GPIB OPERATION

ML4803A EMULATION COMMANDS

OPW

Request for channel reading.

Remarks: Outputs measuring condition, measured data, and status. CR and LF codes are automatically output and executed after each line of 22 ASCII characters when the OPW command is used. The format of the returned data is:

 

1

 

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STATUS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SIGN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODE

 

 

 

 

RANGE

 

 

 

 

AVERAGE

 

 

 

5 CHARACTER DATA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<CR><LF>

EXPONENT ALWAYS “_” ALWAYS “E”

Figure 6-5.OPW Data Output Format

The data output codes are as shown in the table below. See the next page for measured data output examples.

Output Code

Contents

Function

 

 

 

V

Measured data valid

STATUS

D

Data range over

 

U

Underrange (dBm and dBr)

 

O

Overrange

 

Z

Zero adjustment

 

 

 

 

WATT

Watt

MODE

dBm

dBm

 

dBr

dBr

 

%

%

 

VSWR

VSWR

 

dB50

dBu, 50 ￿ system

 

dB75

dBu, 75 ￿ system

 

VL50

Volt, 50 ￿ system

 

VL75

Volt, 75 ￿ system

 

 

 

 

 

HOLD

RANGE

MRG1

highest sensitivity 1

 

MRG2

2

 

MRG3

3

 

MRG4

4

 

MRG5

lowest sensitivity 5

 

ML2430A OM

6-91

 

 

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Image 178
Anritsu ML2430A operation manual Opw, Contents