Measurement-computing DAC488 v.1 Manuel d'utilisateur Page 90
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84 DAC488 Commands DAC488 User’s Manual
V - Value Output
TYPE
Port Command
SYNTAX
Vval
Writes volts value for selected DAC port, where
val
is a value between -10 and
+10.
V#bits
Writes bit value for selected DAC port, where
val
is a value between -4095 and
+4095.
V#$hexZ
Writes hexadecimal bit value for selected DAC port, where
val
is a value
between F001 and +0FFF (-4095 and +4095).
V?
Returns current range and value for selected port in the format specified by the
Output Format (
On
) command.
DESCRIPTION
The Value Output command is used to program a voltage value to the selected DAC port. A voltage may be specified
in any of three formats:
• Volts: V7.5 or V0.75E+1 (7.5 volts)
• Decimal bits: V#3000 (3000 x 2.5 mV = 7.5 volts)
• Hexadecimal bits: V#$BB8Z ($BB8 = 3000, which is also 7.5 volts)
The bit resolution is: 250 µV/bit, 1.25 mV/bit and 2.5mV/bit for the ±1 volt, ±5 volt and ±10 volt ranges respectively.
Notes: (1) When programming in bits, Autorange must be disabled (A0). The voltage output when programming in
bits will depend on the range selected. Factory default value is zero volts (V+00.00000), Ground range (R0).
(2) When programming in hexadecimal bits, the hexadecimal number must be preceded by a $ and followed
by the letter Z.
EXAMPLE
PRINT#1,"CLEAR09"
Line 1: Reset the DAC488.
PRINT#1,"OUTPUT09;C0 P1
A0 R2 V4 X"
Line 2: Select Direct Control mode, select port 1, disable autoranging, select
±5 volt range, output 4 volts. The DAC488 will output 4 volts on Port 1.
PRINT#1,"OUTPUT09;C0 P1
A0 R1 V#3200 X"
Line 3: Select Direct Control mode, port 1, disable autoranging, select ±1 volt
range, output 0.8 volts (voltage specified in decimal bits). The DAC488 will
output 0.8 volts on Port 1. (3200 x 250 µV = 0.8 volts)
PRINT#1,"OUTPUT09;C0 P1
A0 R2 V#3200 X"
Line 4: Select Direct Control mode, port 1, disable autoranging, select ±5 volt
range, output 4 volts (voltage specified in decimal bits). The DAC488 will
output 4 volts on Port 1. (3200 x 1.25 mV = 4 volts)
PRINT#1,"OUTPUT09;C0 P1
A0 R3 V#3200 X"
Line 5: Select Direct Control mode, port 1, disable autoranging, select ±10
volt range, output 8 volts (voltage specified in decimal bits). The DAC488
will output 8 volts on Port 1. (3200 x 2.5 mV = 8 volts)
- User's Manual 1
- Introduction to this Manual 3
- Table of Contents 4
- 7 - DAC488 Commands 5
- 8 - Troubleshooting 5
- A - Appendix 5
- DAC488 Overview 1 7
- Accessories 8
- Specifications 8
- DAC488 Setup 2 11
- Hardware Setup 12
- Default Settings 13
- Mode Selection 13
- Analog Output Ports 13
- Digital I/O Port 14
- DAC488 Power & Assembly 3 19
- Rack Mount 23
- Bench Top 23
- Power-Up Activation 24
- CAUTIONCAUTION 24
- Programming Examples 25
- Performance Verification 26
- DAC488 Operation 4 29
- Port Triggering 30
- Internal Buffer 32
- Control Modes 34
- Waveform Control Mode 35
- Multiple Port Synchronization 36
- User-Defined System Defaults 39
- IEEE 488 Bus Support 39
- Bus Commands 40
- Bus Addresses 40
- Bus Terminators 40
- IEEE 488 Background 5 41
- Bus Lines & Bus Commands 42
- Handshake Lines 43
- Data Transfer Lines 43
- Bus Command Groups 44
- More On Service Requests 45
- DAC488 Calibration 6 47
- Manual Calibration Procedure 48
- BASIC Calibration Program 49
- DAC488 Commands 7 57
- Command Groups 59
- Command Summary 60
- Command Reference 63
- @ - Trigger On Command 64
- A - Autorange 65
- B - Buffer Data 66
- C - Control Mode 67
- D - Digital Output 69
- E? - Query Error Status 70
- F - Buffer Definition 72
- G - GET Trigger Mask 73
- H - Offset Calibration 74
- I - Interval 75
- J - Gain Calibration 76
- K - End-Or-Identify Control 77
- L - Buffer Location 78
- M - Service Request Mask 79
- N - Number of Cycles 80
- O - Output Format 81
- P - Port Select 82
- Q - External Trigger Mask 83
- R - Range Select 84
- S - System Defaults 85
- T - Command Trigger Mask 86
- U - User Status 87
- V - Value Output 90
- W - Test 91
- X - Execute 92
- Y - Bus Terminator 93
- ? - Query 94
- Serial Poll Status Byte 95
- Troubleshooting 8 97
- Query Error Status 98
- Appendix A 99
- IEEE 488 Bus Commands 100
- ASCII Codes 101
- ASCII Code Details 103
- Decimal Values 32 to 63 – LAG 105
- Decimal Values 64 to 95 – TAG 106
- Abbreviations 112
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