CSAC View larger


CSAC GPS Disciplined Oscillator

More details

  • Unparalleled holdover: +/-1 µsec (typ 24hr period @25ºC)
  • Ultra low power consumption: ≤1.4W @25ºC (12V Vdd) 
  • Fast warm-up time: <110 seconds (@25ºC)
  • Industry leading 1PPS accuracy: +/-15ns to UTC RMS (1-sigma) 
  • Slim profile: 0.7" (H) x 2.5" (W) x 3.0" (L)
  • QUANTUM™ Series SA.45s Chip Scale Atomic Clock (CSAC) for holdover
  • Ultra low-g static sensitivity (typ 0.1ppb/axis) - ideal for man-packs
  • Maintains GPS lock with only one satellite in view

The QUANTUMTM SA.45s Chip Scale Atomic Clock (CSAC) GPS Disciplined Oscillator (GPSDO) is the preeminent solution for demanding mobile GPS applications. These include military man-pack radios that require very low-g static sensitivity, MILSATCOM terminals, avionics payloads for Unmanned Autonomous Systems (UAS) and high acceleration applications such as jet fighters. All of these applications are increasingly expected to deliver mission critical performance even in GPS-denied environments. Other applications include network timing in stationary applications such as base-stations.

The Symmetricom® CSAC GPSDO is an ultra low power, slim profile, unit with an industry-leading 1PPS accuracy. The standard product offering includes Symmetricom’s QUANTUM™ series SA.45s Chip Scale Atomic Clock, as its frequency reference, which enables unparalleled holdover capability, an ultra low-g static sensitivity, and a very fast warm up time of <110 s. The built-in GPS receiver is able to operate in a base station position-hold mode using an auto survey feature, which allows operation with just a single satellite in view, and hence improves timing stability. The unit can also be set to operate in highly-dynamic mobile environments with only a minimum loss in timing stability versus the position-hold mode.

Standard outputs, via a low-noise distribution amplifier, include four 10 MHz sine wave outputs, one 5 MHz CMOS output, and one 1 PPS output. Other standard features include; a 16x2 character LCD driver (display not included), and a phase noise filter. The QUANTUMTM SA.45s Chip Scale Atomic Clock (CSAC) GPSDO can be powered from standard aircraft or vehicle power with an 8V to 36V operating range, and includes reverse polarity protection. Alternatively the unit can be powered through a 5 volt mini-USB power supply.

Optional features include an extended operating temperature range (-40 ºC to +85 ºC), a 10MHz CMOS output, and the ability to delete the phase noise filter

CSACcontact us