Bk-precision 4079 - Manual Manuel d'utilisateur Page 7
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1
Section 1
Introduction
1.1 Introduction
This manual contains information required to operate, program and test the Model 4076 and 4079 – 50 MHz DDS Arbitrary
Function Generators. This section covers the instrument general description, instrument specifications and characteristics.
1.2 Description
The Model 4076 and 4079 are versatile high performance arbitrary waveform generators. Arbitrary waveforms can be
programmed and generated with 14 bit resolution and up to 4,000,000 points length. Waveforms can be output in continuous,
triggered, gated or burst mode. AM and FM modulation combined with versatile Sweep capabilities make the unit suitable for a
wide range of applications. Editing is flexible and easy including auto increment, line draw and predefined waveform facilities.
The instrument can be remotely operated via the RS232 or GPIB interface and they are SCPI compatible.
1.3 Memory Architecture
The waveform memory consists of 4,000,000 points. The user can edit arbitrary waveforms in waveform memory and can specify
any data value in the range from -8191 to 8191 for any point in waveform memory (14 bit depth). Due to their large memory
bank, the 4076 and 4079 can essentially give the user greater freedom in selecting the size of their waveforms and the number of
waves they desire to generate, with the limit of 4,000,000 total points when added together.
For example, these generators can create a waveform with 100,000 points, another waveform with 500,000 points, a third
waveform with 400,000 points, and a fourth waveform with 3,000,000 points. These four waveforms total up to 4,000,000 points,
but essentially they can be referenced in the memory bank according to their starting point and their length. There are no
restrictions as to how many different waveforms you can store in the memory, so as long as the sum of the points of all the
waveforms do not exceed 4,000,000 points. To better illustrate this, refer to drawing below:
The following operations can be performed in the waveform memory:
- Insert and scale any of the following predefined waveforms:
o Sine
o Triangle
o Square
o Ramp up
o Ramp down
o Noise
1
4,000,000
Waveform 1
Waveform …
Waveform 2
Waveform 3
A pts.
B pts.
C pts.
D pts.
A pts. + B pts. + C pts. + D pts. ≤ 4,000,000 pts.
Point
Point
- Safety Summary 3
- Table of Contents 5
- Section 1 7
- Specifications 8
- Modulation Combinations 10
- Section 2 11
- 2.8 Signal Connections 12
- 2.9 RS-232 Connection 12
- 2.6 Power Requirements 12
- 2.7 Grounding Requirements 12
- 2.10 RS-232 Configuration 13
- 2.11 GPIB Address 14
- 2.12 GPIB Connections 14
- Section 3 15
- 3.2 Display Window 16
- 3.3 Front Panel Controls 17
- 3.4 Back Panel Controls 17
- 18
- Model 4076 18
- Model 4079 18
- 3.5 Output connectors 19
- 3.6 MENU Keys 19
- 3.6.1 PARAMETER Key 22
- 3.6.2 MODE Key 23
- 3.6.3 WAVEFORM Key 24
- 3.6.4 Arbitrary EDIT Menu 26
- 3.6.5 PULSE Menu 29
- 3.6.6 UTILITY Key 29
- 3.6.7 SWEEP Key 30
- 3.6.8 MODULATION Key 31
- 3.6.9 SETUPS Key 32
- 4,000,000 33
- 3.7 ON Key 34
- 3.8 Cursor Movement Keys 34
- 3.9 Rotary Input Knob 34
- 3.10 Power-On Settings 34
- 3.11 Memory 35
- 3.12 Displaying Errors 35
- 3.13.3 Setting the Output 36
- 3.14 Examples 37
- 3.14.8 Using Voltage Offset 41
- 4.1 Overview 43
- 4.2 Device State 44
- 4.4 Device Address 45
- 4.6 Block Data (GPIB Only) 46
- 4.8 Instrument Reset 46
- 4.9 Self Test 46
- 4.10 Command Syntax 46
- 4.11 Status Reporting 50
- 4.11.4 The Error Queue 51
- 4.11.5 Error Codes 51
- 4.12 Common Commands 54
- 4.13.1 SOURce Subsystem 58
- 4.13.1.2 Amplitude 60
- 4.13.1.3 Offset 60
- 4.13.1.5 Function 61
- 4.13.1.6 Point Rate 62
- 4.13.1.7 AM modulation 62
- 4.13.1.8 FM modulation 63
- 4.13.1.9 FSK modulation 65
- 4.13.1.10 Sweep control 67
- 4.13.1.11 PHASe adjust 68
- 4.13.1.12 PULSe setting 68
- 4.13.1.13 Duty Cycle 70
- 4.13.2 OUTPut Subsystem 70
- 4.13.2.1 Output State 71
- 4.13.2.2 Output Summing 71
- 4.13.3 Trigger Subsystem 71
- 4.13.3.1 Trigger Mode 71
- 4.13.3.2 Trigger Source 72
- 4.13.3.3 Burst Count 72
- 4.13.4 Arbitrary Subsystem 73
- 4.13.4.1 Point Rate 74
- 4.13.4.2 Address 74
- 4.13.4.3 Data 75
- 4.13.4.4 Line Draw 75
- 4.13.4.5 Clear 76
- 4.13.4.6 Copy 76
- 4.13.4.10 Start Address 78
- 4.13.4.11 Wavelength 79
- 4.13.4.12 Marker Address 79
- 4.13.4.13 Marker Length 79
- 4.13.4.14 Marker State 80
- 4.13.4.15 Save 80
- 4.13.5 Status Subsystem 80
- 4.13.5.1 Status Preset 81
- 4.13.5.2 Error Queue Read 81
- 4.13.5.3 Error Queue Enable 81
- 4.13.6 System Subsystem 84
- 4.13.6.3 SCPI Version 84
- 4.13.6.4 Security 85
- 4.13.6.5 Power-on Buffer 85
- 4.14.2 DCL - Device Clear 86
- 4.14.4 LLO - Local Lockout 86
- 4.15 SCPI Command Tree 87
- 4.15.3 :OUTPut Subsystem 88
- 4.15.4 :TRIGger Subsystem 88
- 4.15.5 :ARBitrary Subsystem 88
- 4.15.6 :STATus Subsystem 89
- 4.15.7 :SYSTem Subsystem 89
- 4.17.1 General 93
- Section 5 97
- 5.3 Performance Tests 98
- 5.3.3 Offset Accuracy 100
- 5.3.4 Sine Distortion 100
- 5.3.7 Operating Modes 101
- 5.3.10 GPIB Capability 103
- Performance Tests Results 104
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