Arbiter Systems 1092A, Operation Manual, Page: 96 / 214

78 Serial Communication and Command Set
Response: I=nn:nn X=nn:nn
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Format: I = internal clock conditions
X = external clock conditions
nn:nn = hexadecimal representations of the status byte.
The two digits preceding the colon describe present condition of the instrument.
The two digits after the colon indicate the parameters that have changed.
Time Quality
Command: TQ
TQ returns a single ASCII character (0, 4–9, A, B, F) indicating estimated worst-case time quality,
which follows the IEEE Standard, P1344. Table 10.7 gives the returned value and error category.
Response: h
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Value, h Time Error Value, h Time Error
0 Locked, max. Accuracy 8 Unlocked, accuracy < 10 ms
4 Unlocked, < 1 us 9 Unlocked, < 100 ms
5 Unlocked, < 10 us A Unlocked, < 1 s
6 Unlocked, < 100 us B Unlocked, < 10 s
7 Unlocked, < 1 ms F Clock failure
Table 10.7: Unlocked Time Quality
10.2.6 Local / Daylight Saving Time Setup Commands
Return Daylight Saving/Summer Time Settings
Command: 0DT
0DT returns the current Daylight Saving / Summer Time settings to the connected RS-232 port
(Modes: OFF, ON, or AUTO).
Response: Mode :AUTO
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START :02:00 Second SUN of MAR
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STOP :02:00 First SUN of NOV
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Set Daylight Saving/Summer Time Mode
Command: 1,mDT
1,mDT activates the Daylight Saving mode, where m = 0, 1, 2, with 0 = OFF, 1 = ON, and 2 =
AUTO. When OFF this time adjust feature does not add the specified offset to local time display
and output. With m = 1 (ON), the Daylight Saving / Summertime feature is always on. With m
= 2, the Daylight Saving / Summertime feature will automatically change at the specified dates