1-3
Chapter 1, INTRODUCTION
1.3 Key Specifications and Benefits
The EG&G Instruments Model 7220 represents the latest in DSP Lock-in Amplifier
technology at an affordable price, and offers:-
n
Frequency range:
0.001 Hz to 120 kHz
n
Voltage sensitivity:
20 nV to 1 V full-scale
n
Current input mode sensitivities:
20 fA to 1 µA full-scale
20 fA to 10 nA full-scale
n
Line frequency rejection filter
n
Dual phase demodulator with X-Y and R-
θθθθθ
outputs
n
Very low phase noise of < 0.0001
o
rms
n
5-digit output readings
n
Direct Digital Synthesizer (DDS) oscillator with variable output amplitude
and frequency
n
Oscillator frequency sweep generator
n
Output time constant: 10 µs to 5 ks
n
8-bit programmable digital output port for system control
n
Two external ADCs, two external DACs
n
Full range of auto-modes
n
Standard IEEE-488 and RS232 interfaces with RS232 daisy-chain
capability
n
Dual back-lit liquid crystal display (LCD) with variable contrast control
n
32768 point curve storage buffer
Summary of Contents for 7220
Page 8: ...v i TABLE OF CONTENTS...
Page 12: ...1 4 Chapter 1 INTRODUCTION...
Page 76: ...5 36 Chapter 5 FRONT PANEL OPERATION...
Page 124: ...D 2 Appendix D CABLE DIAGRAMS Figure D 2 Interconnecting RS232 Cable Wiring Diagram...
Page 146: ...E 22 Appendix E ALPHABETICAL LISTING OF COMMANDS...
Page 154: ...Index 6 INDEX...
