C.10 Option 17: Parallel BCD Output and Second RS-232C Port
127
C.10
Option 17: Parallel BCD Output and Second RS-232C Port
C.10.1
General Description
Option 17 for the standard Model 1084A/B/C and 1088A/B clocks expand the capabilities of the
instrument to include:
•
Either of the following:
a. Time-of-year output in Binary-Coded Decimal (BCD) format, with resolution down to
1 millisecond; or
b. Parallel Data output, with up to 48 bits that can be custom-configured at the factory
for specific applications;
•
A continuous 1 pulse-per-second (1 PPS) output, with the rising edge of a 10 millisecond-wide
pulse synchronous to the rising edge of 1 PPS/GPS;
•
A continuous 1,000 PPS (1 kPPS) square wave output, with rising edges synchronous to the
rising edge of 1 PPS/GPS;
•
Four pins of the output connector that can be configured with combinations* of the following:
a. Up to four digital signal outputs, the functions of which can be selected individually
from 18 choices.
b. Up to two analog signal outputs, the functions of which can be selected individually
from two choices.
c. An RS-232C serial communications port, which can use between two and four lines.
*Note:
Since these auxiliary functions must share four connector pins, certain limitations will
apply when selecting combinations:
•
Enabling any one (or more) of the digital signal outputs precludes four bits from the parallel
data output, if used;
•
Each analog signal output used precludes one of the digital signal outputs; if two analog signal
outputs are employed, only two digital signal outputs are possible. Also, each analog signal
output displaces one bit from the parallel data interface, if used;
•
A two- or four-wire RS-232C port configuration uses two or four of the data output lines, so
these lines become unavailable for digital and/or analog signal outputs, or for the assigned
data bits of the parallel output (if used).
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 ...