Sennheiser ASA 1 User Manual
Antenna Splitter
ASA 1
Instruction manual
Contents
Thank you for choosing Sennheiser!
We have designed this product to give you reliable operation
over many years. Over 60 years of accumulated expertise in
the design and manufacture of high-quality electro-acoustic
equipment have made Sennheiser a world-leading company in
this field.
Please take a few moments to read these instructions carefully,
as we want you to enjoy your new Sennheiser products quickly
and to the fullest.
Important safety instructions ........................................................ 2
The ASA 1 active antenna splitter ................................................ 4
Delivery includes ............................................................................... 4
Operating elements ......................................................................... 5
Putting the ASA 1 into operation .................................................. 7
Preparing the ASA 1 for use ................................................................. 7
Connecting devices to the ASA 1 and
switching the ASA 1 on ....................................................................... 12
Making an 8-channel system using the ASA 1 ............................... 14
Cleaning the ASA 1 ......................................................................... 16
If a problem occurs ... ..................................................................... 16
Accessories and spare parts ......................................................... 17
Specifications .................................................................................. 18
Manufacturer Declarations ........................................................... 19
1
Important safety instructions
Important safety instructions
• Read this instruction manual.
• Keep this instruction manual. Always include this instruction
manual when passing the device on to third parties.
• Heed all warnings and follow all instructions.
• Clean only with a slightly damp cloth.
• Refer all servicing to qualified service personnel.
Servicing is required if the device has been damaged in any
way, liquid has been spilled, objects have fallen inside, the
device has been exposed to rain or moisture, does not operate
properly or has been dropped.
• WARNING: To reduce the risk of fire or electric shock, do not
use the device near water and do not expose it to rain or
moisture. Do not place objects filled with liquids, such as
vases or coffee cups, on the device.
• Only use the NT 1-1 mains unit.
• Do not block any ventilation openings. Install the device in
accordance with the instructions given in this manual.
• Do not install the device near any heat sources.
• Only use attachments/accessories specified by Sennheiser.
Replacement parts
When replacement parts are required, be sure the service
technician uses replacement parts specified by Sennheiser or
those having the same characteristics as the original part.
Unauthorized substitutions may result in fire, electric shock, or
other hazards.
Safety check
Upon completion of any service or repairs to this device, ask the
service technician to perform safety checks to determine that
the device is in a safe operating condition.
2
Important safety instructions
Intended use of the device
Intended use of the ASA 1 includes:
• having read and understood this instruction manual
especially the chapter “Important safety instructions” on
page 2,
• using the device within the operating conditions and
limitations described in this instruction manual.
“Improper use” means using the ASA 1 other than as described
in this instruction manual, or under operating conditions which
differ from those described herein.
3
The ASA 1 active antenna splitter
The ASA 1 active antenna splitter
The ASA 1 active antenna splitter has been designed to enable
routing of UHF antenna signals to several receivers in a multichannel system. Up to four diversity receivers may be supplied
with signal by only two antennas. The integral RF amplifiers
ensure that the ASA 1 does not introduce any additional UHF
signal loss.
The ASA 1 incorporates DC distribution to enable simultaneous
powering of up to four receivers and two antenna boosters via
its BNC sockets. The antenna boosters may be required in order
to compensate for cable losses due to long antenna cables.
A single NT 1-1 mains unit (to be ordered separately) is
required to power the ASA 1, the connected receivers and
antenna boosters.
By linking two ASA 1, an 8-channel diversity system can be
operated with only two antennas.
Using the GA 3 rack adapter, two ASA 1 or one ASA 1 and one
stationary receiver (e.g. EM 100 G3, EM 300 G3 or EM 500 G3)
can be mounted into a 19” rack.
The ASA 1 is suitable for the following areas of application:
• Multi-channel RF installations
• Permanent installations in small conference centres and
similar venues
Delivery includes
1 ASA 1 antenna splitter
1 set of device feet
8BNC cables
1 instruction manual
You additionally require the NT 1-1 mains unit with a suitable
mains connector (see “Accessories and spare parts” on
page 17).
4
Operating elements
Operating elements
On/Off button
Operation indicator
Cable grip for cable of mains unit
DC IN socket
for connection of NT 1-1 mains unit
BNC socket RF OUT A
RF output only for connection of an additional ASA 1
(to create a 1-to-8 diversity splitter)
Four BNC sockets A1 to A4
RF outputs of diversity section A for connection of
the receivers
Each of these RF outputs can power one receiver.
BNC socket ANT RF IN A
antenna input of diversity section A
BNC socket ANT RF IN B
antenna input of diversity section B
Four BNC sockets B1 to B4
RF outputs of diversity section B for connection of
the receivers
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5
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