CHECKOUT AND TEST
After coding the D-4B transmitter and receiver,
the units should be tested as a system.
NOTE:
The receiver should be powered as
described in the Code Setting and
Installation Instructions pamphlet
enclosed with the receiver. Provision
should be made (with a meter or sounder)
to detect that the correct receiver output
is activated when a signal is received
from the D-4B transmitter.
To test the transmitter, perform the following
steps:
STEP 1: Move the transmitter at least six feet
away from the receiver and press a pushbutton.
Receiver activation indicates that the transmitter
is operating properly and that the
transmitter/receiver’s digital codes are correctly
matched.
NOTE:
The transmitter transmits continously
with any button depressed. The red LED
lights during transmission to indicate
batery condition.
STEP 2: Operate the transmitter from various
locations. This will help to locate possible null
areas where structural steel, and/or certain
obstacles may interfere with transmission.
Ifthe transmitterfailstoactivatethereceiver, first
check the coding switches to see that the switch
keys in the transmitter and receiver are properly
matched. Next, check the battery and replace it
if it is week. Although the battery should last for
a year with normal use, it is good practice to
install a new battery every six months.
LINEAR LIMITED WARRANTY
This Linear product is warranted against defects
in material and workmanship for twelve (12)
months. The Warranty Expiration Date islabeled
on the product. This warranty extends only to
wholesale customers who buy direct from
Linear or through Linear’s normal distribution
channels. Linear does not warrant this
product to consumers. Consumers should
inquire from their selling dealer as to the nature
of the dealer’s warranty, if any. There are no
obligations or liabilities on the part of Linear
corporation for consequential damages
arising out of or in connection with use or
performance of this product or other indirect
damages with respect to loss of property,
revenue, or profit, or cost of removal,
installation, or reinstallation. All implied
warranties, including implied warranties for
merchantability and implied warranties for
fitness, are valid only until Warranty Expiration
Date as labeled on the product. This Linear
Corporation Warranty is in lieu of all other
warranties express or implied.
For warranty service on Linear equipment return
product, at sender’s expense to:
Linear Corporation
5957 Landau Court
Carlsbad, CA 92008
Attention: Repairs Department
IMPORTANT !!!
Linear radio controls provide a reliable
communications linkand fillan importantneedin
portable wireless signalling. However, there are
some limitations which must be observed.
✶For U.S. installations only: The radios are
required to comply with FCC Rules and
Regulations as Part 15 devices. As such,
they have limited transmitter power and
therefore limited range.
✶Receivers may be blocked by radio signals
that occur on or near their operating
frequencies, regardless of code settings.
✶Areceivercannotrespondtomorethanone
transmitted signal at a time.
✶Infrequently used radio links should be
tested regularly to protect against
undetected interference or fault.
✶A general knowledge of radio and its
vagariesshould begainedprior toacting as
a wholesale distributor or dealer, and these
facts should be communicated to the
ultimate users.
Copyright © 1989 Linear Corporation 203983 A
D-4B
FOUR-CHANNEL
DIGITAL TRANSMITTER
Code Setting
Instructions
2055 Corte Del Nogal
Carlsbad, CA 92009
(619) 438-7000 •(800) 421-1587
CA (800) 321-1845 •FAX (619) 438-7043
Customer/Technical Service: (800) 392-0123
A NORTEK COMPANY
