Maestro A2200-A User Manual download pdf (Page 29)

V1.0 – Aug-13

User’s Manual

Page 29 of 37

8.2 External Antenna

8.2.1 Recommended Parameters

General GPS active antenna specification:

Limitations:

 Supply voltage according to voltage fed into VANT pin (5 V max.)

 Supply current 50 mA (max.)

Recommendations:

 Gain ≥ 20 dB (should not exceed 35 dB)

 Noise figure ≤ 1.5 dB

The recommendations apply to the majority of active antennas that can be found in

the market. The quality and suitability of the GPS antenna chosen is off great

importance to the overall sensitivity of the GPS system.

The system design needs to reflect the supply voltage of the antenna. If the supply

voltage is equal to Vcc, then it could be connected to VANT. If the antenna requires a

different supply voltage, the antenna bias can be provided through the VANT pin.

8.2.2 Hints

Unused antenna inputs should be terminated with 50   20%. Do not feed the an-

tenna supply voltage into terminated antenna inputs.

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 35 36 37

No comments

Maestro A2200-A User Manual Page 29