EG&G ORTEC 427 Instrukcja obsługi - Strona 13

Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Wzmacniacz EG&G ORTEC 427. EG&G ORTEC 427 20 stron. Delay amplifier

4-1

OPERATING INSTRUCTIONS

4.1

Initial Testing and Observation of Pulse Waveforms

Refer to Section 6.1 of this manual for information concerning testing perfor

mance and observing pulse waveforms.

4.2

Connector Data

CNl - INPUT

CNl is the INPUT BNC connector for the incoming pulse that is delayed, i.e.,

temporarily stored, in passing through the amplifier. The input impedance is

approximately 1100 ohms, dc coupled to ground. The input impedance may be

shunted at CNl by a fixed resistor to the characteristic impedance of the coaxial

cable feeding the connector. If the input is shunted, care must be taken to ensure

that the driving source can drive the terminated cable; this is particularly a problem

for 50-ohm coaxial cable. The input voltage rated range is 0 to ± 10 volts. The

voltage gain of the 427 is nominally unity.

CN2 - OUTPUT

CN2 is the OUTPUT BNC connector. The output driving impedance is approximately

one ohm and is short-circuit protected. If a higher output impedance is desired for

sending end termination of the coaxial cable, see Sections 3.3 and 5.3 of this manual

for modification instructions.

OUTPUT TEST POINT

There is an oscil loscope test point on the front panel for monitoring the signal on

the OUTPUT BNC connector. This test point has a 470-ohm series resistor con

necting it to the OUTPUT BNC connector.

POWER CONNECTOR

The power connector is a nuclear standard power connector.

4.3

Typical Operating Considerations

The 427 is typical ly used in a linear system after the main pulse shaping ampli

fier. It is also directly compatible with and can be driven from any of the

ORTEC 400 Ser ies linear output circuits. The input and output signal range is

rated from 0 to 10 volts, positive or negative. After the desired amount of

delay has been selected, the 427 output should be checked with an oscilloscope

to ensure that the dynamic range of the unit is not exceeded. The gain of the

427 is nominally unity, but it increases to approximately 1 .1 when al l of the

delay (4.75 microseconds) is selected.