Bird Technologies 4421 - Manual (Page 34)

Bird 4421 RF Power Meter
22
Error Status Word (U1) - The format of the error status word and the possible
error messages are shown in Figure 10. 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 21). All flags will revert to their non-error states after the U1
command is sent.
Figure 10 Error Status Word Format
Revision History Word (U2) - The format of the revision history word is
shown in Figure 11.
Figure 11 Revision History Word Format
Note: If Writable stores parameter has not been set, this command
responds only with -4420-.
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
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
IEEE-488 1978 compliance
IEEE-488 Bus address
* 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 7 8 0 6 – TERM