User's Manual

Troubleshooting
RFI-148 & RFI-900 High Output Power Paging Transmitters User Manual Page 128 of 134
Appendix G. Troubleshooting
This section outlines steps that can be taken in response to issues with the paging transmitter.
G.1 Configuring Sensor Cutoffs
Changing the paging transmitter transmit power should also include changing the sensor cutoffs. The factory
default settings for the paging transmitter is for 20 W transmit power, including reasonable sensor cutoffs for
this transmit power. If the transmit power is increased, then the sensor cutoffs also need to be similarly
increased. Please contact STI Engineering for accessing Cruise Control configuration files with recommended
sensor cutoffs for common transmit power settings.
If the LIU interface supply voltages are being used to supply external peripherals then the corresponding upper
current cutoff will need to be increased by the current draw of the peripheral.
G.2 Fault LED Active
The paging transmitter has several different indicators that a fault is currently active. The easiest method to
determine fault status is to observe the front panel of the unit. If the red fault LED is on then the transmitter
has an active fault. The fault status can also be interrogated using Cruise Control.
To determine the type of fault that is active, connect to the paging transmitter using Cruise Control (for
information on using Cruise Control see section 3.2). The front serial port of the paging transmitter has a
configuration locked to 19200 8N1 (19200 baud, 8 data bits, even parity, and 1 stop bit). Once connected with
Cruise Control, navigate to the Faults group and Cruise Control will display a view similar to the one shown
in Figure 20 below.