Signal and Waveform Generator Products from TTi - Thurlby Thandar Instruments

  TG550 - Description and Specifications

TG550 - 5MHz Advanced Function Generator

  0.005Hz to 5MHz frequency range
  Built-in 7 digit frequency counter
  Digital frequency lock for exceptional stability
  Simultaneous display of frequency and voltage
     amplitude or offset
  Internal/external AM up to 100%
  Precision internal lin/log sweep

 

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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.

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. 		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.

FREQUENCY 

Frequency Range:

0.005Hz to 5MHz in 7 overlapping decade ranges with fine adjustment by verniers.

Vernier Range:

1000:1 on each range.

FREQUENCY LOCKING  

Operating Range:

0.5Hz to 5MHz with vernier setting within 10% to 100% of range maximum.

Locking Accuracy:

Better than 0.01% of displayed value.

 DISPLAY 

LCD, 8 digits (11mm high) plus 14 annunciators

 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 50Ohms) in four switch-selectable ranges with 20dB vernier control within each range 

Attenuator Ranges:

0dB, -20dB, -40dB, -60dB

DC Offset Range:

±10V from 50W. DC offset plus signal peak limited to ±10V (±5V into 50W). DC offset plus waveform attenuated proportionally by the attenuator.

 MAIN - 600 Ohm 

Alternative output socket offering the same facilities as the 50W 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 600W

 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; typically less then 0.5ppm/oC. Adjustment point for closed-case recalibration

 OPERATING MODES  

Specifications apply for the top decade of each frequency range and maximum output into 50W 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:

10kW

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

Operating Range:

+5oC to +40oC, 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.

Thurlby Thandar Instruments Limited
Glebe Road, Huntingdon, Cambridgeshire PE29 7DR United Kingdom
Tel: +44 1480 412451  Fax: +44 1480 450409  Web: www.tti-test.com  Email: sales@tti-test.com