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Digitimer DG2A Train/Delay Generator
The DG2A is a compact, free-standing,
battery powered instrument which can be used to generate trigger
pulses required for repetitive stimulation. Also featuring
DELAY controls, it is useful for determining nerve or axonal
Effective Refractory Period (ERP) through the production of
a delayed second pulse.
This small free-standing instrument
unit is especially useful as a frequency generator for use
with our DS2A, DS3 and DS7A isolated stimulators which have
their own pulse duration controls.
The basic features of it's predecessor the DG2 Trigger Generator
have been extended to allow trains of pulses to be generated
in response to input signals from other devices.
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Specifications:
Control: Four position rotary switch.
Movement of this control will immediately terminate any cycle
and keep it in a Reset state for about 1 second.
This is a useful feature should an exceedingly long cycle be
selected by accident.
Connector: BNC socket
Levels: TTL high (>1.5V), TTL low (<0.8V)
Polarity: Active High (GATE/TRAIN) and Positive edge (SINGLE)
or Active Low and Negative edge by Internal Jumper
Internal Jumper: Enable “Active Low” - allowing
for an Input that is Low during its active phase.
Connector: BNC socket
Signal: Positive going, 200µs pulse, TTL compatible pulse
(5V amplitude).
Connector: BNC socket
Signal: Positive going, 200µs pulse, TTL compatible pulse
(5V amplitude).
Control: Selection of only the Delayed pulse
(upwards) or both the Sync and Delayed pulses.
Indicator: Amber LED that flashes for each OUT output pulse.
Internal Jumper: Enable “Active Low” - giving
an Output that is Low during its active phase.
The front panel provides a check-box for marking
with a waterproof pen when enabled.
Control: ON/OFF toggle. OFF is down.
Consumption: <2mA
Internal: PP3 - (IEC-6LR61) style. Alkaline preferred
Battery Life: Approximately 250 Hours with Ever Ready 6LF22
or Duracell MN1604
Size: 188 x 110 x 60 mm (w h d)
Weight: 490 grams with battery fitted.
Please note that no accessories, other than a battery, are
supplied.
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