TOE 7761
Arbitrary Function Generator
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 RS232 adapter
The included PC Software allows for 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 1,000,000 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 |
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 < 1 % 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 ±2 % ±10 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 ±2% ±10 mV into 50 Ω |
|
Main output |
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 ° resolution 0.01 Hz to 1 MHz, accuracy ± 0.002 % < 10 MHz (DDS-Signal), < 20 MHz (arbitrary) > 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 VPP for 100 % modulation |
| Frequency modulation Internal External |
|
| 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 |
| 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 | 100 V to 240 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
| Arbitrary function generator | TOE 7761 |