74
Serial Communication and Command Set
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. See Table 9.3
Bit
Weight
Function
Bit
Weight
Function
0 (LSB)
1
OCXO Not Inst. (Set
to 1)
4
16
Out of Lock
1
2
Stabilized (stab. = 1)
5
32
Time Error
2
4
Power Supply Error
6
64
VCXO Error
3
8
IRIG-B Bus Fault
7
128
Receiver Failure
Table 9.3: System Status Information Chart
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, 1344. Table 9.4 gives the returned value and error category.
Value
Error
Value
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 9.4: Unlocked Time Quality
Summary of Contents for 1084A
Page 4: ...iv ...
Page 6: ...vi ...
Page 18: ...xviii LIST OF FIGURES ...
Page 24: ...4 Unpacking the Clock ...
Page 36: ...16 Connecting Inlet Power Input and Output Signals ...
Page 44: ...24 GPS Antenna and Cable Information ...
Page 114: ...94 Startup and Basic Operation ...
Page 123: ...B 4 Physical Dimensions 103 Figure B 1 Suggested Mounting of the AS0094500 Surge Arrester ...
Page 124: ...104 Using Surge Arresters ...
Page 134: ...114 Options List C 6 2 Option 06 Firmware Setup Figure C 3 Option 06 Firmware Setup ...
Page 142: ...122 Options List Figure C 5 Option 06 Output Jumper Settings ...
Page 158: ...138 Options List Figure C 13 Option 17 Board Layout and Jumper Locations ...
Page 163: ...C 13 Option 20A Four Fiber Optic Outputs 143 Figure C 14 Option 20A Jumper Locations ...
Page 170: ...150 Options List Figure C 16 Option 23 Internal Jumper Setup ...
Page 172: ...152 Options List Figure C 17 Option 27 Jumper Locations ...
Page 190: ...170 Options List Figure C 20 Option 29 Connector Signal Locations ...
Page 246: ...226 Options List ...