DP-304A, Rev. 091615
Warner
Instruments
A Harvard Apparatus Company
5
CONTROL DESCRIPTION
The front panel of the
DP-304A
houses the
TEST SWITCHES
,
an INPUT
OFFSET CONTROL
, the
HIGH PASS
FILTER
and
LOW PASS FILTER
controls, a
GAIN CONTROL
,
OUTPUT
BNC
,
and
POWER SWITCH
.
The
CIRCUIT
and
CHASSIS GROUNDS
are located on the rear panel of the
DP-304A.
The power
cord attachment and fuse are also located on the rear panel.
Front panel
Offset Control
The INPUT
OFFSET CONTROL
provides DC offset to the amplifier inputs. The instrument is
capable of providing input offsets up to ±600 mV in either AC or DC modes.
C
LIPPING LIGHTS
indicate clipping of the amplifier output. Two LEDs are provided to indicate
clipping
high
or clipping
low
. Clipping offsets can be adjusted using the
OFFSET CONTROL
. The
OUTPUT BNC
is also located in this section and provides connection to a chart recorder,
oscilloscope or data acquisition system.
High-pass filter
The
HIGH
-
PASS FILTER
sets the low frequency limit of the amplifier from DC to 300 Hz in 6
steps of
DC, 0.1, 1, 10, 100,
and
300 Hz
.
While placing the amplifier in
DC
mode disables the high-pass filter, all other controls
remain active.
Low-pass Bessel filter
The 2-Pole
LOW
-
PASS BESSEL FILTER
sets the high frequency limit of the amplifier from 100
Hz to 50 kHz in 6 steps of
100, 500, 1000, 5000, 10,000,
and
50,000 Hz
.
Gain Control
The gain control sets the overall system gain from 10 to 10,000 in 4 steps.