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3.2
Control Voltage Input
The BNC control voltage input In is connected to a differential amplifier to suppress common mode
voltages between the external signal source and the amplifier (ground loops). Two jumpers (W2, W5)
are provided on each amplifier module in order to adapt the control voltage input to the signal source.
W5 connects the input signal reference via 100Ω to the amplifier signal ground. W2 adjusts the
amplifier gain to the output impedance of the signal source.
W5
1-2
Floating signal source
Common mode voltage <1V
2-3
Grounded signal source (connected to PE)
Common mode voltage <5V
W2
1-2
Output impedance of signal source <1 Ω
2-3
Output impedance of signal source 50 Ω
3.3
Monitor Outputs
Two BNC monitor outputs provide actual values of output voltage and output
current, both of which are normalized to ±10 V.
The voltage monitor output V Mon receives its signal via a compensated voltage
divider and provides a scaled image of the output voltages. The frequency
response is linear up to well above the upper cut-off frequency of the
amplifiers. The frequency response of the I Mon current monitor output is
limited to about 9kHz in order to filter out the common mode ripple of the
internal high voltage sources.
The monitor outputs are buffered (output impedance: 2kΩ) and short-circuit-proof. They are able to
drive capacitive loads (coaxial cables), but are not designed to drive cables with a low-impedance
termination.
3.4
Differential Output Mode
Two amplifier modules can be configured to operate in a differential output mode. In this
configuration, only amplifier 1 (Master) receives the input signal from the signal source. Amplifier 2
(Slave) receives the input signal through the backplane of the subrack. The signal to amplifier 2 is
inverted (180° phase shift in respect to amplifier 1).
This mode can be used e. g. to differentially drive two deflection plates or to drive a floating load with
up to 8000V
.
PP
hivolt.de GmbH & Co. KG
Oehleckerring 40
D-22419 Hamburg
∙
RMS
RMS
Germany
+49 40 537122-0
∙
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Default
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+49 40 537122-99
info@hivolt.de
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www.hivolt.de
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