Technical Specifications Specifications apply at 18- 28C after 1 hour warm-up, at maximum output into 50 . Tone The tone is output while the trigger signal is high, and stopped when the trigger signal FREQUENCY is low. The next tone is output when the trigger signal goes high again. Carrier waveforms: All All waveforms are derived from a crystal clock using Direct Digital Synthesis. Frequency list: Up to 16 frequencies between 1Hz and 10MHz/20MHz Frequency Range: 1mHz to 10MHz (TG1000) or 20MHz (TG2000) Min. switching time: 1ms per tone Resolution: 6 digits or 1mHz o o Switching source: Front panel MAN TRIG key, Internal Trigger Generator, Accuracy: 10ppm for 1 year, 18 C to 28 C 1mHz below 0.2Hz o o o TRIG/GATE input, or Remote Interface Tempco.: Typically <1ppm/ C outside of 18 C to 28 C Internal Trigger/Gate Generator WAVEFORMS Period: 0.2ms to 999s (resolution 0.2 ms) Waveform: Square wave (1:1 duty cycle) AIM & THURLBY THANDAR INSTRUMENTS Sinewave Range: 1mHz to 10MHz/20MHz MAIN OUTPUT Resolution: 6 digits or 1mHz Output Impedance: Distortion: <0.3% THD to 20kHz (typically 0.1%), <-45dBc to 50 or 600 switchable TG1000 & TG2000 Amplitude: 300kHz, <-35dBc to 20MHz (typically <-40dBc) 5mV to 20V pk-pk open circuit (2.5mV to10V into 50/600 ) Spurii: Non harmonically related spurii <-55dBc to 1MHz, Output can be specified as V-HiZ (open circuit value) or V (potential difference) in <(-55dBc + 6dB/octave) 1MHz to 20MHz pk-pk, RMS or dBm. Note that in positive or negative Pulse modes the amplitude range Output Level: is 2.5mV to 10V pk-pk O/C. 5mV to 20V pk-pk from 50 or 600 Accuracy: 3% 1mV at 1kHz into 50 /600 Squarewave Flatness: 0.2dB to 500kHz 1dB to 10MHz 2dB to 20MHz Range: 1mHz to 10MHz/20MHz DC Offset: 10V from 50 /600 . DC offset plus signal peak limited to Resolution: 6 digits or 1mHz 10V. Accuracy 3% 10mV Symmetry: variable 20% to 80% in 1% steps Resolution: 3 digits for both amplitude and offset Aberrations: <5% + 2mV Rise & Fall Times: <22ns AUXILIARY OUTPUT Output Level: 5mV to 20V pk-pk from 50 or 600 Multi-function output user definable to be any of the following: Triangle Waveform Sync: Outputs a 50% duty cycle squarewave at the main wave- Range: 1mHz to 1MHz form frequency Resolution: 6 digits or 1mHz Trigger Out: Outputs a replica of the current trigger signal Linearity error: <0.5% to 100kHz Sweep Sync: Outputs a trigger signal at the start of sweep (for synchro- Output Level: 5mV to 20V pk-pk from 50 or 600 nising an oscilloscope or chart recorder). Can additionally Positive and Negative Pulse output a sweep marker. Signal Levels: Output Impedance 50 nominal. Logic levels of <0.8V and Range: 1mHz to 10MHz/20MHz >3V. Sweep Sync is a 3 level waveform, low at start of Resolution: 6 digits or 1mHz sweep, high at end of sweep, with a narrow 1V pulse at the Symmetry: variable 20% to 80% in 1% steps Aberrations: <5% + 2mV marker point Rise & Fall Times: <22ns Output Level: 2.5mV to 10V pk-pk from 50/600 positive or negative INPUTS only pulses with respect to the DC Offset baseline Ext Trig/Gate Frequency Range: DC to 1MHz for FSK DC to 100kHz for Gate DC to 2.5kHz MODULATION MODES for Tone and Sweep Continuous Signal Range: Nominal TTL level threshold maximum input10V Continuous cycles of the selected waveform are output at the selected frequency. Min. Pulse Width: 100ns for Gate/FSK 0.2ms for Sweep and Tone Input Impedance: Typically 10k Gated VCA In Non phase-coherent signal keying - output is On while Gate signal is high and Off while low. Frequency Range: DC - 100kHz Signal Range: 2.5V for 100% level change at maximum output Carrier frequency: From 0.1Hz to 10MHz/20MHz Input Impedance: Carrier waveforms: All Typically 6k Trigger rep. rate: dc to 100kHz external, dc to 5kHz internal Gate source: Front panel MAN TRIG key, Internal Gate Generator, INTERFACES (TG2000 only) TRIG/GATE input, or Remote Interface Full remote control facilities are available through the RS232 or USB interfaces. Sweep RS232: Variable Baud rate (19200 max), 9-pin D-connector. As Carrier waveforms: All well as operating in a conventional RS-232 mode the inter- Sweep Mode: Linear or logarithmic, single or continuous face can be operated in addressable mode whereby up to Sweep Width: 0.2Hz to 10MHz/20MHz in one range. Phase continuous. 32 instruments can be addressed from one RS-232 port Independent setting of the start and stop frequency USB: Standard USB hardware connection. Conforming USB 1.1 Sweep Time: 50ms to 999s (3 digit resolution) Markers: Available from AUX output. Variable during sweep GENERAL Sweep Trigger The sweep may be free run or triggered from: front panel source: MAN TRIG key, TRIG/GATE input, or Remote Interface Display: 20 character x 4 row alphanumeric LCD Data Entry: Keyboard selection of mode, waveform etc. value entry di- Amplitude Modulation rect by numeric keys or by rotary control. Carrier frequency: 1mHz to 10MHz/20MHz Stored Settings: Up to 9 complete instrument set-ups may be stored in Carrier waveforms: All battery-backed memory. Modulation source: VCA IN socket Size & Weight: 260(W) x 88(H) x 235(D) mm 2kg (4.5lb) Power: 100V, 110-120V or 220-240V 10% 50/60Hz, adjustable in- Frequency Shift Keying (FSK) ternally. 40VA max. Installation Category II. 10MHz & 20MHz DDS function generators Phase coherent switching between two selected frequencies at a rate defined by the o o Operating Range: +5 C to 40 C, 20-80% RH switching signal source. o o Storage Range: -20 C to +60 C Carrier frequency: 1Hz to 10MHz/20MHz Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2 Carrier waveforms: All Sweep, AM, FSK & Tone switching modes Safety & EMC: Complies with EN6010-1 and EN61326 Switch rate: dc to 5kHz (internal), dc to 1MHz (external) Switching signal Front panel MAN TRIG key, Internal Trigger Generator, Thurlby Thandar Instruments Ltd. operates a policy of continuous development and re- RS-232 and USB interfaces (TG2000 only) source: TRIG/GATE input, or Remote Interface serves the right to alter specifications without prior notice. Designed and built in Europe by: Direct Digital Synthesis Thurlby Thandar Instruments Ltd. Glebe Road, Huntingdon. Cambs. PE29 7DR United Kingdom (UK) Tel: +44 (0)1480 412451 Fax: +44 (0)1480 450409 Email: info aimtti.com Web: www.aimtti.com 82100-1240 Issue 2AA value-for-money 10MHz or 20MHz function generator with the precision of Direct Digital Synthesis and full digital control via RS-232 or USB (TG2000 only) A new price point Ease of use Wide frequency and amplitude range Modulation modes The TG1000 and TG2000 are particularly The TG1000/2000 breaks new ground by offering a high quality The TG2000 can generate waveforms between 0.001Hz and Sweep easy to use. All of the main information is DDS function generator at a significantly lower price. 20MHz with a resolution of six digits and a one year accuracy All waveforms can be swept over their full clearly displayed on a backlit LCD with 4 better than 10ppm. The TG1000 has a 10MHz limit. DDS (direct digital synthesis) is a technique for generating frequency range (0.2Hz minimum) at a rate rows of 20 characters. Sub menus are waveforms digitally using a phase accumulator, a look-up table Amplitude is variable between 5mV and 20V pk-pk from a source variable between 50 milliseconds and used for the modulation modes and other and a DAC. The accuracy and stability of the resulting wave- impedance of 50 or 600 . more than 15 minutes. The sweep is fully complex functions. forms is related to that of the crystal master clock. phase continuous. Unlike many generators, the waveform quality remains excellent All parameters can be entered directly from When correctly engineered, the DDS generator offers not only Sweep can be linear or logarithmic, single over the full amplitude range. the numeric keypad. Alternatively most pa- exceptional accuracy and stability but also high spectral purity, or continuous. Single sweeps can be trig- rameters can be incremented or decre- low phase noise and excellent frequency agility. gered from the front panel, the trigger input, mented using the rotary encoder for RS-232 and USB interfaces or the digital interfaces. quasi-analogue control. The TG2000 also includes both an RS-232 interface and USB Phase continuous frequency sweep. A sweep marker is provided that is adjust- Total digital control interface. Frequency or period entry able whilst sweep is running. The markers Unlike some other generators which only provide digital control These interfaces can be used for remote control of all of the in- The generator frequency can be set in can provide a visual indication of frequency of frequency, every function is digitally controlled enabling strument functions and for remotely storing instrument terms of either frequency or period. points on a scope or chart recorder. complete instrument set-ups to be stored, or full remote control set-ups. Numeric entry is floating point using what- Gated to be implemented (TG2000 only). ever units the operator prefers. The Gated mode sets the output signal on Flexible amplitude entry or off depending on the gating signal state. Amplitudes can be entered in terms of peak The gating source can be the front panel to peak voltage, RMS voltage or dBm. key, internal trigger generator, trigger input socket, or bus interface signal. The output impedance can be set to 50 or 600 , and the amplitude can be set in AM terms of either the voltage into the correct External Amplitude Modulation of up to termination, or the source EMF (for a high 100% is available for all waveforms via the impedance load). Amplitude modulation using an external sine VCA input. wave modulation source. FSK Quick recall of settings Frequency Shift Keying provides phase co- Both generators provide nine memories for herent switching between two selected fre- storing settings. quencies at a rate defined by the source. Because all parameters are controlled The switching source can be the front panel electronically, the memories store the full key, internal trigger generator, trigger input set-up of the instrument and automated socket, or bus interface signal. test sequences are easy to set up. In addition to the nine user memories, the Tone Switching current state of the instrument is saved at The generator can be set to switch be- switch off. The user can choose to have tween a number of different frequencies in this state restored at switch on, or choose a response to a trigger signal. pre-defined default set-up. Up to 16 frequencies can be defined. Frequency switching in FSK mode. Synchronisation 0.001Hz to 10MHz or 20MHz frequency range, 6 digits or 1mHz setting resolution. The auxiliary output socket can provide any See the difference one of three different Sync. signals. 1ppm stability and better than 10 ppm absolute accuracy for one year. Waveform Sync is a 50% duty cycle square Ultimately what matters in a function gener- Sine, square, triangle, positive pulse and negative pulse waveforms. wave at the frequency of the main output. ator is the quality of the output signal. Sweep Sync. outputs a pulse at the start of The TG1000/2000 maintains the TTi Low distortion, high spectral purity sine waves. reputation for high signal quality at all each sweep and can also output a pulse at a user defined marker frequency. frequencies and all levels. Internal sweep, linear or logarithmic, full range phase continuous, adjustable marker. Trigger Out provides a replica of the trigger The waveform capture opposite shows just signal which can be from the trigger input how much difference that can make Modulations modes of gated, AM, FSK and tone switching built-in trigger generator. socket, the internal trigger/gate generator, The scope display opposite was captured the manual trigger key, or the bus interface. 5mV to 20V pk-pk output from 50 or 600 plus multi function auxiliary output. from two 5MHz square wave signals each at 60mV pk-pk level into 50 . Storage for up to nine complete instrument set-ups in non-volatile memory. The upper waveform is from a widely avail- able competitive DDS generator. Fully programmable via RS-232 or USB interfaces (TG2000 only). The lower waveform is from a TG2000.