Model 1084A/B/C

The Arbiter Systems®, Inc. Model 1084A/B/C GPS Satellite-Controlled Clock provides the most-needed GPS system clock features in an economical package. Three versions allow you to match your requirements. The Model 1084A has four LEDs to monitor operating status. The Model 1084B adds an LCD setup/status display and keyboard. The Model 1084C adds a large (20 mm or 0.8 in.) LED time display.
In all versions, one BNC output provides modulated IRIG-B while another BNC output is jumper configurable for IRIG-B unmodulated or Programmable Pulse. Both outputs have substantial drive capability and can easily drive multiple loads wired in parallel. A third output is jumper configurable for either one pulse-per-second, IRIG-B unmodulated, or IRIG-B modified Manchester (IEEE Standard 1344 high-precision time code). This third output may also be wired (by a simple modification) to any of the other digital signals generated inside the Model 1084A/B/C. These signals include rates of 1 PPH, 1 PPM, 10 PPS, 100 PPS, 1 kPPS, 10 kPPS, 100 kPPS, 1 MPPS, 5 MPPS, and 10 MPPS; IRIG-E, H, and D; Programmable Pulse, or Locked to satellite. Programmable Pulse generates an output pulse every 1 to 60000 seconds, daily at a specified time, or at a specified time of year; pulse duration is 0.01 to 600 seconds. An optional fiber-optic output generates 1 PPS or IRIG-B in either unmodulated or modified Manchester format. Also, an event timer input measures time of occurrence of an applied pulse to 100 ns resolution. Up to 500 events may be stored.
The Model 1084A/B/C includes two Form C (SPDT) fail-safe relays, compatible with 129 Vdc digital fault recorder inputs. The first provides a LOCKED indication, and the second can be selected to the FAULT, 1 PPH, or Programmable Pulse functions.
Eight receiver channels are standard for best performance, especially in difficult locations. The internal backup oscillator is a digitally-compensated crystal oscillator (DCXO) accurate to 1×10-7 over temperature.
Power options include 85 to 264 Vac/110 to 275 Vdc with an IEC-320 detachable cordset, 110 to 275 Vdc terminal strip inlet with surge withstand, or 10 to 60 Vdc terminal strip inlet with surge withstand. The terminalstrip versions have a surge-withstand network designed to meet ANSI/IEEE C37.90-1 and IEC801-4 specifications. All power configurations may be retrofitted in the field.