TTi Signal and Waveform Generator Products

  TG1010A - Description and Specifications

TG1010A - 10MHz DDS Function Generator

  10MHz D.D.S. function with arbitrary
  0.1mHz to 10MHz range, 7 digit resolution.
  Direct Digital Synthesis: high stability & resolution
  Eight standard waveforms, plus "complex" waveforms,
    true arbitrary waveforms and noise.
  Powerful modulation modes including Sweep, AM, Gating,
    Trigger/Burst, FSK and Hop.
  Variable symmetry, variable start/stop phase.
  Programmable via RS-232 or optional GPIB interfaces.

 

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A DDS generator at a non-DDS price
 The TG1010 breaks new ground by offering a DDS function generator at a similar price to that of a conventional generator of comparable functionality. It can generate a wide variety of waveforms between 0.1mHz and 10MHz with a resolution of 7 digits and an accuracy better than 10ppm.
Direct digital synthesis for accuracy & stability
Direct digital synthesis (DDS) is a technique for generating waveforms digitally using a phase accumulator, a look-up table and a DAC. The accuracy and stability of the resulting waveforms is related to that of the crystal master clock.
The DDS generator offers not only exceptional accuracy and stability but also high spectral purity, low phase noise and excellent frequency agility.
A wide range of waveforms
The TG1010 generates high quality sine, square and pulse waveforms over the full frequency range of 0.1mHz to 10MHz. Triangle waveforms, ramp waveforms and multi-level squarewaves can also be generated subject to some limitations in the maximum useable frequencies. Variable symmetry/duty-cycle is available for all waveforms.
Arbitrary waveform capability
 Arbitrary waveforms can be loaded via the digital interfaces and then used in a similar way to the standard waveforms.
Up to five arbitrary waveforms of 1024 10-bit words can be stored in non-volatile memory. The waveform clock is 27.48MHz maximum.
This facility considerably expands the versatility of the TG1010 making it suitable for the generation of highly complex waveform patterns.
In addition, the TG1010 offers numerous “complex” waveforms pre-defined in ROM. These include commonly used waveshapes such as sine x/x, decaying sinewave, exponential rise and fall etc.
Locked generators
 The signals from the Clock In/Out socket and the Sync Out socket can be used to phase lock two or more generators.
This can be used to generate multi-phase waveforms or locked waveforms of different frequencies.

Fully programmable
 Addressable RS-232 standard, GPIB optional
The TG1010 has an RS-232 interface as standard which can be used for remote control of all of the instrument functions or for the down-loading of arbitrary waveforms.
As well as operating as a conventional RS-232 interface, it can also be used in addressable mode whereby up to 32 instruments can be linked to one PC serial port as part of a TTi “ARC” system.
Alternatively, a GPIB interface conforming to IEEE-488.2 is available as an option.
 Powerful modulation modes:
Sweep
 All waveforms can be swept over their full frequency range at a rate variable between 10 milliseconds and 15 minutes. The sweep is fully phase continuous. Sweep can be linear or logarithmic, single or continuous. Single sweeps can be triggered from the front panel, the trigger input, or the digital interfaces.
Two sweep markers are provided which are adjustable whilst sweep is running. The markers can provide a visual indication of frequency points on a ‘scope or chart recorder.
AM
 Amplitude Modulation is available for all waveforms and is variable in 1% steps up to 100%. An internal AM source is incorporated. Alternatively modulation can be controlled from an external generator.
FSK
 Frequency Shift Keying provides phase coherent switching between two selected frequencies at a rate defined by the switching signal source. The rate can be set from dc to 50kHz internally, or dc to 1MHz externally.
Trigger/Burst
 All waveforms are available as a triggered burst whereby each positive edge of the Trigger signal will produce one burst of the carrier, starting and stopping at the phase angle specified by the start-stop phase setting. The number of cycles in the burst can be set between 0.5 and 1023.
Gated
 The Gated mode turns the output signal On when the gating signal is high and Off when it is low. Both Triggered and Gated modes can be operated from the internal Trigger Generator (0.005Hz to 50kHz) or from an external source (dc to 1MHz).
Waveform hop
 The generator can be set up to ‘hop’ between a number of different waveform set-ups either at a pre-determined rate or in response to a manual or bus trigger. Up to 16 different hop waveforms can be defined in terms of frequency, amplitude, function, offset and duration, which is variable in 1ms steps up to 60 seconds.
Noise generation
 The TG1010 can be set to simulate wide band random noise with adjustable amplitude and offset.
Easy and convenient to use
 The TG1010 is particularly easy to use. All of the main information is clearly displayed on a backlit LCD with 4 rows of 20 characters. Sub menus are used for the modulation modes and other complex functions.
All parameters can be entered directly from the numeric keypad. Alternatively most parameters can be incremented or decremented using the rotary encoder.
This system combines quick and easy numeric data entry with quasi-analogue adjustment when required.

SPECIFICATIONS

FREQUENCY

All waveforms are available up to 10MHz. However, the purity of triangle, ramp, and multi-level squarewave waveforms is not specified above the frequencies indicated in the following section.

Range

0.1mHz to 10MHz

Resolution

7 digits or 0.1mHZ

Accuracy

Typically <±10ppm for 1 year, 18oC to 28oC

Tempco.

Typically <1ppm/oC

WAVEFORMS

Sinewave

Distortion

<0.3% to 500kHz, -60dBc to 20kHz, <-50dBc to 1MHz, <-35dBc to 10MHz (typically -40dBc)

Spurii

Non harmonically related spurii typically <-65dBc to 1MHz, <-65dBc +6dB/Octave above 1MHz

Squarewave

Rise & Fall Times

<22ns

Triangle

Linearity error

<0.5% to 30kHz

Positive and Negative Ramp

Linearity error

<0.5% to 30kHz

Positive and Negative Pulse

Rise & Fall Times

<22ns

Multi-Level Squarewave

Up to 16 steps available per cycle, each step selectable for amplitude (10 bit resolution) and duration (1 to 1024 samples). Above 27kHz a 36ns edge uncertainty is introduced.

Rise & Fall Times

<22ns

Arbitrary (and Complex)

A number of “complex” waveforms are pre-programmed in ROM . A further 5, user defined, waveforms may be loaded via the digital interfaces and stored in non-volatile RAM.

Frequency range:

All waveform points can be continuously output up to 27kHz, beyond which they are sampled

No. of Samples

1024 10 bit samples

Noise

Wideband noise with variable amplitude and offset.

SYMMETRY

Range

Sine,Triangle, Ramp - 1% to 99% at all frequencies; Other waveforms - 1% to 99% to 30kHz, 20% to 80% to 10MHz

Resolution

0.1%

MAIN OUTPUT

Output Impedance

50Ohm or 600Ohm switchable

Amplitude

5mV to 20V pk-pk open circuit (2.5mV to 10V into 50W/600W).

Output can be specified as EMF (open circuit value) or PD (potential difference) in pk-pk, RMS or dBm. Note that in positive or negative Pulse modes the amplitude range is 2.5mV to 10V pk-pk O/C.

Accuracy

Typically ±3% ±1mV at 1kHz into 50W/600W

Flatness

±0.2dB to 200kHz; ±1dB to 5MHz; ±2.5dB to 10MHz

Pulse Aberrations

<5% + 2mV

DC Offset

±10V from 50W/600W. DC offset plus signal peak limited to ±10V from 50W/600W

Resolution

3 digits or 1mV for both amplitude and offset

MODULATION MODES

Trigger/Burst

Phase coherent signal keying - each positive edge of the Trigger signal will produce one burst of the carrier, starting and stopping at the phase angle specified by the Start/Stop phase setting.

Carrier frequency

0.1mHz to 10MHz

Carrier waveforms

All

Number of cycles

1 to 1023 (resolution 1 cycle) or 0.5 to 511.5 (resolution ˝ cycle)

Trigger rep. rate

dc to 50kHz internal,dc to 1MHz external

Source

Internal from keyboard or trigger generator. External from EXT TRIG input or remote interface

Gated

Non phase-coherent signal keying - output is On while Gate signal is high and Off while low.

Carrier frequency

From 0.1mHz to 10MHz

Carrier waveforms

All

Trigger rep. rate

dc to 50kHz internal, dc to 1MHz external

Gate source

Internal from keyboard or trigger generator. External from EXT TRIG input or remote interface

Sweep

Carrier waveforms

All

Sweep Mode

Linear or logarithmic, single or continuous

Sweep Width

0.1mHz to 10MHz. Phase continuous. Independent setting of the start and stop frequency.

Sweep Time

10ms to 999s (3 digit resolution)

Markers

Two markers variable during sweep. Available at the TRIG/SWEEP OUT socket

Sweep Trigger Source

The sweep may be free run or triggered from keyboard, EXT TRIG input, remote interface

Amplitude Modulation

Carrier frequency

0.1mHz to 10MHz

Carrier waveforms

All

Depth

0 to 100%, resolution 1%.

Internal source

1kHz fixed sinewave or 0.005Hz to 50kHz square wave

External

See “VCA In” section

Frequency Shift Keying (FSK)

Phase coherent switching between two frequencies at a rate defined by the switching signal source.

Carrier frequency

0.1mHz to 10MHz

Carrier waveforms

All

Switch repetition rate

dc to 50kHz internal, dc to 1MHz external

Switching signal source

Internal from keyboard or trigger generator. External from EXT TRIG input or remote interface

Hop

Up to 16 different “hop” waveforms can be defined in terms of function, frequency, amplitude, offset and duration. Duration settable per step 1ms to 60s.

START/STOP PHASE

Carrier frequency

0.1mHz to 10MHz

Carrier waveforms

All

Range

-360 to +360 degrees

Resolution

1 degree

Accuracy

Typically 1 degree to 20kHz

TRIGGER GENERATOR

Internal source 0.005Hz to 50kHz squarewave adjustable in 20us steps. 3 digit resolution. Available for external use from TRIG/SWEEP OUT socket

AUXILLIARY OUTPUTS

Aux Out

CMOS/TTL levels with symmetry and frequency of main output and phase of Start-Stop phase setting.

Trig/Sweep Out

Multi-function output depending upon mode. Except in Sweep mode, the output is that of the Trigger Generator at CMOS/TTL levels from 1kOhm.

In Sweep mode the output is a 3-level waveform, changing from high (+4V) to low (0V) at the start of sweep, with narrow 1V pulses at each marker point.

IINPUTS

Ext Trig

Frequency Range

DC to 1MHz

Signal Range

TTL (1.5V) threshold; maximum input ±10V

Min. Pulse Width

50ns

VCA In

Frequency Range

DC - 100kHz

Signal Range

2.5V for 100% level change at maximum output

Input Impedance

Typically 6kW

PHASE LOCKING

Clock In/Out

TTL/CMOS threshold levels; output impedance typically 50Ws as an output

Sync Out

TTL/CMOS logic levels from typically 50W

The signals from these sockets are used to phase lock two or more generators.

INTERFACES

Full remote control facilities are available through the RS232 (standard) or optional GPIB interfaces.

RS232

Variable Baud rate, 9600 Baud maximum. 9-pin D-connector. Fully compatible with Thurlby-Thandar ARC (Addressable RS232 Chain) system

IEEE-488

Conforming with IEEE488.1 and IEEE488.2

GENERAL

Display

20 character x 4 row alphanumeric LCD

Data Entry

Keyboard selection of mode, waveform etc.; value entry direct by numeric keys or by rotary control.

Stored Settings

Up to 9 complete instrument set-ups may be stored and recalled from battery-backed memory.

Size

3U (130mm) height; half-rack (212mm) width, 330mm long

Weight

4.1kg (9lb)

Power

230V ±14% 50/60Hz AC or 115V ±14% 50/60Hz AC by internal adjustment; 40VA max.

Operating Range

+5oC to 40oC, 20-80% RH

Storage Range

-20oC to +50oC

Safety and EMC

Complies with EN6010-1 and EN61326

Options

IEEE-488 interface; 19 inch rack mounting kit

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
Tel: 01480 412451  Fax: 01480 450409  Web: www.tti.co.uk  Email: sales@tti.co.uk