Arbiter Systems 1200B, Operation Manual

Page: 122 / 218

104 RS-232C Command Set
True/False Condition
Command: / [ ii ? < t > / : < f > / ]
where:
< t > = True condition
< f > = False condition
ii : 01 = Locked; 02 = Status change; 03 = Locked with max accuracy; 04 = Fault; 05 = Daylight Saving
Time change pending; ; 06 = Unlocked LED status (whether Unlocked LED On/Off)
Ordinal Condition
Command: /
{
ii ? < 0 > / : , . . . , < n > / ; < e >
}
where:
< 0 >, < 1 >, . . . , < n > = ordinal position
< e > = Else condition
ii : 01 = Time Quality (13 possible ordinals); 02 = Time Quality for True Time
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format (5 possible); 03 =
Time Zone Indicator (3 possible, 0=DST active, 1=Not active, 2=UTC)
Binary Hex Value (worse case accuracy)
1111 F Fault-clock failure, time not reliable
1011 B 10 seconds
1010 A 1 second
1001 9 100 milliseconds (time within 0.1s)
1000 8 10 milliseconds (time within 0.01s)
0111 7 1 millisecond (time within 0.001s)
0110 6 100 microseconds (time within 10
− 4
s)
0101 5 10 microseconds (time within 10
− 5
s)
0100 4 1 microsecond (time within 10
−
6
s)
0011 3 100 nanoseconds (time within 10
− 7
s)
0010 2 10 nanoseconds (time within 10
−
8
s)
0001 1 1 nanosecond (time within 10
− 9
s)
0000 0 Normal operation, clock locked
Table 11.7: List of Possible Time Quality Levels, Ordinal 01
Symbol ASCII Character Accuracy
(space) 32 locked, maximum accuracy
. 46 Error < 1 microsecond
* 42 Error < 10 microseconds
# 35 Error < 100 microseconds
? 63 Error > 100 microseconds
Table 11.8: List of True Time Quality Levels, Ordinal 02
Using Ordinals and Conditionals
An ordinal returns an ASCII character or characters (e.g. 1, 2, 3,...., good, bad, etc.) for a requested value
(e.g. clock accuracy). A conditional returns an ASCII character or characters (e.g. 0, 1, locked, unlocked,
etc.) based on a true/false request (e.g. Is there a Fault?). Illustrated below are several examples of using
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For True Time Broadcast Mode, see Page 136