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Arbitrary function generator, 40 MHz - TOE 7761

Overview

The TOE 7761 arbitrary function generator uses the direct digital synthesis (DDS) technique to create sine waves of high quality and accuracy. Square waveforms are provided with fast rise and fall times. The sampling rate of up to 80 MS/s can be controlled by an external clock.
Arbitrary signals can have up to 1 000 000 sampling points with a resolution of 14 bits, thus allowing a very good simulation of natural signals. A wide range of integral standard waveforms, such as sine, triangle, square, ramp, etc., simplifies the creation of new arbitrary waveforms.
The output amplitude can be set to a maximum of 20 Vpp (10 Vpp into 50 Ω) with offsets of up to ±10 V (±5 V into 50 Ω ). Various triggered modes with an internal or external trigger source allow generation of an exact number of userdefined cycles. Various modulation and sweep options round off the instrument functions.

A 10 MHz external clock reference lets you synchronize the unit for precise phase adjustment.
Operation is easy and convenient with the graphic LCD and a multifunction spinwheel. All functions can be configured with just a few inputs. It is additionally possible to save up to 50 instrument configurations in a non-volatile memory

Special features
- 1 μHz to 40 MHz sine and square waveforms
- Output amplitude up to 20 Vss
- 80 MS/s sampling rate with arbitrary waveforms with 14 bit resolution and up to 1 000 000 sampling points
- Flash memory for 1 000 000 sampling points
- Many standard waveforms assist in creating arbitrary waveforms
- Various modulation and sweep options
- 50 instrument configurations can be stored
- Remote control via USB-1), GPIB- and RS-232 interface

1) USB via supplied RS-232 adapter

Arbitrary function

The included PC software Arbsoft allows easy creation, editing and downloading of complex waveforms. Multiple waveforms can be stored in the flash memory of the instrument ready for execution.

Arbitrary characteristics
Resolution  
horizontal Up to 1.000000 points
Vertical 14 bits (- 8191 to + 8191) 
Sampling 12.5 ns/point to 100 s/point (80 MS/s max.) with 4 digits or 0.1 ns resolution
Accuracy 0,002 % (20 ppm)
Predefined waveforms Sine, triangle, square, noise, ramp up and down, Sin(x)/x, exponential rise and fall, Gaussian pulse

Technical data

Frequency characteristics
Sine 1 μHz to 40 MHz 
Square 1 μHz to 40 MHz 
riangle 1 μHz bis 5 MHz
Pulse 0,5 mHz to 10 MHz
Accuracy 0,002 % (20 ppm)
Resolution 12 digits oder 1 μHz
Waveform characteristics
Sine
Harmonic distortion



Signal distortion
(non-harmonic)

DC to 20 kHz -65 dBc
20 kHz bis 100 kHz -60 dBc
100 kHz bis 5 MHz -45 dBc
5 MHz bis 40 MHz -30 dBc

DC to 1 MHz < -60 dBc
Triangle
Variable symmetry

10 % to 90 %
Square
Transition times
Duty cycle
            < 10 MHz 
            < 30 MHz
            < 40 MHz
Symmetry error
Overshoots

< 8 ns at full amplitude into 50 Ω

20 % to 80 %, ±1 % max.
40 % to 60 %, ±5 % max.
50 % fixed
< 0,5 % at 50 % duty cycle
Typ. < 3% of output amplitude ± 50 mV
Pulse
Pulse width
Overshoots

> 50 ns or 0,0001 % of repetition rate
Typ. < 3 % of output amplitude ± 50 mV 
Output characteristics
Amplitude
Range
Resolution
Units
Accuracy
Linearity

20 mVpp to 20 Vpp max., 10 mVpp bis 10 Vpp an 50 Ω
3 digits or 10 mV
Vpp, Vrms, dBm
±1 % ±20 mV of the set value at 1 V tos 10 V
0,1 dB to 1 MHz, 1.5 dB to 40 MHz
Offset
Range
Resolution
Accuracy

Up to ±9,99 V max., up to ±4,99 V into 50 Ω, depending on the set amplitude
3 digits or 10 mV
±1% ±10 mV into 50 Ω

Main output
Impendance
Filter
Output protection


50 Ω
9th order elliptic filter and 5th order Bessel filter
Short-circuit proof and resistant to external voltage up to ±15 V.
The output is automatically disconnected in event of overload.
Operating modes
Continuous
Trigger

Gate

Burst

Continuous output signal with the set parameters
Output retains last value of last waveform until a trigger event arrives, and exactly one complete waveform is subsequently output with the programmed parameters
Like trigger mode except that the output signal is generated for the duration of the gate signal. The last started cycle is completed.
Like trigger mode except with a programmed number of 2 to 999 999 cycles.
Trigger characteristics
Source
Start phase
Repetition rate
            internal
            external
Pulse width


Internal, external, manual or remote-controlled interface
-360° to + 360° with 0,1 ° esolution

0,01 Hz to 1 MHz, accuracy ± 0,002 %
< 10 MHz (DDS-Signal), < 20 MHz (arbiträr)
> 20 ns, (TTL)
Modulation characteristics
Amplitude modulation
Internal
External

0,01 Hz to 20 kHz sine, square or triangle, variable modulation from 0 % bis 100 %
5 Vss for 100 % modulation
Frequency modulation
Internal
External

 
0,01 Hz to 20 kHz sine, square or triangle, variable modulation from 0 % bis 100 %
5 Vpp for 100 % change in frequency

FSK
Clock rate Internal
External1)

0,01 Hz to 1 MHz
TTL-Signal, max. 1 MHz
1) External FSK modulation uses Trigger In. Specifications subject to change without notice


Sweep characteristics

Characteristic

Sweep time
Trigger
Linear up, down, up and down
Logarithmic up or down
10 ms to 500 s
Internal or external, all trigger modes
Inputs and outputs
Summing In

Modulation In
The analog input signal can be added to the output signal.
5 Vpp for full-scale output, bandwidth: DC to > 10 MHz, impedance 500 Ω
5 Vpp für 100 % modulation, bandwidth: DC to > 50 kHz, Impedance 10 kΩ
Trigger In
Reference In
Reference Out
Marker Out
Sync Out
TTL compatible, max. 20 MHz, pulse width > 20 ns, impedance 10 kΩ
10-MHz square signal for device synchronization, TTL compatible, input impedance 1 kΩ
10-MHz square signal or arbitrary clock for device synchronization, TTL compatible, impedance 50 Ω
Positive TTL pulse as marker for arbitrary signals, freely-programmable, impedance 50 Ω
Positive TTL pulses synchronous with the output frequency, impedance 50 Ω

General data

Configuration memory 50 instrument settings, including last setting
Arbitrary memory 1 000 000 points in internal flash memory
Remote-controlled interfaces IEEE 488.2 (GPIB), RS 232 (115 kB max.), USB1),SCPI compatible
Dimensions (W x H x D)
With feet
224 x 88 x 357 mm
224 x 104 x 357 mm
Weight 3,2 kg
Power supply 90 V to 264 V, 47 to 63 Hz, < 40 VA max.
Humidity Up to 95 %, O °C to 30 °C 
Operating temperature O °C to +50 °C
Storage temperature -20 °C to + 70 °C 
Emitted noise; In accordance with EN 55011, Class B
Noise immunity In accordance with EN 55082-2
Device safety In accordance with EN 61010-1, CE labeled
1) USB via supplied RS-232 adapter

Order informations + Options

Arbitrary function generator TOE 7761

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