OVERVIEW
9
OVERVIEW
This chapter describes the GPD-3303 series in a
nutshell, including its main features and front /
rear panel introduction. After going through the
overview, follow the Setup chapter (page19) to
pro
perly power up and set operation environment.
Introduction
Overview
GPD-3303, the regulated DC power supply series,
are light weight, adjustable, multifunctional work
stations. They have three independent outputs:
two with adjustable voltage level and one with
fixed level selectable from 2.5V, 3.3V and 5V. The
GPD-3303 series can be used for logic circuits
where various output voltage or current are
needed, and for tracking mode definition systems
where plus and minus voltages with insignificant
error are required.
Independent /
Tracking Ser ies /
Tracking Parallel
The three output modes of GPD-3303 series,
independent, tracking series, and tracking parallel,
can be selected through pressing the TRACKING
key on the front panel. In the independent mode,
the output voltage and current of each channel are
controlled separately. The isolation degree, from
output terminal to chassis or from output terminal
to output terminal, is 300V. In the tracking modes,
both the CH1 and CH2 outputs are automatically
connected in series or parallel; no need to connect
output leads. In the series mode, the output
voltage is doubled; in the parallel mode, the
output current is doubled.
GPD-3303 Series User Manual
10
Constant Voltage/
Constant Current
Except for CH3, each output channel is completely
transistorized and well-regulated, and works in
constant voltage (CV) or constant current (CC)
mode. Even at the maximum output current, a
fully rated, continuously adjustable output voltage
is provided. For a big load, the power supply can
be used as a CV source; while for a small load, a
CC source. When in the CV mode (independent or
tracking mode), output current (overload or short
circuit) can be controlled via the front panel. When
in the CC mode (independent mode only), the
maximum (ceiling) output voltage can be
controlled via the front panel. The power supply
will automatically cross over from CV to CC
operation when the output current reaches the
target value. The power supply will automatically
cross over from CC to CV when the output voltage
reaches the target value. For more details about
CV/CC mode operation, see page18.
A
utomatic
tracking mode
The front panel display (CH1, CH2) shows the
output voltage or current. When operating in the
tracking mode, the power supply will
automatically connect to the auto- tracking mode.
Dynamic load
When used in audio production lines, the power
supply will provide a continuous or dynamic load
connector. When the connectors are connected to
the position “ON”, a stable DC current power will
be provided for audio power amplifiers.
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