Technical Specifications FREQUENCY OPERATING MODES Frequency Range: 0.005Hz to 5MHz in 7 overlapping decade Specifications apply for the top decade of each frequency range and maximum ranges with fine adjustment by verniers. output into 50 termination. Vernier Range: 1000:1 on each range. SINE Distortion: <0.5% on 500, 5k and 50k ranges <1% on FREQUENCY LOCKING 5, 50 and 500k ranges all harmonics >25dB Operating Range: 0.5Hz to 5MHz with vernier setting within below fundamental on 5M range. 10% to 100% of range maximum. Amplitude Flatness: 0.2dB to 200kHz 2dB to 5MHz. AIM & THURLBY THANDAR INSTRUMENTS Locking Accuracy: Better than 0.01% of displayed value. TRIANGLE Linearity: Better than 99% to 200kHz DISPLAY TG550 SQUARE WAVE LCD, 8 digits (11mm high) plus 14 annunciators Rise/Fall Times: <45ns Mark - Space Ratio: 1:1 1% to 100kHz METER FUNCTIONS (generator mode) DC Frequency: Auto-ranging reciprocal measurement giving Range: 10V unterminated 4 digit resolution for frequencies down to SYMMETRY 1Hz maximum resolution is 0.001Hz. Symmetry Range: Variable typically 1:9 to 9:1 (on top decade of Accuracy 1 digit 0.2Hz to 5MHz accuracy each range), frequency divided by 10. 1% of range full scale below 0.2Hz Amplitude: Display shows peak-to-peak amplitude or rms SWEEP MODES value. Display corrected for attenuator setting. 3-digit resolution, accuracy typically INTERNAL 5% of range Sweep Range: >1000:1 within each range. DC Offset: 3-digit resolution accuracy typically 2% of Sweep Rate: Adjustable, typically 20ms to 20 secs. setting 1 digit. Display corrected for Sweep Mode: Linear or logarithmic. Sweep start and stop attenuator setting frequencies displayed by button press. OUTPUTS EXTERNAL Input Impedance: 10k MAIN - 50 Ohm Input Sensitivity: 0 to 3V for 1000:1 sweep Amplitide 2mV to 20V peak-peak open circuit (1mV to Max. Input Voltage: 10V 10V peak-peak into 50 ) in four Sweep Linearity: Better than 1% switch-selectable ranges with 20dB vernier Max. Voltage Rate: 0.1V/us control within each range AMPLITUDE MODULATION Attenuator Ranges: 0dB, -20dB, -40dB, -60dB DC Offset Range: 10V from 50 . DC offset plus signal peak Depth: Variable 0 to 100% limited to 10V (5V into 50 ). DC offset Frequency: 400Hz (internal). DC to 20kHz (external). plus waveform attenuated proportionally by External Sensitivity: Approx. 2V peak-to-peak for 50% modulation. the attenuator. GENERAL MAIN - 600 Ohm Alternative output socket offering the same facilities as the 50 socket. POWER REQUIREMENTS AUX OUT 0 to 5V TTL/CMOS logic levels capable of AC Input: 220 to 240 volts 10% or 110 to 120 volts driving 2 standard TTL loads. Frequency, 10% 50/60Hz, Installation Category II. symmetry and phase as main outputs Consumption: 25VA max. SWEEP OUT 3V ramp from 600 ENVIRONMENTAL & MECHANICAL o o EXTERNAL COUNTER Operating Range: +5 C to +40 C, 20% to 80% RH. o o Storage Range: -10 C to +65 C Frequency Range: 5Hz to 20MHz, fully autoranging Environmental: Indoor use at <2000m, Pollution degree 2 Input Sensitivity: 50mV rms (sinewave) Safety: Complies with EN601010-1 Input Impedance: 1M /25pF EMC: Complies with EN61326 Measurement Time: Selectable 0.5s or 5s Size: 260(W) x 88(H) x 235(D)mm , excluding han- Resolution: 6 digits in 0.5s 7 digits in 5s dle and feet. Accuracy: 1 digit timebase accuracy Weight: 1.9kg approx. Timebase Accuracy: 10ppm initial error 5ppm/year ageing rate 5MHz function generator with sweep o typically less then 0.5ppm/ C. Adjustment point for closed-case recalibration Thurlby Thandar Instruments Ltd. operates a policy of continuous development and simultaneous display of frequency & amplitude reserves the right to alter specifications without prior notice. crystal controlled digital frequency locking Designed and built in Europe by: seven digit external frequency counter Thurlby Thandar Instruments Ltd. Glebe Road, Huntingdon. Cambs. PE29 7DX United Kingdom (UK) Tel: +44 (0)1480 412451 Fax: +44 (0)1480 450409 Email: info aimtti.com Web: www.aimtti.com 82100-0077 Iss. 2Asimultaneous display of frequency and level TG550 5MHz function generator with sweep digital frequency locking for exceptional accuracy and stability external frequency counter with seven digit resolution A state-of-the-art Exceptional waveform quality Advanced internal sweep External counter with Wide range level control Dual digital displays for instrument The TG550 provides very high waveform The TG550 series provides a main output The TG550 incorporates a versatile inter- seven digit resolution precision & convenience The function generator is one of the most quality under all conditions. with a maximum emf of 20V pk-pk from a nal sweep generator capable of providing The TG550 has an external counter mode The TG550 incorporates a large dual versatile pieces of test & measurement in- 50 or 600 source. linear or logarithmic frequency sweeps. That means low sinewave distortion, low which utilises the full width of the display to section digital display. strumentation available. aberration triangle waves and fast-edged An amplitude vernier with a range of 20dB Start and stop frequencies can be set with provide up to seven digits of resolution. Unlike competitive products the display It can generate a variety of precision square waves with low overshoot. is combined with two switched attenua- precision using the digital display. Sweep The frequency range is from 5Hz up to provides a readout not just of frequency, waveshapes over a range of frequencies ranges of over 1000:1 are possible. Unlike many competitive products good tors of -20dB and -40dB to provide levels 20MHz and the input sensitivity is better but of amplitude or offset simultaneously. from mHz to MHz. It can provide a wide down to 2mV pk-pk unterminated. waveform quality is maintained through- The sweep rate is adjustable over a wide than 50mV rms. range of controlled amplitudes from a out the frequency range and at low output Variable DC offset of 10V is available via range with good setability between limits Fast and accurate frequency low-impedance source, and maintain con- levels. a center detent control. An auxiliary output of 20ms and 20s. stant amplitude as the frequency is varied. measurement provides a fixed 0V to +5V level suitable A sweep output socket is provided for use Variable symmetry for pulse Voltage control of frequency enables a for driving both TTL and CMOS loads. Auto-ranging reciprocal measurement with an oscilloscope or an X-Y recorder. Un- source of swept frequency to be gener- gives 4-digit resolution with rapid update and ramp waveforms like many other sweep generators, the ated for frequency response testing. AM Wide sweep range right down to Hz levels. Accuracy is within sweep ramp is triangular which gives a su- The TG550 series provides bi-directional and FM modulation can also be added. 1 digit (0.02% at full scale). Each range can be swept by at least perior display when using an oscilloscope to A measurement period of 0.5 or 5 seconds variable symmetry from 1:9 to 9:1. Unlike The TG550 represent the state-of-the-art To maintain a fast update at sub-Hz 1000:1 either manually, via the external in- display swept frequencies. can be selected. A reciprocal counting some products, frequency is independent in 5MHz analogue function generators. frequencies, the measurement mode is put, or using the built-in sweep generator. measurement system is used which en- of symmetry setting. changed resulting in 3-digit resolution and sures high resolution regardless of input reduced accuracy. frequency. However, when compared to the normal Thus, for example, mains frequency can fixed gate-time meters used in other prod- be measured to a resolution of better than ucts the TG550 provides both higher accu- 1mHz. racy and faster display update across the Accuracy is better than 10ppm (0.001%) whole frequency range. and an external adjustment point allows for closed case re-calibration. Part of an extensive range TTi offers a wide choice of function gener- The display of a filter response using an ators both analogue and digital, from a oscilloscope in XY mode and a TG550 in simple 2MHz model up to a highly sophis- RMS or peak to peak swept frequency mode. ticated 40MHz unit. amplitude display Contact TTi or visit the website for details The output level display can be selected to of the full range. Amplitude modulation for show any of three values: extra versatility 1. The peak to peak amplitude - The TG550 also incorporates comprehen 2. The RMS amplitude sive AM facilities. 3. The DC offset The modulation can be external or internal RMS values are calculated correctly for (via a 400Hz internal generator) with each waveform shape modulation levels fully variable between 0% and 100%. Frequency locking for 0.005Hz to 5MHz frequency range exceptional stability Simultaneous display of frequency & amplitude The TG550 includes a digital frequency locking system that gives it a level of Frequency locking for crystal controlled stability frequency stability that cannot be matched The decimal point and units are changed by conventional analogue function gen- Precision internal linear or logarithmic sweep automatically resulting in a display of the erators. true amplitude regardless of the attenua- External frequency counter with 7 digit resolution Once the frequency has been set, pressing tor setting. the Lock key engages a measure-and- An display indicator warns against illegal Very high waveform quality at all frequencies & levels correct circuit which compensates for the combinations of offset and amplitude small thermal and mechanical drifts that in- 20V pk-pk from 50 or 600 plus TTL/CMOS output setting that would create clipping in the evitably occur in an analogue generator. output stage. The frequency is compared to a crystal con- 1000:1 frequency change by vernier or sweep voltage trolled reference and is maintained to within lnternal or external amplitude modulation up to 100% 0.01% of the set frequency.