Digitimer DG2A Train Delay Generator

You are buying one used DG2A Train Delay Generator. This equipment model DG2A was removed from working laboratory, it is cleaned well and been tested by a professional technician, it comes as package of power cable, pair of BNC connector and guaranteed to be fully operational.

Features are:

• Simple TTL trigger source for our range of stimulators.
• Battery powered (single 9V, PP3).
• Four operating modes (Train, Gated, Free-run, Single).
• Delayed output for study of effective refractory period.

The DG2A can be triggered by other device via the input BNC socket, this is useful when a single external TTL trigger pulse needs to be converted to a pair of pulses with adjustable delay or pulse train, non-delayed and or delayed trigger pulses arise from the two output BNC socket (will equipped with this DG2A).

The DG2A Train Delay Generator is powered by single 9V, PP3 battery which provides a long working life, once switched on the three LED light will brief light up and power LED will flash. This generator has four operating modes as train, gated, free-run and single.

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: -

• Train – In TRAIN mode, a regular button press or TTL compatible trigger received at the IN socket of the DG2A is translated into a SYNC pulse train with a pulse repetition rate and train duration determined by the REPETITION and DURATION settings. The DELAY dial allows the introduction of a delayed pulse after each SYNC pulse which can be detected at the OUT-1/OUT-2 output.
• Gated – In GATED mode, the DG2A will output a train of pulses at the SYNC socket while the input at the IN socket is TTL high. This allows the operator to GATE the train of pulses on and off with an external device. The pulse repetition rate is determined by the REPETITION setting. The DURATION control has no function in this mode. The DELAY dial allows the introduction of a delayed pulse after each SYNC pulse, which can be detected at the OUT-1/OUT-2 output.
• Free-run – In FREE-RUN mode, the DG2A will continuously output SYNC pulses with a pulse repetition rate determined by the REPETITION setting while the unit is ON. The DURATION control has no function in this mode. The DELAY dial allows the introduction of a delayed pulse after each SYNC pulse which can be detected at the OUT-1/OUT-2 output.
• Single – In SINGLE mode, a single TTL compatible trigger received at the IN socket or push-button press is translated into a single SYNC pulse. The REPETITION and DURATION controls have no function in this mode. The DELAY dial allows the introduction of a delayed pulse after each SYNC pulse which can be detected at the OUT-1/OUT-2 output part of the DG2A.

• 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, In Active Low an external contact closure can be used.
• Push-button: Has same function as a valid input signal.
• Indicator: “TOO FAST” Red LED that flashes if a Trigger is received whilst the unit is busy.

• Total range: 10 ms - 12 seconds in three overlapping ranges
• Control: Single turn control marked 1 - 12s with intermediate integer panel marks
• Accuracy: ±1% at '1' and '12' marks, ±5% at intermediate marks
• Multiplier: x0.01 ; x0.1 ; x1
• Internal Jumper: Enable “x10” - giving a 100 ms - 120 s total range