Antenna power out

Applicable receivers:  BD940 | BD940-INS | BX940

Power output specification

For the BD940-INS receiver module and the BX940 receiver enclosure, these output 5 V DC to power the antenna. This output voltage is not adjustable.

For the BD940 receiver module, the antenna DC power is supplied directly from pin 3 on the 80-pin connector.

The antenna output is rated to 10 V and can source a maximum of 150 mAmps.

Short-circuit protection

The unit does not have any over-current/short circuit protection related to the Antenna bias. Short circuits may cause damage to the antenna port bias filtering components if the sourcing supply is not current-limited to less than 150 mAmps.

Power consumption

This section provides details on power consumption for the BD940 module when configured to different operating modes. The testing environment is considered as ideal and therefore these numbers are for reference purposes only.

NOTE – It is important to consider the following caveats when using these numbers for integrating the BD940 receiver module into a larger system:

  1. Testing was done by placing the module on the Trimble BD940 evaluation board.

  2. Voltage Input – 12 V DC to BD940 evaluation board.

  3. Firmware Release – v5.33.

  4. Antenna – Zephyr II Geo with power LNA.

  5. Ethernet – Enabled with active embedded web interface.

  6. RS-232 – Port speed 230,400 bps.

  7. Output Protocol – NMEA @ 20 Hz (GGA, GST, and GSV).

  8. RTK Navigation.

  9. sCMRx Over ethernet.

  10. Ambient Temp: 25 °C.

Legend Test Profile

  • Test 1 L1 L2 RTK @ 20 Hz over RS-232 = 2.32 W Min and 2.40 W Max

  • Test 2 L1 L2 G1 G2 RTK @ 20 Hz over RS-232 = 2.36 W and 2.47 W Max

  • Test 3 L1 L2 G1 G2 SBAS RTK @ 20 Hz over RS-232 = 2.36 W Min and 2.47 W Max

  • Test 4 L1 L2 G1 G2 SBAS L5 RTK @ 20 Hz over RS-232 = 2.55 W Min and 2.73 W Max

  • Test 5 L1 L2 G1 G2 SBAS L5 Galileo RTK @ 20 Hz over RS-232 = 2.60 W Min and 2.76 W Max

  • Test 6 L1 L2 G1 G2 SBAS L5 Galileo RTX over L-Band 20 Hz over RS-232 = 2.77 W Min and 2.95 W Max

  • Test 7 L1 L2 G1 G2 SBAS L5 Galileo B1 B2 RTK @ 20 Hz over RS-232 = 2.65 W Min and 3.07 W Max