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Antenna Combiner
IMPORTANT SAFETY INSTRUCTIONS
1.
READ these instructions.
2.
KEEP these instructions.
3.
HEED all warnings.
4.
FOLLOW all instructions.
5.
DO NOT use this apparatus near water.
6.
CLEAN ONLY with dry cloth.
7.
DO NOT block any ventilation openings. Allow sufficient distances for adequate ventila-
tion and install in accordance with the manufacturer's instructions.
8.
DO NOT install near any heat sources such as open flames, radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat. Do not place any open
flame sources on the product.
9.
DO NOT defeat the safety purpose of the polarized or grounding type plug. A polarized
plug has two blades with one wider than the other. A grounding type plug has two blades
and a third grounding prong. The wider blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replace-
ment of the obsolete outlet.
10. PROTECT the power cord from being walked on or pinched, particularly at plugs, conve-
nience receptacles, and the point where they exit from the apparatus.
11. ONLY USE attachments/accessories specified by the manufacturer.
12. USE only with a cart, stand, tripod, bracket, or table specified by the manu-
facturer, or sold with the apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid injury from tip-over.
13. UNPLUG this apparatus during lightning storms or when unused for long
periods of time.
WARNING: This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm.
General Description
Shure antenna combiners actively combine RF outputs from multiple wireless IEM transmitters to a single antenna, improving RF performance and
conserving rack space.
Features
• Reduction of intermodulation artifacts for cleaner RF environment
• Wideband operation (470-865 MHz or 865-960 MHz)
• Daisy-chain up to 2 combiners with the expansion port.
• Provide DC power to compatible IEM transmitters.
• LED indications of signal presence, signal overload and current draw
Model Variations
Shure antenna combiners for Shure IEM wireless personal monitoring
systems are available in four-channel and eight-channel rackmountable
configurations.
Model
Frequency Range
PA421B
470-865 MHz
PA421BX
865-960 MHz
PA821B
470-865 MHz
PA821BX
865-960 MHz
The antenna combiners are available in two frequency ranges. The RF
inputs allow up to four or eight (model dependent) IEM systems to share
a single antenna. The DC power outlets and supplied power cables
allow you to distribute power to up to four compatible IEM systems
without requiring external power supplies.
RF Inputs
DC Power Outlets
4
4
4
4
8
0
8
0
14. REFER all servicing to qualified service personnel. Servicing is required when the ap-
paratus has been damaged in any way, such as power supply cord or plug is damaged,
liquid has been spilled or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has been dropped.
15. DO NOT expose the apparatus to dripping and splashing. DO NOT put objects filled with
liquids, such as vases, on the apparatus.
16. The MAINS plug or an appliance coupler shall remain readily operable.
17. The airborne noise of the Apparatus does not exceed 70dB (A).
18. Apparatus with CLASS I construction shall be connected to a MAINS socket outlet with a
protective earthing connection.
19. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or
moisture.
20. Do not attempt to modify this product. Doing so could result in personal injury and/or
product failure.
21. Operate this product within its specified operating temperature range.
This symbol indicates that dangerous voltage constituting a risk of
electric shock is present within this unit.
This symbol indicates that there are important operating and mainte-
nance instructions in the literature accompanying this unit.
Included Components
PA421B
PSM Antenna Combiner
470-865 MHz
DC OUTPUT
MAIN OUT - 50 OHMS
2 ft. DC Power Output Cables*
IEC Power Cable
*(4) 2 ft. DC power output cables are included with four-channel
combiners only.
**The four-channel combiners come with (4) 22 in. BNC cables. The
eight-channel combiners come with (8) 22 in. BNC cables.
3
A IN
B IN
A+B OUT
POWER
EXPANSION PORT
Antenna Combiner
11 in. BNC Jumper Cables
22 in. BNC Cables**
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