Special Cases

For a specialized application or custom installation, GNSS antennas and coaxial cables other than those offered by NovAtel may be preferred. In these cases, extra care must be taken to ensure the RF equipment being used meets the receiver’s RF input signal range requirements. The sections that follow provide recommendations for special cases that may occur with the use of non-NovAtel accessories, as highlighted in the Table: Special Cases.

Special Cases
Case	Related Section
The combined gain of the RF equipment is lower than 15 dB (20 dB if HDR Mode is enabled): GAIN_ANTENNA - LOSS_CABLE - LOSS_OTHER < 15 dB	Low Input Gain
The combined gain of the RF equipment is higher than 40 dB: (55 dB for receivers using firmware OEM7.04 or later) GAIN_ANTENNA - LOSS_CABLE - LOSS_OTHER > 40 dB	High Input Gain
The combined current draw of the RF equipment is higher than 200 mA: I_ANTENNA + I_OTHER > 200 mA	Insufficient Current Available
The antenna requires an input voltage other than +5.0 VDC. (+3.3 VDC for OEM7600 receivers)	In-Line Amplifier and Antenna Powered by Separate Supplies
A single antenna must supply a GNSS RF signal to multiple receivers.	Single Antenna Supplying Multiple Receivers
The cables available are not long enough.	Insufficient Cable Length