Arbiter Systems 120A, User Manual

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2 Specifications
2.1 Receiver Characteristics
2.1.1 Input Signal
Accepts GPS L1 C/A, Galileo E1B/C, GLONASS L1OF and BeiDou B1I on F-type connector.
2.1.2 Time Accuracy
± 100 ns rms when receiving 4 or more satellites.
2.1.3 Satellite Tracking
Seventy-two channel receiver simultaneously tracks 2 frequencies with the ability to synchronize to 72 satellites
(defaults: GPS/Galileo and GLONASS). GLONASS and BeiDou cannot be selected at the same time.
2.1.4 Acquisition
Receiver: 30 seconds
Output stabilization: 2 minutes
2.1.5 Antenna
Included, bulkhead mount, active (+5 VLNA power) GPS L1 frequency, TNC connector.
2.1.6 Antenna Cable
RG-174/U, 5 m (16 feet) included. Terminated with TNC and F-Type connectors.
2.2 Interface
The Model 120A interface consists of a F-Type antenna connector, 4 LED annunciators, and a twelve-position
pluggable 5 mm terminal strip on one panel with a micro USB connector, data LED and a recessed reset button on
the opposite panel.
Figure 2-1: Model 120A End Panels
2.2.1 Antenna Input
The antenna input is a F-type connector for active GPS/GNSS antennas and provides 5 V LNA power (100 mA
max.).
2.2.2 LED Annunciators
Locked (green): Illuminated when the clock is actively tracking and synchronizing to satellite signals.
Unlocked (red): Illuminated when the clock is not receiving satellite signals.
PWR (green): Illuminated when the clock is receiving sufficient DC power to operate the unit.
Fault (red): Illuminated when the clock detects a fault.