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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:
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
D
U
O
Z
Measured data valid
Data range over
Underrange (dBm and dBr)
Overrange
Zero adjustment
STATUS
WATT
dBm
dBr
%
VSWR
dB50
dB75
VL50
VL75
Watt
dBm
dBr
%
VSWR
dBu, 50 W system
dBu, 75 W system
Volt, 50 W system
Volt, 75 W system
MODE
MRG1
MRG2
MRG3
MRG4
MRG5
HOLD
highest sensitivity 1
2
3
4
lowest sensitivity 5
RANGE
ML2430A OM 6-91
GPIB OPERATION ML4803A EMULATION COMMANDS
<CR><LF>
EXPONENT
STATUS
MODE
RANGE AVERAGE
SIGN
5 CHARACTER DATA
ALWAYS “_”
ALWAYS “E”
7
8910
11 12
13
14
15
16
17
18 19 20
21 22
6
5
4
3
21
Figure 6-5. OPW Data Output Format