Research and Clinical Instruments Manufacturer & Supplier
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MEA SystemsMED64 – BasicMED64 – Quad IIMED64 – AllegroMED64 – Plex 4/8MED64 – PrestoMED64 – Mobius SoftwareMED64 ProbesPerfusion EquipmentPerfusion SystemsPerfusion AccessoriesPipette FabricationMicropipette PullersMicroforges & MicrogrindersReplacement PartsCapillary GlassProgrammers & TimersDG2A Train Delay GeneratorNeuroLog System
Signal GeneratorsTG315 Function GeneratorSoftwareQtracW Threshold TrackingAutoMate EasycodeHEKA Chartmaster SoftwareHEKA Patchmaster SoftwareHEKA Fitmaster SoftwareStimulatorsDS2A Constant VoltageDS3 Constant CurrentDS4 Biphasic Constant CurrentDS5 Bipolar Constant CurrentDS7A/DS7AH Constant CurrentDS7R Constant Current ResearchDS8R Biphasic ResearchD121-11 Mounting FrameD185 Transcranial MultiPulseD330 MultiStim SystemNL800A Current Stimulus Isolator
A/D Interface ModulesNL201 – Spike TriggerNL601 – Pulse IntegratorAmplifier ModulesNL100AK – HeadstageNL100RK (NL100AKS & NL100C)NL102G – DC PreamplifierNL104A – AC PreamplifierNL106 – AC/DC AmplifierNL108A – Pressure AmplifierNL109 – Bridge AmplifierNL120S – Audio AmplifierNL820A – 4-Ch. IsolatorNL844 – 4-Ch. AC PreamplifierAnalogue ModulesNL254 – RatemeterNL506 – Analogue SwitchNL703 – EMG Integrator
Digital ModulesNL405 – Width/DelayNL501 – Logic GateNL505 – Flip FlopNL603 – CounterNL730 – Pulse ShiftFilter & Conditioner ModulesNL125/6 – Band-Pass FilterNL134/5/6 – 4-Ch. Low Pass FiltersNL143 – 3-Ch. Difference AmplifierNL144 – 4-Ch. High Pass FilterNL530 – Signal ConditionerNL540 – Inverting Attenuator (Alt. Gain)Generator ModulesNL301 – Pulse GeneratorNL304 – Period GeneratorNL412 – Pulse
NeuroLog AccessoriesAccessory KitsAdaptors & Adaptor CablesSockets (for cable mounting)Sockets (for panel mounting)Plugs (for cable mounting)Extension CablesCablesElectrode HoldersMiscellaneous AccessoriesNeuroLog System CasesNL900D – NeuroLog System CaseNL905 – Compact NeuroLog System Case
Pressure Transducers & AccelerometersPressure TransducersForce TransducersAccelerometersStimulator ModulesNL510 – Pulse BufferNL512 – Biphasic BufferNL800A Constant Current Stimulus Isolator
Application NotesSignal AmplificationTriggering & Pulse GenerationSignal Conditioning Filtering & ProcessingElectrical Stimulation
Isolated Amplifiers for EMG/EEG/EP D440 2/4-Ch. EMG AmplifierD360 8-Ch. Patient Amplifier D360R 4-Ch. Research AmplifierAmplifier Accessories D175 Electrode Impedance Meter D179 Performance Checker D360 Audio Interface D360 USB to Serial Adaptor D177 Bio-Feedback Unit
Peripheral Stimulators DS5 Isolated Bipolar Constant Current Stimulator DS7A & DS7AH HV Constant Current Stimulator DS7R HV Constant Current Research Stimulator DS8R Biphasic Constant Current Stimulator
Transcranial Cortical StimulatorsD185 MultiPulse Cortical Electrical StimulatorStimulator AccessoriesD188 Remote Electrode SelectorElectrode Connection HeadboxesTrigger CablesElectrode HandlesMiscellaneous Items
Neurodiagnostic AccessoriesIntraoperative Neuromonitoring (IONM) Electroecephalography (EEG) Electromyography (EMG)Nerve Conduction Study (NCS) Evoked Potential (EP)Axelgaard Stimulation ElectrodesTouch Proof Plugs Adaptors & Electrode Linkers
Cath SecureCATH-SECURE – OriginalCATH-SECURE – ExtendedCATH-SECURE PlusCATH-SECURE – Dual TabCATH-SECURE For KidsNG SECURE
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Urodynamic ConsumablesUrodynamics CathetersPump Infusion SetsTransducer Pressure DomesFemale Voiding AdaptorDuckbill ValvesSetguards3-Way Taps
£640.00 exc. VAT
Manufacturer's Net List Price
The DG2A Train Delay Generator small free-standing instrument has been designed for control of normal repetitive stimulation as well as for defining the Effective Refractory Period using a second, delayed pulse. The DG2A is especially useful as a frequency generator.
DS3 and DS7A isolated stimulators which have their own pulse duration controls can be used with our DS2A Train Generators and Delay Generators. The basic features of its predecessor the DG2 Trigger Generator are still included and have been extended to allow trains of pulses to be generated in response to input signals from other devices. The DG2A Train/Delay Generator has four operating modes which are detailed below:-
The Digitimer team are on hand to discuss the full range of Train Generators and Delay Generators we have on offer. Contact by emailing firstname.lastname@example.org for more information.
DG2A Train/Delay Generator
DG2A Train/Delay Generator App 1
DG2A Train/Delay Generator App 2
Publications which cite use of the Digitimer DG2A can be found on Google Scholar.
The unit is powered by a standard 9V PP3 battery, which can be replaced by removing the four case screws, separating the case halves and inserting in the battery holder.
The DG2A is a trigger source and as such is not designed for direct connection to human subjects, however, when used in conjunction with one of our isolated electrical stimulators it is perfectly suitable and safe for use in human research in healthy volunteers or patients. For example when used to trigger our DS7A stimulator, the DS7A itself provides the necessary patient protection.
Inside the DG2A there is a bank of jumper switches, some of which are for factory use, but several others allow you to adjust certain output parameters including the train duration and delay settings. It is also possible to change the DG2A trigger input and pulse output from an active high TTL to active low TTL.
The controls of the DG2A do not allow for absolute precision and while the dial can be positioned to 20Hz, the only way to verify the frequency would be to monitor the output on an oscilloscope or within data acquisition software. That said, if the dial is set to 20Hz, the actual output should be within 5% of the expected value.
Yes, the DG2A Power On LED flashes intermittently when the DG2A is switched on – this is not an indication that it is delivering an output, but having a flashing LED does reduce the battery use when the DG2A is switched on. Actual pulse output is shown by the amber LED in the output zone of the front panel.
A single DG2A cannot accomplish this, however, if you link two together you can set one to “free-run”, delivering a pulse indicating the start of each train and the second DG2A can be set to receive this pulse and output a burst of pulses in “train” mode. There is an application note that shows how this is done.
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