The revised TG300 series from TTi (Thurlby Thandar Instruments) is a range of three function generators with a maximum frequency of 3MHz and which provide simultaneous digital display of frequency and level. The new models are housed in the company’s latest 2U high bench instrument case.

The top two models of the series (TG320 and TG330) also have an external frequency counter mode which utilizes the full width of the display to provide up to seven and a half digits of resolution. The frequency range is from 5Hz up to 120MHz and the input sensitivity is better than 50mV rms. Accuracy is typically better than 10ppm and an external adjustment point allows re-calibration when high accuracy is essential. A measurement period of 0.5 or 5 seconds can be selected. Reciprocal counting ensures high resolution regardless of input frequency. Thus, for example, mains frequency can be measured to a resolution of 0.001Hz

The TG300 series can generate sine, square, triangle, pulse and ramp waveforms from 0.03Hz up to 3MHz. Variable bi-directional symmetry with constant frequency is provided over a ten to one range. An external sweep input allows the frequency on each range to be varied by at least 1000:1.

Auto-ranging reciprocal frequency measurement gives 4-digit resolution with rapid update right down to 2Hz. Accuracy is within ±1 digit (±0.03% at full scale). To maintain a fast update below 2Hz, the measurement mode is changed resulting in 3-digit resolution. When compared to the normal fixed gate-time meters used in other products the TG300 series provides both higher accuracy and faster display update across the whole frequency range.

The output level display can be selected to show any of three values: peak to peak amplitude, rms amplitude or DC offset. The decimal point and units are changed automatically resulting in a display of the true amplitude regardless of the attenuator setting.

Each generator provides a main output with a maximum emf of 20V pk-pk from a 50 Ohms or 600 Ohms source. An amplitude vernier with a range of 20dB is combined with two switched attenuators of -20dB and -40dB to provide levels down to 2mV pk-pk unterminated.
Variable DC offset of ±10V is available via a centre detent control. An auxiliary output provides a fixed 0V to +5V level suitable for driving both TTL and CMOS loads

The top model in the series, the TG330, has a built-in sweep generator providing linear or logarithmic sweeps with periods ranging from 20ms to 20 seconds. AM capability is also incorporated with a choice of internal or external modulation from 0 to 100%.


Arnold Memelink

Arnold Memelink


"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."

University of Luxembourg

Sasan Rafii-Tabrizi

University of Luxembourg

“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”


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