Avtech AVO-6A1-B, Инструкция по эксплуатации

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GENERAL INFORMATION
AMPLITUDE CONTROL
The AVO-6A1-B consists of two parts, the mainframe and the output module. The
mainframe is a voltage pulser, which generates up to 50V (V
OUT
).
The output module contains a 50Ω series resistance, and packaged diodes may be
soldered to the output terminals of this module. The diode load is connected in series
with the internal resistance, so that the current through the diode is normally given by:
I
DIODE
= (V
OUT
– V
DIODE
) / 50Ω
where V
DIODE
is the voltage drop across the diode. These values must be selected such
that I
DIODE
never exceeds 1A.
The functional equivalent circuit of the output module is shown below:
Output Module Functional Equivalent Circuit
An additional resistance (R
MON
) can be placed in series with the diode load, for current
monitoring purposes. In this case, the diode current is given by:
I
DIODE
= (V
OUT
– V
DIODE
) / (50Ω + R
MON
)
Alternatively, a fast current probe may be used to monitor the current waveform.
Factory testing is conducted using an Integrated Sensor Technologies model 711S
current probe (https://www.isensortech.com/).
For chip-level testing, the output module is not used. In this case, a user-supplied
resistance of 50 Ohms should be connected in series with the chip, near the chip, and
the voltage waveform from the mainframe should be connected to the resistor/diode
series combination using coaxial cabling and/or coaxial probes. Care must be taken to
19
450 Ω
50 Ω
DIODE
LOAD
I
OUT
,
1A MAX.
OUTPUT MODULE
MONITOR
OUTPUT
(-M OPTION)
INPUT FROM
MAINFRAME
(UP TO 50V)