Rigol DM3000 Series - DM3000 Principle Introduction

RIGOL
Service Guide for DM3000 Series
6-2
DM3000 Principle Introduction
The circuit of DM3000 series can be divided into floating circuit, grounding circuits and power
input.
1. The floating circuit includes current fuse, front panel signal input end (banana socket) and
measurement analog front-end which contains circuits such as the input protection of all
the measurement function, function switch, signal transform conditioning, A/D conversion
and control interface.
The structural schematic diagram of circuit from DM3000 Series is as follows:
Motherboard
（Front End Circuit）
（CPU）
Current Input Fuse Banana Socket
BNC
Board
LAN/GPIB
Board
（Except
DM30X1）
LC
D
Key
Board
USB
Board
Swiching Board
（
Only for DM30X4
）
Filter Board
Transformer
Power Input
Circuit
Floating
Circuit
Ground
Circuit
Figure 6-1 Circuit Diagram of DM3000 series