Instruction manual
025-9209 49
TROUBLESHOOTING GUIDE
OVERVIEW
In case of installation or operational difficulty, call Zetron at (425) 820-6363. Please have the
serial number of the unit and/or the Zetron order number. If the call is made from the
installation site by the installer or radio technician, the problem can usually be solved over
the telephone.
Some commonly encountered problems can be solved by following the recommendations
below.
Problem:
Unit will not communicate with PC or dumb terminal.
Recommendations:
Make sure you are using some communications software such
as Cross-Talk, Pro-Comm, Kermit, or ZCU or you are using a
dumb terminal. You cannot access the programming mode
directly from DOS.
Verify the baud rate at 4800, 8 bit, no parity, 1 stop bit with
echo off.
Verify that you have specified the correct communications
port.
You should see between -6 and -12 V
dc
on pins 3 and 4 (Ref.
to ground) of J1, the black 9-pin connector, when the RTU is
connected to the PC and both the PC and RTU have power. If
you do not see these voltages, check the connections; most
often they are reversed.
There should be a common ground reference for the RTU and
the PC or terminal.
Press the space bar three times to access the menu.
Problem:
Unit will not key the radio.
Recommendations:
Check jumpers JP6 and JP7.
Make sure Channel Busy Detect is set correctly.