22.2 Installation Basics UR90 & UR91
During installation of infrared or radio receivers, you will need to be able to
see and/or hear your command station to be sure commands are being received
via the UR panel. In the installation procedures detailed below, you will deter-
mine the best location/s in which to install UR90s and UR91s on your layout
for optimal infrared or radio signal reception. You will need to make observa-
tions to determine when the system is receiving a signal and when it is not.
Your Digitrax equipment gives you several ways you can make the observa-
tions. You should choose the observation method that works best with your lay-
out. For example: on a small layout, you may be able to observe the command
station directly. But on a large layout, it may be more convenient to set the
command station to generate diagnostic clicks so you can hear when the system
receives a command (see step 4 below for details).
1. With address 00 selected on the throttle and speed set to 99%, the
TRACK STATUS indictor on your DB150 will change from red to
green (or green to red) when you reverse the direction of address 00.
Do this test without an analog loco on the track and you will still see
the indicator color change. By removing the loco from the test envi-
ronment, you can eliminate one more variable that might cause prob-
lems. If you can’t see your command station everywhere on your
layout, see step 3 below for a way to observe this effect.
2. Use your LT1 as a local track testing tool. See the diagram below. a.
Twist together the black and blue leads.
b. Twist together the yellow and white leads.
c. Connect the black/blue leads to one rail and the yellow/white
leads to the other rail of any section of track.
d. The two outside LEDs on the LT1 will be lit.
e. Use your throttle to change the direction of address 00 that is set
to 99% speed, one of the LEDs on the LT1 will be
brighter than the other.
f. Change direction again, the other LED will be brighter.
This allows you to observe that the command station is receiving the
tetherless throttle’s command.
This tool can be carried with you as you move around the layout and
will give a local indication that the radio or infrared signal is being
received by the system without having to look at the command sta-
tion for confirmation.
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