ZETRON 025-9581M, Installation And Maintenance Manual

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Using a Model 26 Fire Station Dispatcher for System Backup
134 025-9581M
10. Enter a “ 3 ” to select {3} PA Un-Muted Mode . If this option is not already set to
Enabled , enable it now. Enter an “ e ” to return to the PA Options menu, and then a
second “ e ” to return to the main menu.
11. Verify that the 5 Minute Failsafe Timeout is Disabled .
12. At the Main menu, enter an “ e ” to exit the serial programming mode.
13. Move switch SW1-8 back to the Off position and disconnect the serial cable from
the socket J1 on the transponder board.
Possible Level Setting Changes
While the radio link used for carrying the voice audio was originally set up to provide an
adequate level of voice audio for sending announcements to the station PA system, in this
new arrangement it also needs to provide a reliable path for FFSK packets traveling back
and forth between the Model 26 and the individual Model 6203 station units. It is assumed
that the Model 26 has been programmed to support the station units in this system and
properly interfaced to a suitable radio. It can either be the one used to transmit voice audio
from the communications center when the FSA Sever is in control, or a similar unit.
It is recommended that you read through this section at least once prior to actually trying
to make adjustments. The procedures are not that difficult; however, the whole process
will go more smoothly if you know what to expect and have arranged to have everything
you need on hand before you start.
Equipment & Prerequisites
• A small, flat-bladed screwdriver suitable for adjusting the potentiometers on the
transponder board of the Station Transponder Unit
• An oscilloscope, actually you may want two of them, one at the Model 26 location
and one at the Model 6203 location
• For setting levels in a radio-based system, a service monitor is required to check
channel deviation levels
• Again, you will want two of these, a laptop computer or PC with an available serial
port and running serial terminal software to be used for controlling either the Model
26 or any of the Model 6203/Model 6204 units, the settings should be: 9600 baud,
8-bit words, 1 stop-bit, no parity checking, and flow control set to none
• Serial cables (Zetron P/N 709-7208) for connecting between PC or laptop and
Model 26 and Model 620x
• A land line, cell phone, or radio link so instructions can be passed between the
dispatch center equipment room and the station at which the Model 6203 is located
Note While the Model 6203 (or Model 6204) will provide clear audio at its
location, it was never intended to provide a high level audio output.
It is assumed that the signal from the station unit will be sent to a
PA amplifier and that the PA amplifier will drive the speakers in the
fire station.