal from a ‘ start’ channel, through a number of channels in the ‘ chain’ to an ‘ end’ channel.
Each channel receives the trigger out signal from the previous ( or next) channel, and drives its selected trigger out to the next ( or previous) channel. The ‘ end’ channel trigger out can be set up to drive the ‘ start’ channel, closing the loop.
In this way, complex and versatile interchannel trigger schemes may be set up. Each channel can have its trigger out and its output waveform set up independently. Trigger out may be selected from Waveform End, Position Markers, Sequence Sync or Burst Done.
Using the scheme above it is possible to create a sequence of up to 64 waveform segments, each channel producing up to 16 segments and all channels being summed to produce the complete waveform at the output of channel 4.
The signals from the REF IN/ OUT socket and the SYNC OUT socket can be used to phase lock two instruments where more than 4 channels are required.

Interfaces
RS-232 Variable Baud rate, 9600 Baud maximum

IEEE488 Conforms with IEEE488.2

USB Conforms with USB 1.1

General Specifications
Display 20 character x 4 row alphanumeric LCD

Data entry Keyboard selection of mode, waveform etc.; value entry by numeric keys or by rotary control.

Memory card Removable memory card conforming to the Compact Flash memory card standard. Sizes from 32 MB to 1 GB can be used.

Stored settings Up to 500 complete instrument set-ups may be stored and recalled from the memory card. Up to 500 arbitrary waveforms can also be stored independent of the instrument settings.

Size 130 mm ( 3U) high; 335 mm long; 350 mm wide ( 292/ 294) , 212 mm wide ( 291)

Weight 292/ 294: 7.2 kg ( 16 lb) ; 291: 4.1 kg ( 9 lb)

Power 110 to 120 V or 100 V nominal 50/ 60/ 400 Hz; 220 to 240 V nominal, 50/ 60 Hz. Voltage adjustable internally; operating range ± 10 % of nominal; 60 VA max. Installation Category II.

Compliance
Operating range + 5 ° C to 40 ° C, 20 to 80 % RH

Storage range – 20 ° C to + 60 ° C

Environmental Indoor use at altitudes to 200 m, Pollution Degree 2

Safety Complies with EN61010-1

EMC Complies with EN61326

Instrument drivers Labview and LabWindows CVI drivers are either supplied with the instrument or are available via your local Fluke Office

Supplied Items IEC Mains Lead. Printed manual ( partly multi-language) , multi-language manual on CD, Waveform Manager Plus software, compact Flash memory card, compact Flash card reader/ writer ( USB connection to PC)

Options 19-inch rack mounting kit