7.4 Connecting Outputs
61
that the rising edge is “on time” as compared with the signal from the Global Positioning System
(GPS). It has the same drive power as any other digital signal available from the 1088B. See
Figure 7.2 for a comparison between unmodulated IRIG-B and 1 PPS.
7.3.5
Programmable Pulse (PROG PULSE)
The Model 1088B has an independent programmable pulse feature that requires setting a jumper
on the main board and configuring the pulse mode through the SETUP menus or RS-232 port.
Programmable pulse modes include setting the pulse width (except for Single Trigger and Slow
Code modes) and time zone. To configure, please see Sections 5.2 and 6.7.
Prog Pulse Mode
Configured Feature
Seconds Per Pulse
X number of seconds between pulses, 0 – 60,000
Pulse Per Hour
Number of seconds after each hour, 0 – 3599
Pulse Per Day
Hour, Minute, Second, Fractional Seconds
Single Trigger
Day, Hour, Minute, Second, Fractional Seconds
Slow Code
ON or OFF
Pulse Polarity
positive– or negative–going pulse
Table 7.3: IRIG-B Code Designations
7.4
Connecting Outputs
All clocks come equipped with BNC female connectors, however if you are using twisted pair cabling,
you can use a BNC breakout. See the reference below
, or other similar adapter.
NOTE: If using a shielded, twisted-pair cable (like Belden 8760), DO NOT connect the cable shield
at the clock. Always connect a cable shield at the receiving equipment (IED) grounding point.
7.4.1
Attaching Cables to Screw Terminals
Some of the option boards mounted in the Model 1088B have screw terminals instead of BNC
connectors to connect wiring. To mount wiring to screw terminals, prepare the twisted pair cable
by stripping back at least 1/4” of the insulation and any shielding; DO NOT tin the bare wire with
solder. Tighten the screw down on the wire. Do not ground the shield to the Arbiter clock, rather
ground it at the receiving end.
7.4.2
How Far Can I Run IRIG-B Cabling?
Before laying cable to transmit IRIG-B over long distances, take time to consider the following
factors: (1) resistive losses in cabling, (2) electromagnetic interference, (3) propagation delays and
(4) installation and maintenance costs.
1
Pomona Electrics, www.pomonaelectronics.com, (800) 444-6785, (425) 446-6010, part no. 4969 and 4970
Содержание 1088A
Страница 4: ...iv ...
Страница 6: ...vi ...
Страница 18: ...xviii LIST OF FIGURES ...
Страница 23: ...1 4 Attaching Rack Mount Ears to 1088A B Series Clocks 3 Figure 1 2 Attaching Rack Mount Ears ...
Страница 24: ...4 Unpacking the Clock ...
Страница 32: ...12 Front and Rear Panels ...
Страница 38: ...18 Connecting Inlet Power Input and Output Signals ...
Страница 41: ...4 1 GPS Antenna Installation 21 Figure 4 2 Antenna Mounting Bracket Figure 4 3 Antenna Mounting with AS0044600 ...
Страница 46: ...26 GPS Antenna and Cable Information ...
Страница 48: ...28 Setting Internal Jumpers Figure 5 1 Model 1088B Main Board ...
Страница 76: ...56 The Setup Menus ...
Страница 112: ...92 Serial Communication and Command Set ...
Страница 127: ...B 4 Physical Dimensions 107 Figure B 1 Suggested Mounting of the AS0094500 Surge Arrester ...
Страница 128: ...108 Using Surge Arresters ...
Страница 137: ...C 5 Option 04 Parallel BCD Output 117 C 5 2 Option 04 Firmware Setup Figure C 2 Option 04 Firmware Setup ...
Страница 145: ...C 5 Option 04 Parallel BCD Output 125 Figure C 4 Option 04 Output Jumper Settings ...
Страница 146: ...126 Options List Figure C 5 Option 04 Board Layout and Jumper Locations ...
Страница 165: ...C 12 Option 17 Parallel BCD Output and Second RS 232 Port 145 Figure C 11 Option 17 Output Jumper Settings ...
Страница 166: ...146 Options List Figure C 12 Option 17 Board Layout and Jumper Locations ...
Страница 176: ...156 Options List C 14 5 Typical Network Configuration Figure C 15 Option 18 Network Configuration ...
Страница 187: ...C 16 Option 20A Four Fiber Optic Outputs 167 Figure C 22 Option 20A Jumper Locations ...
Страница 194: ...174 Options List Figure C 24 Option 23 Internal Jumper Setup ...
Страница 196: ...176 Options List Figure C 25 Option 27 Jumper Locations ...
Страница 214: ...194 Options List Figure C 28 Option 29 Connector Signal Locations ...
Страница 270: ...250 Options List ...