Bird 4421 RF Power Meter
24
Status
(Ux)
Function
Reads a status word and returns the information as a string. Set x to:
y
“0” for machine status.
y
“1” for error status.
y
“2” for revision history.
Remarks
After sending the status command, a status word is sent the next time
the unit is addressed to talk. To ensure the correct status is
transmitted, the status word should be requested as soon as possible
after the command is sent.
Machine Status Word (U0):
The format of the machine status word is
shown in Figure 20. The default values are also shown.
Error Status Word (U1):
The format of the error status word and the
possible error messages are shown in Figure 21. When an error
occurs, an error is also flagged in the status (serial poll) byte, and a
SRQ may be generated (See “SRQ Mask” on page 23). All flags will
revert to their non-error states after the U1 command is sent.
Figure 20
Machine Status
Word Format
Header
Measurement Function
Range
Prefix
Terminator
Trigger
SRQ Mask
EOI Response
TERM
–
4
4
2
0
–
F
C
R
Y
Y
P
Y
Y
T
T
1
M
0
0
K
Y
Figure 21
Error Status
Word Format
Header
Command Status (shown valid)
Command Option Status (shown valid)
Self-test results (shown fail)
TERM
4
–
4
2
0
V
C
M
V
C
0
F
L
–
Status
Meaning
Description
ICM
Invalid Command
Set when an illegal device-dependent
command (IDDC) such as V2 is
received. (V is illegal)
VCM
Valid Command
Set when no IDDC is received.
ICO
Invalid Command
Option
Set when an illegal device-dependent
command option (IDDCO) such as T6 is
received. (6 is illegal)
Содержание THRULINE 4021
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