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T-RAD-DB15--USB Instruction Manual
Version 2.1
December. 2012
3
TABLE OF CONTENTS
1.1
GENERAL INFORMATION................................................................................................................... 8
1.1.1
System Overview ...................................................................................................................... 8
1.1.2
Specifications ............................................................................................................................ 8
1.2
Lock In Amplifier Theory of Operation ............................................................................................. 9
1.2.1
Mathematical Description of a Lock In Amplifier. .................................................................... 9
1.2.2
Time Domain Description of a Lock In Amplifier. ................................................................... 11
1.2.3
Frequency Domain Description of a Lock In Amplifier. .......................................................... 14
1.3
Communications with Host PC ....................................................................................................... 15
1.4
Data Format .................................................................................................................................... 18
1.5
Instrument Connections ................................................................................................................. 18
1.6
Using the Instrument ...................................................................................................................... 19
1.7
Using the Applications Software ..................................................................................................... 20
1.7.1
The Main Display Panel ........................................................................................................... 20
1.7.2
The Digital Display ................................................................................................................... 20
1.7.3
Digital Controls........................................................................................................................ 21
1.7.4
Data Collection ........................................................................................................................ 21
1.7.5
Log to File ................................................................................................................................ 21
1.7.6
Range ...................................................................................................................................... 21
1.7.7
Filter Tau ................................................................................................................................. 21
1.7.8
Null .......................................................................................................................................... 21
1.7.9
Batch Size ................................................................................................................................ 21
1.7.10
Reset ....................................................................................................................................... 22
1.7.11
Auto Reset ............................................................................................................................... 22
1.7.12
Sample Collection ................................................................................................................... 22
1.7.13
Collection Mode ...................................................................................................................... 22
