Datasheet

Features in detail
Gated
In Gated mode the waveform runs only when the gate signal is true. The
start point of the waveform is settable from -360.0 to +360.0 degrees
and a the last cycle is completed after the gate signal goes false.
All of the options available for triggering are available for gating. The
trigger-in socket can be set as high or low for true.
Noise Generation
Both models can generate gaussian white noise to
a -3dB bandwidth of 20MHz. The noise generation
algorithm achieves a high crest factor (peak to rms
ratio) of 5.27.
Adding Noise to a waveform
Noise can be added to any waveform except pulse. The amount of noise
added can be specified as 0% to 50% of the amplitude of the carrier
waveform.
Modulating with Noise
Noise can be used as the modulating waveform for AM, FM, PM or
PWM modulations using any of the carrier waveforms allowable for that
modulation type.
Locking to Other Sources
Both the models include external reference and phase
locking as standard, unlike some competitor products
for which they are an expensive option.
External Frequency Reference
The generators use a high quality TCXO crystal as the internal frequency
reference providing 1ppm accuracy and stability.
If a higher accuracy or stability is required, an external 10MHz reference
signal (from an off-air standard for example) can be applied to the Ref.
Clock input.
Phase Locking Two Generators (or more)
Two generators can be synchronised to provide outputs at the same
frequency (or at harmonics) and with a phase difference.
The amplitude and phase of these outputs can also be modulated
providing the capability to perform QAM and QPSK respectively.
Any waveform other than pulse can be used, and the phase difference
is adjustable between -360.0 and +360.0 to a resolution of 0.1 degrees.
Skew is better than 5ns.
It is also possible to synchronise more than two generators but the
resulting precision is not specified.
N.B. In the case of two channel generators, when phase synchronising
is performed the two channels of each generator are also synchronised
providing four synchronous waveforms.
Two Channel Operation
(TG2512A & TG5012A only)
The generators are available in one channel or two
channel versions, the latter incorporating two outputs
with identical capabilities.
two channel generators, both channels provide the full performance and
specification, along with entirely independent operation when required.
The two channel models represent excellent value for money when
compared to purchasing two generators.
Individual or Combined Display
The graphic LCD can be switched to show either output individually, or
can be set to show the parameters or waveforms for both channels
simultaneously.
In the latter mode the currently selected channel is shown in reverse
video.
Independent Channel Operation
The two channels can be operated completely independently as if they
were two separate generators.
Coupled Operation
The frequencies of the two channels can be coupled such that if frequency
of one channel is changed the frequency of the other channel also
changes either by a fixed ratio or fixed offset.
Frequency coupling can be performed if the carrier waveforms on both
channels are either Sine, Square, Ramp, Pulse or Arbitrary.
Amplitudes (and DC offsets) of the two channels can be coupled such that
changing the amplitude and offset on one channel changes the amplitude
and offset of both channels.
Outputs of the two channels can be coupled such that switching the
output on/off on one channel switches the output on/off of both channels.
Tracking Operation
When in tracking mode both channels behave as one channel. If inverse
tracking is selected, both channel still behave as one channel except that
the output of channel 2 is inverted.
Relative Phase
The relative phase can be set from -360 degrees to +360 degrees with 0.1
degree resolution. Pressing the ‘align’ key phase synchronises the two
channels with the specified phase offset.
Cross Channel Trigger
Either channel can be triggered by the other channel to set up a complex
and versatile inter channel trigger scheme.
Each channel can have its trigger output waveform set up independently.
Trigger Out may be selected to be carrier waveform referenced,
modulation waveform referenced, sweep referenced, burst referenced or
currently selected trigger of the channel.
Noise, Phase Locking, Two Channel Operation