FireFly-IIA User Manual - Jackson Labs Technologies, Inc.

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FireFly-IIA User Manual2 © 2012 Jackson Labs Technologies, Inc.
FireFly-IIA User Manual2Quick-StartInstructions2.1 Powering Up the UnitTo operate the unit, simply do the following two steps:1) Connect a 5V-compatible GPS antenna to connector J2.2) Connect +12V DC Power to pins 15, and 16 of power connector U3, ground to pins 12 and14 of U3.The unit will now lock to GPS (Red LED is blinking when satellites are being received) and willindicate proper lock when the Green LED goes on. Once the green LED is on, the unit will output10MHz with significantly better than 1ppb frequency accuracy.Please note that the GPS receiver establishes the internal antenna gain right after power-on, so forproper operation the GPS antenna should always be connected prior to turning on the +12V power.2.1.1 Major connectionsThe major connections and features of the FireFly-IIA PCB are shown in Figure 2.1.Figure 2.1 FireFly-IIA major connectionsISP ResetJumperPower and StatusConnector3x +12 dbm10MHz SineOutputsGPSAntenna© 2012 Jackson Labs Technologies, Inc. 3
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FireFly-IIA User Manual - Jackson Labs Technologies, Inc.

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