TOE 7704 to TOE 7711
Function Generators
The function generators of the TOE 7700 range represent a series of completely novel design.
In addition to the usual standard signal shapes including variable signal symmetry, this range is equipped with a lin/ log sweep oscillator which should satisfy the most demanding users. Continuous or triggered sweeping is selectable, the lower and upper sweep limits are of course separately adjustable, and the sweep frequencies are precisely displayed by an integral frequency counter.
Many details reflect the latest advances in circuit technology: a wear-free spinwheel for adjusting the output frequency and sweep time, an internally or externally usable frequency counter that employs a reciprocal counting method, and sophisticated new switching techniques allow signal qualities that were previously unattainable.
All inputs and outputs are floating, with the most important ones arranged on the front panel for ease of operation. A wide frequency range, an outstanding processing quality, and the clear and balanced design of the control panel round off the concept of these function generators.
The TOE 7706, TOE 7708 and TOE 7711/7711 models also offer signal triggering and gate mode.
The TOE 7711/7711 microprocessorcontrolled synthesizers/function generators combine the variety of functions that characterize universal function generators with the stability of modern synthesizers. In PLL mode, the output frequency is controlled with crystal accuracy in the 10 Hz to 44 MHz range. The basic accuracy is 2 x 10-6 of the full-scale value, and the aging rate is only 2 ppm/year.
Special features
- Frequency range 1 mHz to 44 MHz
- Sweep, trigger, gate
- Variable symmetry
- Digital display of frequency, sweep, AC, DC
- Frequency counter up to 50 MHz
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| Variable symmetry with triangle and square |
| TOE 7704 | TOE 7706 | TOE 7707 | TOE 7711 | |
| Frequenz Min (mHz) Max (MHz) |
1 12 |
1 12 |
1 22 |
1 44 |
| Synthesizer | • | |||
| Frequenz counter | • | • | • | • |
| Signal waveforms | ||||
| Sine, triangle, square | • | • | • | • |
| Pos./neg. Pulse | • | • | • | • |
| TTL, ECL | • | • | • | • |
| Output (Vpp) | > 30 V | > 30 V | > 20 V | > 20 V |
| Operating modes | ||||
| Trigger/gate | • | • | ||
| Lin/log Sweep | • | • | • | • |
| VCO, external | • | • | • | • |
| Amplitude modulation |
Functions and operating modes
| Functions | Sine, triangle, square, pos./neg. pulse, TTL, ECL, variable symmetry, DC |
| Operating modes | Continuous, internal and external sweep-frequency control, amplifier mode, frequency counter |
| Trigger and gate modes | TOE 7706, TOE 7711 |
| Synthesizer mode (PLL) | TOE 7711 |
| Frequency characteristics | |
| Frequency range | |
| TOE 7704, TOE 7706 | 1 mHz to 12 MHz (sine, triangle, square, pulse, TTL, ECL) |
| TOE 7707 | 1 mHz to 22 MHz (sine, triangle, square, pulse, TTL, ECL) |
| TOE 7711 | 1 mHz to 44 MHz (pulse, TTL, ECL) 1 mHz to 22 MHz (sine, triangle, square) |
| Resolution | 3 ½ digits, 4 ½ digits in PLL mode |
| Frequency error | ± 1 LSD, 2 x 10-6 in PLL mode, 5 % of full-scale value 1 mHz bis 10 Hz |
| Drift | 5 x 10-8/K, 2 ppm/year in PLL mode, 10-3/K < 1 MHz, 3 x 10-3/K > 1 mHz, 5 x 10-3/ 8h free-running; in each case following 30 min warm-up time |
| Function output Output amplitude |
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| TOE 7704, TOE 7706 | 10 mVpp to 30 Vpp, 5 mVpp to 15 Vpp in pulse mode (open output) |
| TOE 7707, TOE 7711 | 7 mVpp to 20 Vpp, 3 mVpp to 10 Vpp in pulse mode (open output) |
|
Output impedance |
50 ohms/600 ohms (switchable), the output is short-circuit and no-load proof |
| Feedback voltage protection | up to ± 120 V (optional) |
| DC offset | 0 V to ± 10 V |
| Output attenuator | 30 dB continuously adjustable plus 20 dB, 40 dB fixed attenuator (max. 70 dB) |
| Accurancy | ±5 % (at max. amplitude; at 1 kHz for sine and triangle) |
| Drift | ± 0,05 % of full-scale value within 10 min ± 0,3 % of full-scale value within 8 hours |
| Frequency response | |
| Sine | ± 0,5 dB, ± 2 dB above 1 MHz |
| Triangle | ± 0,5 % dB, ± 2,5 dB above 1 MHz |
| Display | The output voltage is displayed in Vpp or in ± V (for DC). The max. error is ± 5 % of full-scale. Function specification at max. output voltage and Zo = ZL = 50 ohms |
| Reference temperature | 23 °C ± 1 °C |
| Sine | |
| Distortion factor | ≤ 0,5 % up to 100 kHz, all harmonics are 26 dB below the fundamental wave up to 12 MHz (TOE 7704, TOE 7706), or up to 22 MHz (TOE 7707, TOE 7708 A, TOE 7711,TOE 7711 A) |
| Triangle | Linearity and symmetry error ≤ 1 % up to 100 kHz |
| Square / Pulse | Transition time (10 % bis 90 %) typ. 10 ns Overshoots < 5 % |
| TTL OUT | |
| Output level | 0 V/5 V (typ) |
| tr/tf | ≤ 5 ns, output impedance Zo = 50 ohms, load impedance ZL ≥ 50 ohms |
| ECL OUT | |
| Output level | - 0,9 V/-1,8 V (typ) |
| tr/tf | ≤ 2 ns, output impedance 50 ohms, load impedance ≥ 50 ohms |
| Variable symmetry | Continuously adjustable from 10 % to 90 % |
| All functions | |
| fmax | 1.2 MHz (TOE 7704, TOE 7706) |
| fmax | 2.2 MHz (TOE 7707, TOE 7711, TOE 7711 A) |
| DC voltage | 3 ranges with Zo = 50 Ohm/600 Ohm, 0V to ± 0,1 V, 0V to ± 1 V, 0V to ± 10 V |
| Operating modes | |
| TOE 7704, TOE 7707 | Sweep, amplifier mode, frequency counter, VCO |
| TOE 7707, TOE 7711 | Sweep, amplifier mode, trigger and gate modes, synthesizer mode (PLL with TOE 7711, TOE 7711 A), frequency counter |
| Sweep mode | All functions, lin/log, rising, falling, continuously adjustable for internal and external trigger, hold, reset |
| TOE 7704, TOE 7706 | 1 mHz to 12 MHz |
| TOE 7707, TOE 7711 | 1 mHz to 22 MHz |
| Sweep time | 1 ms to 1000 s |
| Resolution | 2 digits |
| Error | 5 x 10-5 |
| Sweep range | 3 decades (log), 2 decades (lin) |
| Frequency output voltage | Approx. 0 V (start frequency) to + 5 V (stop frequency) |
| Pen lift output | TTL Pegel, 0 V (return) |
| Amplifier mode | |
| Amplifier TOE 7704, TOE 7706 |
Approx. 17 dB, DC up to ≤ 12 MHz |
| TOE 7707, TOE 7711 | Approx. 14 dB, DC up to 12 MHz Distortion factor < 0,2 % up to 100 kHz, input via “EXT IN“ |
| Trigger and gate modes | TOE 7706, TOE 7711 |
| Trigger | Manual, externally via “EXT IN“, or internally with the integrated sweep oscillator. Max. signal frequency approx. 12 MHz (TOE 7706), approx. 20 MHz (TOE 7711) |
| Gate enable | Manual, internally with the integrated sweep oscillator, or externally via “EXT IN“. Duty cycle 50 %. Max. signal frequency approx. 12 MHz (TOE 7706) approx. 20 MHz (TOE 7711) |
| Tripping voltage | TTL level |
| Start phase | - 90 ° to + 90 °, continuously adjustable |
| External AM | |
| Frequency range | 1 mHz to 22 MHz carrier frequency, all functions except pulse, TTL, ECL |
| Modulation frequency | DC up to 500 kHz |
| Modulation factor | 0 % to 200 % |
| Modulation voltage | 2.5 Vpp for 50 % AM |
Synthesizer mode (PLL)
(only TOE 7711).
In PLL mode, the output frequency is controlled with crystal accuracy. Short-term and long-term errors are negligibly small compared to the display resolution.
| Frequency range | 10 Hz to 44 MHz |
| Resolution | 4½ digits, autoranging |
| Frequency error | < 2 ppm |
| Drift | 5 x 10-8/K |
| Aging | ≤ 2 ppm/year |
Frequency counter mode
| Frequency range | 10 Hz to 50 MHz, reciprocal counting method |
| Resolution | 4½ digits, autoranging |
| Input voltage | TTL level |
| Gate time | 0.5 s |
| Time base error | < 10-5 |
| Aging | < 5 ppm/year |
| Input Impedance | 10 kohms |
| Input protection | Up to 15 Vrms |
Trigger and gate modes
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Manual, externally via “EXT IN“ or internally with aid of integral sweep oscillator. Duty cycle of 50 % required for gate mode. Max. signal frequency approx. 12 MHz (TOE 7706) approx. 20 MHz (TOE 7711). |
| Output signals in trigger and gate modes |
Amplitude modulation
| Amplitude modulation | |
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External AM 1 mHz to 22 MHz carrier frequency (TOE 7711), all functions except pulse, TTL, ECL Modulation frequency:: DC up to 500 kHz Modulation factor: 0 bis 200 % Modulation voltage: 2,5 Vpp for 50 % AM |
| Amplitude modulation with surpressed carrier |
Sweep modes
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| Continuous sweep with reset after start impulse |
Triggered sweep with hold and triggered reset |
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| Continuous sweep with reverse after start impulse |
Triggered sweep with hold and triggered reverse |
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| Triggered sweep with reset | Triggered sweep with triggered hold and triggered reset |
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| Triggered sweep with reverse | Triggered sweep with triggered hold and triggered reverse |
| Line voltage | 115 V / 230 V ± 10 %, 47 Hz to 63 Hz |
| Power consumption | 40 VA |
| Operating temperature | 0 °C to 50 °C |
| Reference temperature | 23 °C ± 1 °C |
| Storage temperature | - 20 °C to + 70 °C |
| Dimensions (W x H x D) | 265 x 147 x 330 mm |
| Weight | 5 kg |
| Housing | Aluminium |
Order information
| Function generator | TOE 7704 |
| Function generator | TOE 7706 |
| Function generator | TOE 7707 |
| Function generator | TOE 7711 |
Options
| TOE 7700/101 | Feedback voltage protection |
| TOE 9008 | Carrying handle |
| TOE 9501 | 19" adapter, 3 HU |
| TOE 9503 | 19" rack module, 4 HU |