
 
Installation: 
 
The ASR 100 Receiver Antenna Splitter allows your existing    
VHF antenna to be used by both a VHF radiotelephone and 
an AIS Receiver.  
  
The unit is not waterproof and should be mounted in a dry 
location. The unit can be fixed by the 4 mounting holes in the 
end flanges. 
 
It will require connection to the boats DC supply of 12-24 
Volts. It is recommended to connect it to the same circuit as 
your existing VHF Radio. 
 
RED      Positive + 
BLACK    Negative – 
 
Remove the existing antenna connection from your VHF Radio 
and plug this connection into the Antenna connection on the 
ASR 100.  Take the 1m VHF cable from the ASR 100 and plug 
this back into your VHF radio. The AIS cable fitted with a BNC 
connector can now be plugged into your AIS Receiver.  
 
Operation: 
 
On applying power to the ASR 100 reception is now possible 
on both your VHF Radio and your AIS Receiver. 
  
When the transmitter is operated on the VHF Radio the AIS 
reception will stop. Reception on the AIS receiver will start 
immediately you stop transmitting. 
 
In the event of a fault or power failure to the ASR 100 the 
VHF Radio transmit and receive will continue as normal. 
 
 
Limited Warranty: 
 
Comar Systems Ltd warrants this product to be free from 
defects in materials and manufacture for one year from the date 
of purchase. Comar Systems Ltd will, at its sole option, repair or 
replace any components that fail in normal use. Such repairs or 
replacement will be made at no charge to the customer for parts 
and labour. The customer is, however, responsible for any 
transportation costs incurred in returning the unit to Comar 
Systems Ltd.  
 
This warranty does not cover failures due to abuse, misuse, 
accident or unauthorized alteration or repairs. 
 
The above does not affect the statutory rights of the consumer. 
 
Note: Every effort has been made to ensure that all information 
contained in this manual is accurate at the time of going to 
press.  However AIS is a new technology and the legislation is 
subject to change.  We therefore cannot take any responsibility 
for the content of this manual and advise that you take normal 
steps to ensure that the information is at its most current when 
you are reading this manual.   
 
 Product Support 
 
Comar Systems Limited 
Unit 7, Medina Court 
Arctic Road 
Cowes 
Isle of Wight, PO31 7XD 
United Kingdom 
Telephone: +44 (0) 1983 282400  Fax: +44 (0)1983 280402  
E-mail: techsupport@comarsystems.com 
Internet: www.comarsystems.com
 
 
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