MIPRO ACT-71 User Manual

User Guide

2 CE 4 6 7 B

ACT-71 / ACT-72 / ACT-74

Wideband True Diversity Receiver

All rights reserved. Do not copy or forward without prior approvals MIPRO.
Specifications and design subject to change without notice. MN 014/07

IMPORTANT SAFETY INSTRUCTIONS

WARNING

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 a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the
manufacturer's instructions.

8. Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarised or ground plug: A
polarised plug has two blades with one wider than the other. The wide blade
is provided for your safety. When the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plug,
convenience 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 manufacturer, 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.

14. Refer all servicing to qualified service personnel. Servicing is required
when the apparatus 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. To reduce the risk of fire or electric shock, do not expose this apparatus to
rain or moisture.

16. Apparatus should not be exposed to dripping or splashing and no objects
filled with liquids, should be placed on the apparatus.

17. Use only with the battery which specified by manufacturer.

18. The power supply cord set is to be the mains disconnected device.

1. FOR OUTDOOR USE:
To reduce the risk of fire or electric shock, do not expose this apparatus to
rain or moisture.

2. UNDER WET LOCATION:
Apparatus should not be exposed to dripping or splashing and no objects
filled with liquids, such as vases should be placed on the apparatus.

3. SERVICE INSTRUCTIONS:
CAUTION - These servicing instructions are for use by qualified service
personnel only. To reduce the risk of electric shock, do not perform any
servicing other than that contained in the operating instructions unless you
are qualified to do so.

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
maintenance instructions in the literature accompanying this unit.

& IC - ID

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES AND RSS-123 ISSUE2 OF
CANADA. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:

(1) This device may not cause interference.

(2) This device must accept any interference, including interference that may cause
undesired operation of the device. This equipment complies with FCC RF radiation
exposure limits set forth for an uncontrolled environment.

Disposal

200 5-0 8-1 3

Dispose of any unusable devices or batteries responsibly and in accordance
with any applicable regulations.

Disposing of used batteries with domestic waste is to be avoided!

Batteries / NiCad cells often contain heavy metals such as cadmium(Cd),
mercury(Hg) and lead(Pb) that makes them unsuitable for disposal with
domestic waste. You may return spent batteries/ accumulators free of
charge to recycling centres or anywhere else batteries/accumulators are
sold.

By doing so, you contribute to the conservation of our environment!

Contents

True Diversity Receivers

TRUE DIVERSITY RECEIVERS

1

2 MIPRO'S Proprietary “ACT" Function & Operation

3

6

8

9

11

22

23

24 Troubleshooting

Product Overview

Part Names and Functions

Receiver Installation

Receiver Operation Tips

Rackmount Installation for Receivers

Receiver VFD Interface

Computer Network Interface Operation

General Tips for Improving System Performance

PRODUCT OVERVIEW

The ACT-71/ACT-72/ACT-74 receivers feature a full-color Vacuum Fluorescent Display
(VFD) which delivers a very bright light with exceptionally clear contrast. The VFD has a
wide viewing angle and can be viewed clearly in both indoor and outdoor environments.
Since it displays all pertinent parameters on the same screen, audio professionals can
clearly monitor group, channel, frequency, name, RF & audio signal strength, diversity
condition, transmitter battery level, squelch level and indication of interference at a glance.

True diversity technology ensures exceptionally long range for greatest RF reliability
and freedom of movement, while the industry's first AutoScan & Automatic Channel
Targeting (ACT) channel set-up technology and dual-squelch "PiloTone & NoiseLock" circuits
minimize interference.

ACCESSORIES

The following accessories are included:

AC Power Cord x 1Antenna × 2 User Guide × 1

Phone Cable × 1

0

1

Audio Output Cable × 1

(ACT-71)

Rack-mount kit × 1 set

(ACT-71 )1 half-rack

True Diversity ReceiversTrue Diversity Receivers

CHANNEL

1

ACT SET

BA

BA

L

SQ

GRP

CH

NAME

ADD

FRQ

SET

MIPRO'S PROPRIETARY "ACT" FUNCTION & OPERATION

What is ACT?

! “ACT” stands for “Automatic Channel Targeting”. MIPRO was the first manufacturer in

the industry to use infrared (IR) technology to automatically synchronize the frequency
selected on the receiver to any ACT handheld or bodypack transmitter on the same
frequency band.

ACT Features

No manual frequency adjusting needed, unlike traditional transmitters.

!

Simple, fast and precise frequency set-up without mechanical errors.

!

!

Once the frequency has been set, the data is stored in memory, meaning that the
frequency is set until it is changed by performing the “ACT” function again, even after
powering off.

ACT Set-Up

Ensure a receiver channel is set up.

!

Press and release the “ACT” button to activate the ACT function. Once activated, the

!

word “ACT” appears.
Turn the transmitter’s power on and locate the transmitter infrared (IR) port and bring

!

it within 30cm (12”) of the receiver's ACT port. The receiver's IR port is a round
“window” located between the ACT & SET buttons. The transmitter IR port is normally
indicated by a round red colored spot.

When the frequencies are synchronized successfully between the transmitter and

!

receiver, the word “ACT” disappears and the original group and channel reappears.

PART NAMES AND FUNCTIONS

Front Panel:

ACT-71 Single-Channel True-Diversity Receiver

ON

BA

BA

GRPCHNAME

CHANNEL1ACT SET

POWER

1

ACT-72 Dual-Channel True-Diversity Receiver

ON

POWER

1

2

ACT-74 Four-Channel True-Diversity Receiver

ON

BA

CHANNEL1ACT SET

POWER

1

2

BA

GRPCHNAME

L

SET

SQ

FRQ

ADD

2

SET

BA

BA

FRQ

GRPCHNAME

CHANNEL2ACT SET

L

SQ

ADD

L

SET

SQ

FRQ

ADD

3 4

BA

BA

GRPCHNAME

CHANNEL1ACT SET

BA

BA

GRPCHNAME

CHANNEL3ACT SET

3

SET

SELECT

5

L

SET

SQ

FRQ

ADD

SET

BA

BA

FRQ

GRPCHNAME

CHANNEL2ACT SET

ADD

3

L

SET

SQ

FRQ

ADD

SET

BA

BA

FRQ

GRPCHNAME

CHANNEL4ACT SET

ADD

SET

SQ

SELECT

5

4

SET

SQ

SELECT

5

4

ON

POWER

BA

BA

CHANNEL1ACT SET

GRPCHNAME

1

Antenna “A” Front Mount: Allows an optional FBC-71 rear-to-front antenna cable
for front antenna placement.

2

SET

L

SET

SQ

FRQ

ADD

ACT-71 7

SELECT

Power Switch and Indicator: When the switch is turned on, the red indicator
illuminates to denote normal power status.

3

Receiver Display: Color VFDs.

4

Rotary Controller: To set up parameters. Move cursors by turning the control
clockwise or counterclockwise.

5

Antenna “B” Front Mount: Allows an optional FBC-71 rear-to-front antenna cable
for front antenna placement.

<

3

0

cm (

1

2

in

.)

or

2

3

Rear Panel:

ACT-71 Single-Channel True-Diversity Receiver

10

6

ACT-72 Dual-Channel True-Diversity Receiver

ANTENNA B
+8V DC BIAS

0dB

-6dB

+16dB

LIFT

GND

LEVEL

8 11

BALANCED OUT

16

1: GND

21

+

2: HOT

3

-

3: COLD

CH 1CH 2MIXED

True Diversity ReceiversTrue Diversity Receivers

11

Unbalanced Audio Output Jack: ¼” PHONE PLUG type connector provides

unbalanced audio output signal from this jack to the mixer (ACT-71 only).
Output level is selectable from among 3 levels: “-6dB”, “0dB” and +10dB (the switch
will show +16dB on the receiver, but actually puts out +10dB on the unbalanced
jack).

12

Network Interface Connector: For linking the receivers to a computer system-

monitoring program.

13

12

14 13

REMOTE

OUT

This connector can not be connected
to telecommunication networks.

ANTENNA A

+8V DC BIAS

IN

15

AC INPUT: 100~240V

Rear Antenna “A” Input Connector: The A antenna can be installed directly to this
antenna connector which also provides power to an optional antenna booster.

14

AC Power Socket: The input socket for AC power ranging from 100VAC ~ 240VAC.

15

Rack-Mount Brackets: To install the receiver into a standard EIA 19-inch rack case.

16

LIFT/GND Switch: Lifts ground from Pin 1 of the XLR connector. (GND = default).

7

6

9

16

8

10

12

13 14

ACT-74 Four-Channel True-Diversity Receiver

ANTENNA B
+8V DC BIAS

6

7

6

Rear Antenna “B” Input Connector: The “B” antenna can be installed directly to

0dB

-6dB

+16dB

LIFT

GND

LEVEL

8 9

16

BALANCED OUT

10

1: GND

21

+

2: HOT

3

-

CH 1CH 2CH 3CH 4MIXED

3: COLD

REMOTE

OUT

This connector can not be connected
to telecommunication networks.

12

ANTENNA A

+8V DC BIAS

IN

13 14

AC INPUT: 100~240V

this antenna connector which also provides power to an optional antenna booster.

7

Ventilation Fan: Ensures stable performance in long hours of operation under high

temperature environments.

8

Level Switch: "0dB" selection is for "Microphone level" output. "+16dB" selection is

for “LINE level” output. “-6dB” selection is for half of cable microphone volume.

9

Mixed AF Output Jack: A balanced output jack for mixed AF signals from all

installed channels; 3 output levels to choose from.

10

Balanced Audio Output Jack: XLR type connector provides balanced audio

output signal from this jack to the mixer, and output level is selectable from among 3
levels: “-6dB”, “0dB” and “+16dB”.

4

5