Spectracom TSync-PCIe - 3.12.1 RF Connector, Internal GNSS Receiver; 3.12.2 Electrical Characteristics, GNSS RF Signal; External GNSS Receiver; 3.13.1 Connector

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Accuracy horizontal position: <6 meters (50%) <9 meters (90%)

Accuracy altitude position: <11 meters (50%) <18 meters (90%)

3.12.1 RF Connector, Internal GNSS Receiver

The internal GNSS RFconnector supports the RFconnection between the internal GNSS

receiver and an external L1 antenna. It consists of a female SMA connector. A short male SMA

to female N cable made from RG-316 coax is provided to connect to the antenna RF cable.

NOTE – The provided cable should be used instead of an adapter. This relieves

strain on the connectors.

3.12.2 Electrical Characteristics, GNSS RF Signal

L1 GPS/GLONASS signals from antenna to on-board GNSS receiver

30mA @ +5V (±10%) provided to power antenna

3.13 External GNSS Receiver

3.13.1 Connector

A High-Density DB-15 connector is used to connect the external antenna (with its built-in GNSS

receiver) to the board.

3.13.2 Electrical Characteristics, Board to Receiver Transmission

RS-485 Differential Signal

+1.5 V to +2 V Common Mode Output Voltage

1.5 V min to 3.3 V max Differential Output Voltage Swing

3.13.3 Electrical Characteristics, Receiver to Board Transmission

RS-485 Differential Input

–7 V to +12 V common mode voltage input range, 200 mV

p-p

differntial voltage

threshold

CHAPTER 3 • Instruction Manual XYZ Rev. R

3.13 External GNSS Receiver