THURLBY THANDAR INSTRUMENTS TG550 Advanced 5MHz Function Generator with Sweep OPERATING MODES CAL TG550 FUNCTION GENERATOR FREQUENCY RANGE SYMMETRY ON (f/10) 5Hz FUNCTION ATTENUATOR 50Hz 500Hz 5kHz 50kHz 500kHz 5MHz -40dB -20dB OFFSET CLIP DC PK-PK /RMS m V p-p m V rm s GATE TIME IN T-A M -EX T M Hz PRECISION COUNTER / CRYSTAL FREQUENCY LOCK 1.5 FREQUENCY (START) 2.0 2.5 3.0 3.5 LOCKED 4.0 1.0 4.5 0.5 0.05 0.005 5.0 SWEEP (ext counter) SET START INT ON EXT OFF EXT COUNTER (5Hz -20MHz) LIN READY COUNT LOCK FINE RATE STOP SWEEP IN/OUT 0.005Hz to 5MHz frequency range Simultaneous display of frequency & level Frequency locking for increased stability Precision internal linear or logarithmic sweep External counter with 7 digit resolution Very high waveform quality throughout range 20V pk-pk from 50/600 , plus TTL/CMOS 1000:1 frequency change by vernier or sweep lnternal or external amplitude modulation The TG550 represents the state-of-the-art in 5MHz analogue function generators. It provides very high waveform quality at all frequencies and levels. The large LCD display provides a digital readout of both frequency and level (peak-to-peak amplitude, rms amplitude or dc offset). Advanced measurement techniques are used to provide high accuracy with fast update even at low frequencies. The TG550 includes a digital frequency locking system that gives it a level of frequency stability that cannot be matched by conventional analogue function generators. Once the frequency has been set, pressing the Lock key engages a measure-and-correct circuit which compensates for the small thermal and mechanical drifts that inevitably occur in an analogue generator. The frequency is compared to a crystal controlled reference and is maintained to within 0.01% of the set frequency. An external counter mode is available which utilises the full width of the display to provide up to seven digits of resolution. A reciprocal counting measurement system is used which ensures high resolution regardless of input frequency. Thus, for example, mains frequency can be measured to a resolution of better than 1mHz. FREQUENCY Frequency Range: 0.005Hz to 5MHz in 7 overlapping decade ranges with fine adjustment by verniers. Vernier Range: 1000:1 on each range. o AM EXT LOG SET STOP DC OFFSET AM / EXT COUNTER INT EXT AM EXT IN LEVEL AMPLITUDE max max AUX OUT MAIN OUT MAIN OUT TTL/CMOS 600 W 50 W METER FUNCTIONS (generator mode) Frequency: Auto-ranging reciprocal measurement giving 4 digit resolution for frequencies down to 1Hz; maximum resolution is 0.001Hz. Accuracy 1 digit 0.2Hz to 5MHz; accuracy 1% of range below 0.2Hz Amplitude: Display shows peak-to-peak amplitude or rms value. Display corrected for attenuator setting. 3-digit resolution, accuracy typically 5% of range DC Offset: 3-digit resolution; accuracy typically 2% of setting 1 digit. Display corrected for attenuator setting OUTPUTS MAIN - 50 Ohm Amplitide 2mV to 20V peak-peak open circuit (1mV to 10V peak-peak into 50) in four switch-selectable ranges with 20dB vernier control within each range Attenuator Ranges: 0dB, -20dB, -40dB, -60dB DC Offset Range: 10V from 50. DC offset plus signal peak limited to 10V (5V into 50). DC offset plus waveform attenuated proportionally by the attenuator. MAIN - 600 Ohm Alternative output socket offering the same facilities as the 50 socket. AUX OUT 0 to 5V TTL/CMOS logic levels capable of driving 2 standard TTL loads. Frequency, symmetry and phase as main outputs SWEEP OUT 3V ramp from 600 EXTERNAL COUNTER Frequency Range: 5Hz to 20MHz, fully autoranging Input Sensitivity: 50mV rms (sinewave) Measurement Time: Selectable 0.5s or 5s Resolution: 6 digits in 0.5s; 7 digits in 5s Accuracy: 1 digit timebase accuracy Timebase Accuracy: 10ppm initial error; 5ppm/year ageing rate; o typically less then 0.5ppm/ C. Adjustment point for closed-case recalibration Specifications apply for the top decade of each frequency range and maximum output into 50 termination. SINE Distortion: <0.5% on 500, 5k and 50k ranges; <1% on 5, 50 and 500k ranges; all harmonics >25dB below fundamental on 5M range. Amplitude Flatness: 0.2dB to 200kHz; 2dB to 5MHz. TRIANGLE Linearity: Better than 99% to 200kHz SQUARE WAVE Rise and Fall Times: <45ns Mark - Space Ratio: 1:1 1% to 100kHz DC Range: 10V unterminated SYMMETRY Symmetry Range: Variable typically 1:9 to 9:1 (on top decade of each range), frequency divided by 10. SWEEP MODES INTERNAL Sweep Range: >1000:1 within each range. Sweep Rate: Adjustable, typically 20ms to 20 secs. Sweep Mode: Linear or logarithmic. Sweep start and stop frequencies displayed by button press. EXTERNAL Input Impedance: 10k Input Sensitivity: 0 to 3V for 1000:1 sweep Max. Input Voltage: 10V Sweep Linearity: Better than 1% Max. Voltage Rate: 0.1V/us AMPLITUDE MODULATION Depth: Variable 0 to 100% Frequency: 400Hz (internal). DC to 100kHz (external). External Sensitivity: Approx. 2V peak-to-peak for 50% modulation. GENERAL POWER REQUIREMENTS Input Voltage: 230V or 115V nominal 50/60Hz, by internal adjustment; operating range 14% of nominal. Installation Category II. Consumption: 25VA max. ENVIRONMENTAL & MECHANICAL o o Operating Range: +5 C to +40 C, 20% to 80% RH. Storage Range: -10oC to +65oC Environmental: Indoor use at <2000m, Pollution degree I Safety: Complies with EN601010-1 EMC: Complies with EN50081-1 & EN50082-1 Size: 260(W) x 88(H) x 235(D)mm (10.2 x 3.4 x 9.2"), excluding handle and feet. Weight: 1.9kg (4.2lb) approx. Thurlby Thandar Instruments Ltd. operates a policy of continuous development and reserves the right to alter specifications without prior notice. FREQUENCY LOCKING Operating Range: Locking Accuracy: 0.5Hz to 5MHz with vernier setting within 10% to 100% of range maximum. Better than 0.01% of displayed value. Designed and built in the EEC by: DISPLAY LCD, 8 digits (11mm high) plus 14 annunciators Note: This is a faxable data sheet, a colour brochure is also available. Thurlby Thandar Instruments Ltd. Glebe Road, Huntingdon. Cambs. PE18 7DX England Tel: +44 (0)1480 412451 Fax: +44 (0)1480 450409 e-mail: sales@ttinst.co.uk Web: http://www.ttinst.co.uk