To avoid damaging internal components, the UA845 amplifier should be the last component in your system to be powered on.

To avoid damaging internal components, the UA845 amplifier should be the first component in your system to be powered off.

Pour ??viter d'endommager les composants internes, l'amplifica- teur UA845 doit ??tre le dernier composant du syst??me ?? ??tre mis sous tension.

Pour ??viter d'endommager les composants internes, l'amplifica- teur UA845 doit ??tre le premier composant du syst??me ?? ??tre mis hors tension.

Para evitar da??ar los componentes internos, el amplificador UA845 debe ser el ??ltimo componente que se enciende en su sistema.

Para evitar da??ar los componentes internos, el amplificador UA845 debe ser el primer componente que se apaga en su sistema.

Der Verst??rker UA845 sollte als letzte Komponente Ihres Sys- tem angeschaltet werden, um die Besch??digung interner Kompo- nenten zu vermeiden.

Der Verst??rker UA845 sollte als erste Komponente Ihres Sys- tem ausgeschaltet werden, um die Besch??digung interner Kom- ponenten zu vermeiden.

Per prevenire danni ai componenti interni, l'amplificatore UA845 va acceso per ultimo.

Per prevenire danni ai componenti interni, l'amplificatore UA845 va spento per primo.

Ce symbole indique la pr??sence d'une tension dangereuse dans l'appareil constituant un risque de choc ??lectrique.

Ce symbole indique que la documentation fournie avec l'appareil contient des instructions d'utilisation et d'entretien importantes.

Dieses Symbol zeigt an, dass gef??hrliche Spannungswerte, die ein Stromschlagrisiko darstellen, innerhalb dieses Ger??ts auftreten

Dieses Symbol zeigt an, dass das diesem Ger??t beiliegende Handbuch wichtige Betriebs- und Wartungsanweisungen enth??lt.

Este s??mbolo indica que la unidad contiene niveles de voltaje peligrosos que representan un riesgo de choques el??ctricos.

Este s??mbolo indica que la literatura que acompa??a a esta unidad contiene instrucciones importantes de funcionamiento y mantenimiento.

Questo simbolo indica la presenza di alta tensione all'interno dell'apparecchio, che comporta il rischio di folgorazione.

Questo simbolo indica la presenza di istruzioni importanti per l'uso e la manutenzione nella documentazione in dotazione all'apparecchio.

The Shure Model UA845 is an amplified, UHF Antenna Distribu- tion System that expands a wireless microphone system by splitting one pair of antennas to multiple Shure U4 or Shure UC4 wireless receivers. It also amplifies RF signals to compensate for insertion loss due to splitting signal power to mulitple output connectors. Each UA845 allows up to four receivers to use the same antennas. CASCADE connectors allows connections to a fifth receiver or a second UA845. There are also power connectors for powering Shure UHF and UC Wireless systems.

Each system contains the following items:

???UA845 Antenna Distribution System

???Rack-mounting hardware

???Surface-mounting hardware

???Front-mounting antenna hardware

???18-in. Power OUTPUT Cord

???Power Cord

???Antenna cables for receiver connections

???DC power cables for receiver connections to DC power con- nectors on UC receivers.

The Shure Model UA845 ensures maximum sensitivity and sig- nal processing capability, providing the widest radio range possible for the largest number of wireless receivers. To get the most from this system, follow these guidelines:

???When using long runs of cable for remote-mounted antennas, use the UA830 In-Line RF Amplifier and the Shure Model UA825 or UA850 Remote Antenna Extension cables (RG-8/X or equivalent), which have low loss at UHF operating frequen- cies

???Locate multiple transmitters more than 3 m [10 ft] from receiv- ing antennas

???Expandability. The UA845 UHF Antenna Distribution System is designed for large UHF wireless systems. Each unit allows up to four wireless receivers to use the same two antennas, and the CASCADE ports allow connection to a fifth receiver or a second UA845.

???Compatibility. The UA845 is compatible with all Shure wire- less microphone receivers operating within a compatible fre- quency range (see UHF Carrier Frequency Ranges in the Specifications section).

???CASCADE Ports. Two 50 ??, BNC-type antenna CASCADE ports allow an additonal UA845 unit or a fifth wireless receiver. A large wireless system can be run off of a single pair of anten- nas.

???Power OUTPUT and OUT Connectors. Up to five (5) U4 re- ceivers can be daisy-chained and powered from a single source via the Power OUTPUT connectors. Up to four (4) UC4 receivers can be powered from the UA845 using the 12 Vdc OUT connectors.

???Low Noise and Intermodulation Distortion. The UA845 maintains clean signals with minimal distortion.

???Insertion Loss Compensation. Whenever a signal is split to multiple output ports, there is a loss in signal strength. The UA845 amplifies signals to compensate, ensuring a strong sig- nal to the receivers.

???Front-Mounted Antennas. The UA845 comes with hardware to front-mount the antennas, if desired.+

BACK PANEL

FIGURE 2

1AC Power INPUT Connector.

2AC Power OUTPUT Connector. Each UA845 has a Power OUTPUT connector for daisy-chaining up to five

(5) Shure Model U4 UHF Diversity Single or Dual Receiv- ers to a single power source.

NOTE: This connector does not work for Shure UC4 Receivers.

3ANTENNA IN Ports, Channel A & B. BNC-type connec- tors for antennas.

4RF CASCADE Connectors (Output connector 5), Channel A & B. BNC-type connectors for adding a fifth receiver, or additional UA845's, permitting more wireless receivers to be connected.

5RF OUTPUT Connectors, Channel A & B. BNC-type connectors for up to four wireless receivers.

612 Vdc OUT Connectors. These power connectors are designed to power up to four (4) Shure UC4 Wireless systems.

Installing Front-Mounted Antennas

The UA845 comes equipped for front-mounted antennas. Front-mounting improves RF performance of the system by moving the antennas to the front of the rack. When a unit is located in a rack, antennas should be either front- or remote-mounted.

1.Insert the bulkhead adapters through the holes in each bracket, and secure them from each side, using the supplied hardware.

INSERTING BULKHEAD ADAPTERS

FIGURE 3

2.Connect the supplied antenna cables to the receiver antenna inputs and adapters.

CONNECT ANTENNA CABLES

FIGURE 4

3.Install the antennas onto the bulkhead adapters protruding through the front panel. See 5.

power

UA845

UHF Antenna Distribution System

ATTACH ANTENNAS TO THE ADAPTERS

FIGURE 5

NOTE: For the best results, point the antennas up and away from each other at 45?? angles from vertical. This ensures the best possible reception and greatly reduces the possibility of signal dropout. Always perform a walk-through test of the system in the performing area before using a wireless system.

Mounting the UA845 in an Equipment Rack

NOTE: If front mounting the antennas, connect them before mounting the UA845 in the rack. Once in the rack, it is more difficult to insert the bulkhead adapters and connect the antenna cables.

1.Insert the unit into a 19-inch equipment rack.

2.Using the screws supplied, secure the unit to the rack.

UA845

UHF Antenna Distribution System

RACK MOUNTING

FIGURE 6

3.If the antennas are remote mounted from the back of the rack, insert the supplied plastic plugs into the holes on the front of the brackets.

Installing Remote Antennas

Remote-mounted antennas have the advantage of being free from the unit and closer to the transmitters. They can be placed any- where within the recommended cable length, creating a much wider radio reception range and further reducing the possibility of signal dropout. When remote-mounted antennas are desirable, please ask your Shure dealer for information on the UA830 In-Line RF Am- plifier. Cables are available in UA825 (7.5 m [25 ft]) and UA850 (15 m [50 ft]) versions.

UA845

power

UA845

UHF Antenna Distribution System

power

UA845

UHF Antenna Distribution System

power

UA845

UHF Antenna Distribution System

RECEIVERS

REMOTE-MOUNTED ANTENNAS

FIGURE 7

Single UA845 Setup

1.Using low-loss, 50 ?? coaxial cables (RG-58 or equivalent), con- nect the right and left (Channels 1 through 4, A and B) RF OUTPUT ports on the UA845 to the corresponding left and right antenna inputs on each receiver. Use the CASCADE ports to connect a fifth receiver.

2.Using the supplied power cable, connect the UA845 to a power outlet.

3.To daisy-chain U4 Receivers together with Power OUTPUT cables, connect the Power OUTPUT connector of the UA845 to the Power INPUT connector of one receiver. Connect the remaining receivers similarly. Connect the POWER INPUT of the unit to a power supply.

NOTE: No more than five (5) Shure UHF receivers should be powered through a daisy-chain from a single UA845.

4.To power Shure UC4 receivers, connect the power input ports of the UC4 receivers to the 12 Vdc OUT of the UA845. Up to four UC4 Receivers can be powered.

Multiple UA845 Setup

1.Connect the CASCADE ports (connector 5) for RF OUTPUT Channels A and B of one UA845 to the ANTENNA INPUT, channels A and B, of a U4 receiver, a UC4 receiver, or a sec- ond UA845.

2.If desired, connect additional units in the same manner.

3.To daisy-chain U4 Receivers together with Power OUTPUT cables, connect the Power OUTPUT connector of the UA845 to the Power INPUT connector of one receiver. Connect the

remaining receivers similarly. Connect the POWER INPUT of the unit to an AC power supply.

WARNING: When adding additional UA845's to a system, each UA845 should be connected to a separate power supply. No more than five (5) receivers can be powered from a single UA845. Daisy-chaining multiple UA845's through the Power OUTPUT ports will overload a single power supply, possibly causing damage to the equipment.

4.To power Shure UC4 receivers, connect the power input ports of the UC4 receivers to the 12 Vdc OUT of the UA845. Up to four UC4 Receivers can be powered.

Distributed Output Level (Gain)

Models UA845-UA, UB, MA, MB, KK, MC:

3.5 dB typical, 2.0 dB to 5.0 dB from antenna input (Output ports 1???4).

0.5 dB typical, ???1.0 dB to 2.0 dB from antenna input (Cascade port)

ModelsUA845 US, UK and E:

3 dB typical, 0 dB to 3.5 dB from antenna input (Output ports 1???4)

1 dB typical, ???1.6 dB to +1.8 dB from antenna input (Cascade port)

Output Connector Isolation

Greater than 25 dB

Third Order Intercept Point (3 OIP)

Typical 24 dBm

Input/Output AC Line Voltage

100 to 240 Vac, 50/60 Hz, unswitched

DC Output Voltage

12 Vdc, 4 connectors

Maximun Current Supply from DC Outputs

1.1 Amps

Impedance

50 ??

Operating Temperature Range

???7?? C (+20?? F) to 49?? C (+120?? F)

Overall Dimensions

44.5 mm high x 482.6 mm wide x 295.3 mm deep (1 3/4 x 19 5/8 x 11inches)

Net Weight

3.32 Kg (7 lbs, 5 oz)

Input/Output Antenna Connector Type

BNC-type

AC Power Consumption

15 W per unit typical. When used with 4 UC4's, 55 W max.

Certification

UA845: LISTED by UL and CUL (U.S. and Canada), IC and FCC; IC Certified (Canada). Meets applicable European direc- tives for CE marking eligibility. VDE GS-Certified. Meets Re- quirements of EMC Standard and 301 489 Parts 1 and 9. Meets the essential requirements of the European R&TTE Directive 99/5/EC and are eligible to carry the CE marking.

Furnished Accessories

Optional Accessories

Replacement Parts

Warranty. Shure Incorporated (???Shure???) hereby warrants that these products will be free from defects in material and workman- ship for a period of two years from the date of purchase. At its op- tion, Shure will repair or replace the defective product and promptly return it to you, or refund the purchase price. Retain proof of pur- chase to validate the purchase date and return it with any warranty claim. If you believe this product is defective within the warranty pe- riod, carefully repack the unit, insure it, and return it postpaid to:

Shure Incorporated

Attention: Service Department

5800 W. Touhy Avenue

Niles, IL 60714-4608 U.S.A.

For service outside the United States, return the product to your authorized Shure Distribution Center.

All claims of defects or shortage should be directed to the above address. Please furnish model number, operating frequency, and date, place and proof of purchase (such as a copy of your sales re- ceipt) to establish warranty. Your letter should include all pertinent details including applicable model or part numbers and a brief de-

scription of the problem. Do not mail any units or parts to Shure un- less requested to do so by Shure's Service Department. Any returned items must have prior authorization. Unauthorized returns are delayed in handling; these delays can be avoided by contacting Shure in advance and furnishing the necessary information.

Shure reserves the right to make design changes and product improvements on any previously manufactured products. Shure also reserves the right to ship new and/or improved products which are similar to the form, fit and function of the originally ordered prod- ucts.

Licensing. Changes or modifications not expressly approved by Shure Incorporated could void your authority to operate the equip- ment. Licensing of Shure wireless microphone equipment is the us- er's responsibility, and licensability depends on the user's classification and application, and on the selected frequency. Shure strongly urges the user to contact the appropriate telecommunica- tions authority concerning proper licensing, and before choosing and ordering frequencies other than standard frequencies.