70 Serial Communication and Command Set
Broadcast Mode – EVENT DATA
Command: B3, O3
B3 configures the clock to broadcast from the main RS-232 port any event data at the time it is
recorded. O3 configures the clock to broadcast from the option RS-232 port any event data at the
time it is recorded.
Response: (Local) mm/dd/yyyy hh:mm:ss.sssssss nnnAL
C
(UTC) mm/dd/yyyy hh:mm:ss.sssssss nnnAU
C
Where: nnn = Event-Buffer Read Index Number
U = UTC Time, and L = Local Time
Broadcast Mode − STATUS
Command: B4, O4
B4 configures the clock to broadcast any status data from the main RS-232 port when it changes.
O4 configures the clock to broadcast any status data from the option RS-232 port when it changes.
NOTE: When a valid fault is detected, the specific status fault is broadcast (with Julian day, and
time) to the chosen serial port once. When the fault clears, another message is sent describing the
cleared fault.
Response: ddd:hh:mm:ss I=nn:nn X=nn:nn
C
(Updates whenever the status changes.)
Where:
I, Internal clock conditions
X, External clock conditions
nn:nn, Status byte(Hex).
The 2 digits preceding the colon describe the present condition of the instrument. The 2 digits
after the colon indicate the parameters, which have changed.
Bit Weight Fault Bit Weight Fault
0 1 Reserved 4 16 Out-of-Lock
1 2 Stabilized (=1) 5 32 Time Error
2 4 Reserved 6 64 VCXO tune Error
3 8 Reserved 7 128 Receiver Failure
Table 10.5: Fault Indications and Definitions
Broadcast Mode – EXT. ASCII
Command: B5, O5
B5 configures the clock to broadcast from the main RS-232 port, the time-of-day as ASCII using an
extended format prefaced with a time quality indicator (Q). O5 configures the clock to broadcast
the same data from the option RS-232 port. The start bit of a carriage-return is transmitted on
time. EXT. ASCII (or Extended ASCII) adds a time quality indicator at the start of the Standard
ASCII time string (including some spaces).
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