TOE 7741
Function Generator
Power function generator with integral feedback voltage protection
The outstanding feature of the TOE 7741 power function generator is its high power output of over 63 W (with rectangular waveforms).
This power is achieved at an output amplitude of 45 Vpp into 8 Ohm load. Since the output amplifier has an internal resistance of approx. 0 Ohm and is shielded by feedback voltage protection, any external voltages of up to 120 V will not destroy its output stage.
Furthermore, all front-panel inputs and outputs are no-load and short-circuit proof. The frequency settings are made using a decade switch, the frequency dial and the frequency offset potentiometer. The latter allows frequency settings with a reproducibility of < 0.1 %. The outstanding feature of this instrument is its frequency counter that can measure both internal and external signal frequencies.
The counter has an LED display. Besides the basic sine, triangle and square functions, the instrument generates positive and negative pulses and bipolar DC voltage, and can also be used as a broadband power amplifier for the range DC up to 100 kHz.
Special features
- Frequency range 1 mHz to 100 kHz
- High output power > 63 W into 8 Ohm
- Max. output amplitude 45 Vpp
- Output with feedback voltage protection
- Frequency counter up to 30 MHz
Functions and operating modes
| Functions | Sine, triangle, square, positive and negative pulses, broadband power amplifier, DC, variable symmetry |
| Operating modes | Free-running, external sweepfrequency control, amplifier mode, frequency counter |
Frequency characteristics
| Frequency range | 1 mHz to 100 kHz in 6 decadic subranges |
| Frequency offset | ± 2 % |
| Frequency error | ± 2 digits, 2 % of full-scale value when using the scale |
| Drift | 1 x 10-3/K, 5 x 10-3 in 8 hours, in each case following 30 min warm-up time |
Function output
| Output amplitude | Upp = 45 mV to 45 V, 22.5 mV to 22.5 V in pulse mode |
| Output impedance | Approx. 0 Ohm. The output is no-load and short-circuit proof |
| Feedback voltage protection | < 120 V |
| DC offset | 0 to ± 15 V |
| Output attenuator | 30 dB continuously adjustable plus 20 dB or 30 dB steps |
| Frequency response (sine, triangle) |
0.5 dB up to 100 kHz |
Function specification
| at max. output voltage into 8 Ohm load | |
| Sine | |
| Distortion factor | < 0.5 % up to 50 kHz, < 1 % up to 100 kHz |
| Triangle | |
| Linearity error | < 1 % up to 100 kHz |
| Symmetry error | < 1 % up to 100 kHz |
| Square | |
| Transition time | < 0,8 μs |
| Overshoots | ≤ 5 % |
| Pulse | See square |
| Symmetry variation | 10 % to 90 %, fmax 10 kHz |
| Amplifier | Approx. 20 dB gain, DC to approx. 100 kHz, distortion factor < 0.2 % up to 100 kHz, input impedance = 10 kOhm |
Other signal inputs and outputs
| Synchronization signal output | TTL-compatible, source impedance: 50 Ohm |
| Modulation input (VCO) | Approx. 5 V for frequency variation ratio of 1000:1, Ri = 10 kOhm |
| OCV output | 0 to 5 V output voltage for a frequency change 1:1000 |
| EXT IN | Amplifier input, max. input voltage 15 Vrms, Ri = 10 kOhm |
Frequency counter mode
| Frequency range | < 1 Hz to 30 MHz |
| Resolution | 4 or 5 digits with autoranging |
| Accuracy | ± 2 digits |
| Sensitivity | 150 mVrms 10 MHz 250 mVrms 10 MHz |
| Input impedance | 1 MOhm II 120 pF |
| Input protection | Up to 15 Vrms |
| Line voltage | 115 V / 230 V ± 10 %, 47 Hz to 63 Hz |
| Power consumption | 140 VA |
| Operating temperature | 0 °C bis 40 °C |
| Dimensions (W x H x D) | 265 x 147 x 480 mm |
| Gewicht | Approx. 7 kg |
| Housing | Aluminium |
Ordering data
| Power function generator | TOE 7741 |
Options
| TOE 9008 | Carrying handle |
| TOE 9501 | 19“ adapter, 3 HU |
| TOE 9503 | 19“ rack module, 4 HU |