Bird Technologies 4421 - Manual (Page 44)

Bird 4421 RF Power Meter
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Machine Status Word (U0) - The format of the machine status word is shown
in Figure 13. The default values are also shown.
Figure 13 Machine Status Word Format
Note: This command sets the unit to the settings that were last
issued remotely (through RS-232 or GPIB). Therefore, it will over ride
any manual changes selected at the front panel of the unit.
Error Status Word (U1) - The format of the error status word and the possible
error messages are shown in Figure 14. All flags will revert to their non-error
states after the U1 command is sent.
Figure 14 Error Status Word Format
Revision History Word (U2) The format of the revision history word is shown
in Figure 15.
Figure 15 Revision History Word Format
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)
VCO Valid Command Option Set when no IDDCO is received.
PS Self-test Pass Set when a self-test has been initiated by the J0
command and the test result is acceptable.
FL Self-test Fail Set when the self-test has failed. (This is the
default condition.)
Header
Measurement Function
Range
Prefix
Terminator
Trigger
XON / XOFF
TERM – 4 4 2 0 – F C R Y Y P Y Y T T 1 X 0
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 –
Header
Writable stores
Software Rev level
Hardware Rev level
Interface standard
* YY is replaced with current software revision level.
** ZZ is replaced with current hardware revision level.
* **
4 – 4 2 0 X X X X X X Y Y Z Z – TERM RS-232