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427A delay amplifier

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Brief description:TheORTECModel427ADelayAmplifier: Variable delay for linear or logic signals Provides arrival time alignment functionality for pulses in coincidence and gating systems Delay range: 0 to 4

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Detailed introduction

The ORTEC Model 427A Delay Amplifier:

Variable delays for linear or logic signals
Provides arrival time alignment capabilities for pulses in coincidence and gating systems
Delay range: 0 to 4.75 μs
DC coupled
Rise time ≤400 ns

The ORTEC Type 427A delay amplifier is suitable for any general purpose variable delay of linear or logic signals in the range 0.25 to 4.75 μs.

information +
- 427A Brochure
- 427A Brochure (A4)
- 427A Manual
More information +

Any signal of polarity and amplitude up to 10 V is delayed by the selected time and reproduced at the output. Consists of two outputs, one with a nominal impedance of 1 Ω and the other with a nominal impedance of 93 Ω.

Convenient switch-selectable delay steps normalize time between two or more signal paths to simplify tuning of coincidence and gating systems. Each signal experiences a normal delay as it travels through the signal path. The Model 427A can delay the earlier of two signals so that the pair coincides with subsequent analysis.

The input impedance is not affected by the selected delay, so no signal loading changes occur. The DC-coupled input is provided through a buffer amplifier, eliminating interference from the delay-select network. Input impedance is greater than 1 kΩ.

Because the instrument is DC coupled, the Model 427A can maintain very high count rates without distortion. This, together with the fact that the gain is 1 from input to output, ensures that every signal fed through it has a controlled delay.

Specifications +

Performance

Gain

Unity gain ± at zero delay2％。

Gain change with delay

Any combination of delays (1 μs DRCshaped pulse) is+10％，-2％。

Feedthrough and delay ripple

<2％（1 μs DRCshaped pulse).

Delay line tolerance

±5％。

nonlinear

from0.1to10 V, integral nonlinearity<±0.05％。

temperature instability

amplifier gain drift<±0.01％/°C; for each μ usedsDelay is expected-0.013％/°Cadditional drift.

Rise time and bandwidth as a function of delay

delay

rise time (ns）

Bandwidth (MHz）

0.25

0.5

1.0

2.0

3.0

4.0

4.5

4.75

280

290

310

340

360

370

380

400

1.25

1.20

1.13

1.03

0.972

0.945

0.920

0.875

working temperature

0to50°C。

control

linear delay	Any combination of:0.25, 0.5, 1.0, 1.0, and2.0 µs.
Minimal (zero) delay	60 ns。
delay	4.75 µs。

Input

polarity	Positive or negative.
Signal range	±10 Vlinear range.
Input impedance	>1 kΩ, DC coupled.
connector	front panelBNC。

Output

Amplitude	Equal to input pulse amplitude; linear range0to±10 V；0to±11 V。
Output impedance	〜1 Ω front panel and93 Ω rear panel.
connector	Front and rear panelsBNC。