User Manual for AML Oceanographic BaseX2
19
• Is there a powerful wireless transmitter or microwave emitter nearby?
o Interference from such sources can cause a momentary loss of connection that
can cause Base•X2 to awaken.
o It may be necessary to relocate either Base•X2 or the source of interference if
the problem persists.
o In some cases, it is possible to solve this problem by changing the wireless
channel of either Base•X2 or the source of interference. The command to set
device channel is explained in the appendix.
Device fails to acquire a GPS lock, or takes longer than expected:
• Is the device oriented vertically?
• Is there a significant obstruction around the device?
• Is it cloudy, overcast, or raining, especially on the horizon?
Device is nonresponsive:
• Was the wireless network disrupted during a firmware version upload?
• Reset the firmware as described in Resetting to Factory Firmware earlier in this manual.
Instrument fails to communicate:
• Is the connector damaged?
• Check the cables
o Is the data/power cable connected to the instrument and computer?
o Are there any cuts in the cable?
o If using a cable other than an AML cable, it should be configured as a null
modem cable.
o If using multiple cable lengths, the extensions should not be configured as null
modem cables.
• Are the batteries dead? Try using external power.
• If using external power over a long cable, check the voltage drop over the cable. Measure
the voltage across a 10 watt, 27Ω, resistor across pins 1 and 4 of the cable. The voltage
must be above 8 volts.
• Are the communication settings in the program used on the computer correct?
o Comm port selection
o 8 bits
o 1 stop bit
o No parity
o No hardware flow control
o Baud rate set at 115200
• Are the communication settings in the instrument correct?
o Is the instrument set at a baud rate of either 38400 or 115200?
o Was the instrument set to only RS-232 or only RS-485 last time? If so, resume
communications in the required protocol.
o Was the instrument set to RX OFF last time? If so, a carriage return must be
sent to the instrument immediately after power is applied to interrupt this mode.
• Was the instrument set to monitor on power up mode? If so, a carriage return must be
sent to the instrument immediately after power is applied to interrupt this mode. To
interrupt monitor on power up, hold down the ENTER key while applying power to the
instrument.
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