Audio Envoy User manual

Envoy
User Guide
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Audio Radio Microphone Systems are noted for their
ease of use. If however you need advice or technical
support at any time please contact Audio Ltd.
All products come with free lifetime technical support,
and we are also always pleased to help users of our
equipment, whatever the application.
Audio Ltd,
Audio House
Progress Road
High Wycombe
Bucks, HP12 4JD
U.K.
Tel: [phone]
Fax: [phone]
email: [email protected]
World Wide Web: http://www.audioltd.com
Copyright © 2001 Audio Limited
Part no: ENVOY/1
This guide was produced by
Human Computer Interface Limited,
http://www.interface.co.uk
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Contents
Introduction 5
Audio Limited ........................................................................ 5
The Envoy Range .................................................................. 5
Diversity reception ............................................................... 8
Selecting frequencies ......................................................... 9
Switch iR Infra-Red Controller 10
Controls ................................................................................ 10
Using Switch
iR .................................................................... 11
Technical specification ..................................................... 13
CX iR Diversity Receiver 14
Controls, displays, and connections ............................... 14
Setting up the CX
iR ............................................................ 15
Technical specification ..................................................... 23
TX Blue Pocket Transmitter 24
Controls, displays, and connections ............................... 24
Setting up the TX Blue ....................................................... 25
Technical specification ..................................................... 28
HX iR Hand-Held Transmitter 29
Controls, displays, and connections ............................... 29
Setting up the HX
iR ............................................................ 32
Fitting the microphone capsule ....................................... 38
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Holding the HX iR ................................................................. 39
Technical specification ..................................................... 40
MX iR Receiver 42
Controls, displays, and connections ............................... 42
Setting up the MX
iR ........................................................... 43
External powering .............................................................. 48
Technical specification ..................................................... 49
Aud iR Infra-Red Controller 50
Installing Aud iR ................................................................... 50
Running Aud
iR .................................................................... 51
Troubleshooting 57
Cable wiring diagrams 60
Index 65
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CHAPTER
1
Introduction
This chapter gives a general introduction to radio
microphones, and shows how the products in the
Envoy Range interrelate.
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Audio Limited
Audio Limited has been designing and manufacturing
broadcast quality radio microphone systems since 1963,
and over this period our products have become the
choice of professional sound mixers around the world.
Our systems have acquired an acclaimed reputation for
reliability and transparent sound quality through our
commitment to designing products with maximum input
from the customer.
All of the products designed by us are a result of
listening to our customers.
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The Envoy Range
The Envoy Range of radio microphone system
components eliminates all mechanical switching by
using infra-red remote control. This allows you to
change settings, such as the frequency and audio level,
and check the status of the units, such as the battery
status and settings, even if they are not fully accessible,
such as when mounted in a camera.
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Introduction
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Menu
OK
TX Blue
HX
iR
MX iR
Envoy Envoy
CX
iR
Receivers
Transmitters
Switch iR
Camera
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Introduction
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Infra-red control is provided in the Envoy Range of
receivers, and in the HX
iR hand-held transmitter.
Switch iR
The infra-red controller for the Envoy receivers and the
HX
iR transmitter.
TX Blue
A multi-frequency synthesised UHF pocket transmitter,
for use on location with a range of microphones.
HX iR
A multi-frequency infra-red controlled UHF hand-held
transmitter designed for use with a range of high-quality
interchangeable microphone capsules from the
Schoeps Colettte range.
CX iR
A multi-frequency UHF infra-red controlled true diversity
receiver designed to interface with the internal slot in
several widely used camcorders. It can also be mounted
externally, and used as a portable receiver for
documentary and ENG purposes.
MX iR
A multi-frequency UHF infra-red controlled non-diversity
receiver with internal battery compartment for portable
use in a wide range of applications.
The Envoy products are fully compatible with all
existing RMS 2020 and RMS 2000 Series products.
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Introduction
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Aud
iR
The Envoy Range also includes Aud iR , an application
designed to run on Palm OS compatible organisers.
Aud
iR allows you to display the status of any Envoy
Range device on a single convenient Status screen, and
change any of the settings. In addition, it provides a Plot
Signal function, to plot the signal strength, and a Scan
function, to display a frequency scan:
In effect the Scan function acts like a portable spectrum
analyser dedicated to the receiver being addressed.
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Diversity reception
When electromagnetic waves are radiated by a moving
transmitter, the receiver picks up reflected signals from
surrounding structures as well as the directly radiated
signal. These reflected signals combine with the direct
signal, and in the case where the combining signals are
out of phase with each other, a drop-out or loss of signal
results.
To eliminate this cancellation effect Audio Limited
employ the true diversity technique in the CX
iR receiver.
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The CX iR receiver incorporates two separate receivers
fed by separate antennae. A comparator circuit
compares the RF levels from the two receivers ensuring
that the receiver will always switch to the strongest
signal. A noiseless switching circuit takes full
advantage of the accurate level detection to allow
switching as often as needed without noise or clicks.
The result is a reliable, drop-out free, broadcast-quality
audio signal indistinguishable from a line microphone.
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Selecting frequencies
The Envoy Range provides a choice of 32 pre-
programmed operating frequencies within a 24MHz
block, in the 470MHz to 1000MHz range. This allows you
to select a frequency appropriate to the location.
The Aud
iR Palm OS application can be used in
conjunction with the CX
iR and MX iR receivers to
accurately locate any unused channels in a particular
location, thereby eliminating any guesswork.
The Switch
iR infra-red controller allows you to check
and change the frequency on the CX
iR and MX iR
receivers, and the HX iR transmitter.
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SwitchiR Infra-Red
Controller
The Switch iR is a compact custom-designed infra-
red controller for use with the Envoy Range. It
provides functions to allow you to read the status of
a device, or change its settings. In addition it
includes a convenient built-in 9V battery tester:
<>
Menu
OK
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Controls
V
V
FREQUENCY
MHz
Fr
Display
Scroll buttons
Menu/On button
9V battery
tester
Infra-red port
+
_
OK button
Infra-red port
Point the infra-red port at the front of the Switch iR
directly at the infra-red port of the transmitter or
receiver, keeping the Switch
iR within 30cm of the port.
CHAPTER
2
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