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Power function generator
with integral feedback voltage protection, 63 W - TOE 7741

Overview

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

Technical data

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

General data

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

Order informations + Options


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

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