Atec Signal-Recovery-7280 - Manual

CatIss7Web:0710UK
www.signalrecovery.com
Model 7280
Wide Bandwidth DSP Lock-in Amplifier
0.5 Hz to 2 MHz operation
Voltage and current mode
inputs
Direct digital demodulation
without down-conversion
7.5 MHz main ADC sampling
rate
1 µs to 100 ks output time
constants
Quartz crystal stabilized
internal oscillator
Harmonic measurements to
32F
Dual reference, Dual
Harmonic and Virtual
Reference modes
Spectral display mode
FEATURES
APPLICATIONS
Scanned probe microscopy
Optical measurements
Audio studies
AC impedance studies
Atomic force microscopy
The model 7280 DSP Lock-in Amplifier is an exceptionally versatile instrument with
outstanding performance. With direct digital demodulation over an operating frequency
extending up to 2.0 MHz, output filter time constants down to 1 µs and a main ADC
sampling rate of 7.5 MHz it is ideal for recovering fast changing signals. But unlike some
other high frequency lock-ins, it also works in the traditional audio frequency band.
In addition to its excellent technical specifications, it is also very easy to use. The front
panel is dominated by a large electroluminescent display panel, used both to show the
instrument's outputs and for adjusting its controls via a series of menus. Controls are set
by a combination of the use of the keys surrounding the display and the numeric
DESCRIPTION
Main Display
Auto Functions Menu
keypad, while four cursor-movement keys
simplify use of the graphic display menus.
Users of the SIGNAL RECOVERY models
7260 and 7265 will find switching to the
7280 very easy, since we've designed it
with a similar menu structure. The only
significant changes are in some of the
control menus, where the better resolution
of the display allows both the controls and
the instrument outputs to be shown
simultaneously, for even faster feedback
on the effects of control adjustments.
Naturally, the instrument includes the extended operating modes like dual reference,
dual harmonic and virtual reference made popular by the 7260 and 7265, as well as the
spectral display mode used to aid reference frequency selection. It also includes GPIB
and RS232 interfaces for remote computer control and a range of auxiliary analog and
digital inputs and outputs. Compatible software is available in the form of a LabVIEW
driver supporting all instrument functions,
and the Acquire lock-in amplifier
applications software. The driver and a
free demonstration version of the
software, DemoAcquire, are available for
download from our website at
www.signalrecovery.com
In summary, if you need a lock-in capable
of working beyond the traditional audio
frequency band but still want the drift-free
performance that only digital demodulation
brings, then look no further - you have
found it in the SIGNAL RECOVERY Model
7280.
SIGNAL RECOVERY