Applied Wireless AVT900-3A User manual

User’s Guide
Instructions for Installation and Operation
900 MHz Audio / Video Transmitter
Models AVT900-3A
AVT900-3B
900 MHz Audio / Video Receiver
Model AVR900-3
Long Range Wireless Applications

Applied Wireless, Inc.
900 MHz Audio / Video Transmitters
Models AVT900-3A
AVT900-3B
900 MHz Audio / Video Receiver
Model AVR900-3
Product Descriptions
Models AVT900-3A and AVT900-3B from Applied Wireless, Inc. are
high quality transmitters designed to broadcast standard NTSC or PAL
video signals, plus line-level audio signals, to the Applied Wireless model
AVR900-3 receiver. Model AVT900-3A conforms to FCC Part 15
requirements for unlicensed use, and will transmit over distances up to 750
feet.* Model AVT900-3B provides higher RF output power, to transmit
over extended distances up to 2,900 feet.* Due to its increased RF output
power, Model AVT900-3B is reserved for use by law enforcement or
military agencies only. The range may be increased substantially through
the use of a directional antenna (such as a flat panel or Yagi) at the
receiver.
* Unobstructed, straight line-of-sight range, when used with the standard antennas
included with the transmitter and receiver.
NOTE: Throughout this User’s Guide, the designation
“AVT900-3” refers to both transmitter models, AVT900-3A
and AVT900-3B, when the information presented applies
equally to both. When information is specific to one model
or the other, the specific model number shall be used.
The AVT900-3 transmitter and the AVR900-3 receiver provide three user-
selectable channels of operation within the 902 – 928 MHz band to enable
simultaneous operation of multiple transmitters in a common area.
Excellent frequency stability is assured through the use of crystal
references. The products incorporate precise FM modulation and
sophisticated filters to provide stable, interference-free high quality color
or B/W video plus audio reception.

The transmitter and receiver are housed in small yet rugged aluminum
extrusion enclosures. AC power converters (12VDC) are supplied, along
with RCA phono-type video and audio cables.
The AVT900-3 transmitter and the AVR900-3 receiver are well-suited for
many diverse applications, including distribution of AV entertainment
content throughout a building, commercial and industrial surveillance,
monitoring, security, access control, etc.
Using the AVT900-3 in Non-Stationary Applications
If the AVT900-3 is to be used in an application in which it will be moving
while broadcasting (such as with a hand-held video camera, for example),
it is strongly suggested that the Applied Wireless Diversity Receiver
(model DAV900-3) be utilized. This advanced multi-antenna receiver will
minimize the effects of multipath interference to provide more stable
video images and audio reproduction. The improvement in performance is
especially noticeable when the distance between the transmitter and
receiver is extended and/or obstructions exist between them.
Installation Instructions
Before Beginning the Installation
Plan your installation carefully. The physical location and orientation of
the transmitter itself (and its antenna) relative to the receiver antenna will
have a significant influence on reception quality at the receiver,
particularly at longest ranges. For best results, the transmitter and its
standard antenna, as well as the receiver antenna, should be
positioned vertically (pointing either up or down). If necessary, use
double-sided foam tape or hook & loop fasteners (not supplied) to secure
the transmitter to a vertical surface. Also, keep in mind that the RF signal
from the transmitter will travel through most non-metallic building
materials (wood, stucco, brick, etc.), however maximum stated reception
range is based on unobstructed line of sight conditions.

Selecting the Channel of Operation
Referring to Figure 1, use a small flat-blade screwdriver to select the
channel (frequency) on which the transmitter will operate, by aligning the
triangle-shaped pointer (not the screwdriver slot) to the number of the
desired channel. Set the receiver to the matching channel. Channels are as
follows:
Channel 1: 907 MHz
Channel 2: 915 MHz
Channel 3: 923 MHz
Any other setting of the channel selector (0, 4, 5, 6, 7, 8, 9) defaults to
Channel 1.
If two AVT900-3 transmitters are to be used simultaneously in a common
area (so as to broadcast two different audio & video sources), set one unit
to Channel 1 and the other unit to Channel 3. It is not advisable to attempt
to use three units simultaneously.
Connecting Video and Audio to the AVT900-3
Following the guidelines below, connect line level audio and video
sources (outputs from a DVD player, for example) to the corresponding
line-level input jacks on the transmitter’s rear panel (refer to Figure 2).
Appropriate shielded cables are supplied with the transmitter for making
these connections.
Audio – If a microphone is to be used as the audio source, an external
microphone preamp (not supplied) must be used to raise the microphone’s
output signal to the required line level.
Figure 1 – AVT900-3 Front Panel
(AVR900-3 similar)

Video – The AVT900-3’s video input presents a terminated 75-ohm load
to the output of the video source device. Accordingly, no other device(s)
besides the AVT900-3 should be connected to the video source. If any
additional device(s) must be driven by the source device, a video
distribution amplifier (not supplied) must be used.
Connecting the Receiver’s Video and Audio Outputs
Using the shielded cables provided, connect the receiver’s line level video
and audio outputs to the appropriate inputs on the device that is to display,
record, or process the received video and audio signals.
Connecting Power to the Transmitter and Receiver
The AVT900-3 and the AVR900-3 each require an external power source
of between 7.5 and 18 volts DC. A plug-in power converter (12VDC) is
supplied with each unit.
CAUTION: Do not apply power to the AVT900-3 transmitter
unless the supplied antenna is attached to its mating jack
on the front panel. Powering the transmitter without an
antenna may result in failure of the transmitter’s RF
output device and void the warranty.
Insert the power converter’s 2.1mm plug into the DC IN jack on the unit’s
rear panel (refer to Figure 2). Plug each converter into a live 120VAC
outlet. The unit’s red Power indicator LED (on the front panel, refer to
Figure 1) should illuminate.
Figure 2 – AVT900-3 Rear Panel
(AVR900-3 similar)

Using the Combination Power/Video/Audio Connector(s)
As an alternative to using standard audio and video interconnect cables,
the AVT900-3 transmitter and the AVR900-3 receiver each provide a
combination Power/Video/Audio connector on the unit’s rear panel. The
pinout of these connectors is the same for both transmitter and receiver.
The pinout of the combination Power/Video/Audio jack, and its mating
plug (not supplied), is illustrated in Figure 3 and Table 1. Contact Applied
Wireless, Inc. if you wish to purchase an optional Combination
Power/Video/Audio cable.
Signal Strength Indicator (AVR900-3 Receiver)
The AVR900-3 receiver will display the relative strength of the received
RF signal, by illuminating some or all of the four red Signal Strength
LEDs on the front panel. The Signal Strength indicator(s) will also
illuminate if local in-band interference is present. If the Signal Strength
LEDs are indicating that a strong signal is being received, and yet the
video and/or audio quality is poor, turn off the transmitter (by unplugging
its power connector). If the receiver’s Signal Strength LEDs continue to
indicate reception of a strong signal, changing the channel of operation (on
both the transmitter and receiver) may improve the results.
Table 1 - Combination Connector Pinout
Pin Circuit
1 DC Power In (+7.5 to +18 volts)
2 DC Ground
6 Video (+)
3 Video Ground
5 Audio (+)
4 Audio Ground
Figure 3
Combination Jack
(on Rear Panel) Combination Plug
(rear view)

If the source device has stereo audio
outputs, a “Y” adaptor may be used to
combine the Left and Right channels
into a single (mono) signal.
Transmitter Connection Diagram
L
e
f
t
Right
Composite
Video Output Audio Outputs
Source Device (e.g. DVD Player, camcorder,
surveillance camera, etc.)
For maximum range,
transmitter and antenna must
be oriented vertically.
Rear panel of transmitter
A
C Adapto
r

A
C Adapto
r
For maximum range, the receiver’s
antenna must be oriented vertically.
Left Right
Composite
Video Input Audio Inputs
Line Level Inputs
VIDEO
OUT AUDIO OUT
Rear panel of receiver
If the display device has stereo
audio inputs, a “Y” adaptor may be
used to connect the receiver’s
mono audio output to both the Left
and Right channel inputs.
Display device (e.g. TV, video
monitor, VCR, DVR, etc. )
Receiver Connection Diagram

Transmitter Specifications (AVT900-3A, AVT900-3B)
Operating Frequency
Channel 1 907 MHz
Channel 2 915 MHz
Channel 3 923 MHz
Video Frequency Response* 0.5 – 4.0 MHz
Audio Frequency Response (+/- 1dB)* 20-20,000 Hz
Audio Signal-to-Noise Ratio* 50 dB
Audio Distortion (THD, @ 1kHz)* 1%
RF Output Power (AVT900-3A) 1 mW (0 dBm)
RF Output Power (AVT900-3B) 90 mW (+19 dBm)
Operating Voltage 7.5 to 18VDC
Operating Current (AVT900-3A) 65 mA
Operating Current (AVT900-3B) 135 mA
FM Deviation (@ 1V P-P input) +/- 3 MHz
Differential Gain Error 3% p-p (max)
Differential Phase Error 3% p-p (max)
Harmonic Suppression -45 dBc
Antenna Output Impedance 50 Ohms
Operating Temperature Range -20°C to +70°C
Storage Temperature Range -50°C to +150°C
*Video and audio performance specifications are “end-to-end”
characteristics, when used with Model AVR900-3 receiver.

Receiver Specifications (AVR900-3)
Operating Frequency
Channel 1 907 MHz
Channel 2 915 MHz
Channel 3 923 MHz
Video Frequency Response (-3 dB)* 0.5 – 4.0 MHz
Audio Frequency Response (+/- 1dB)* 20-20,000 Hz
Audio Signal-to-Noise Ratio* 50 dB
Audio Distortion (THD, @ 1kHz)* 1%
RF Input Sensitivity (30 dB SNR) -85 dBm
Operating Voltage 7.5 to 18VDC
Operating Current 160 mA
Differential Gain Error 5% p-p (max)
Differential Phase Error 5% p-p (max)
Video Output, +/- 3MHz Deviation 1.0 Vp-p
Video Output Impedance 75 Ohms
IF Frequency 75 MHz
IF Bandwidth 12 MHz
Harmonic Suppression -45 dBc
Antenna Impedance 50 Ohms
Image Rejection 80 dB
Operating Temperature Range -20°C to +70°C
Storage Temperature Range -50°C to +150°C
*Video and audio performance specifications are “end-to-end”
characteristics, when used with Model AVT900-3 transmitter.

The following section pertains exclusively to the standard-version
Audio/Video Transmitter, Model AVT900-3A:
INSTRUCTION TO THE USER (required by the FCC)
This equipment has been tested and found to comply with the limits for a
class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
This equipment has been certified to comply with the limits for a class B
computing device, pursuant to FCC Rules. In order to maintain
compliance with FCC regulations, shielded cables must be used with this
equipment. Operation with non-approved equipment or unshielded cables
is likely to result in interference to radio and TV reception. The user is
cautioned that changes and modifications made to the equipment without
the approval of manufacturer could void the user’s authority to operate
this equipment.

ONE YEAR LIMITED WARRANTY (USA)
Products manufactured by APPLIED
WIRELESS, INC. (AW) and sold to
purchasers in the USA are warranted by AW
according to the following terms and
conditions. You should read this Warranty
thoroughly.
•WHAT IS COVERED,AND DURATION OF
COVERAGE:
AW warrants the product to be free from
defects in materials and workmanship for one
(1) year from the date of purchase by the
original end user purchaser.
•WHAT IS NOT COVERED:
This warranty does not apply to the following:
1. Damage caused by accident, physical or
electrical misuse or abuse, improper
installation, failure to follow instructions
contained in the User’s Guide, any use
contrary to the product’s intended
function, unauthorized service or
alteration (i.e. service or alteration by
anyone other than AW).
2. Damage occurring during shipment.
3. Damage caused by acts of God,
including without limitation: earthquake,
fire, flood, storms, or other acts of
nature.
4. Damage or malfunction caused by the
intrusion of moisture or other
contamination within the product.
5. Batteries supplied by AW in or for the
product.
6. Cosmetic deterioration of chassis,
cases, or pushbuttons resulting from
wear and tear typical of normal use.
7. Any cost or expense related to trouble-
shooting to determine whether a
malfunction is due to a defect in the
product itself, in the installation, or any
combination thereof.
8. Any cost or expense related to repairing
or correcting the installation of an AW
product.
9. Any cost or expense related to the
removal or reinstallation of the product.
10. Any product whose serial number or
date code is altered, defaced,
obliterated, destroyed, or removed.
This warranty is extended to the original
purchaser of the product(s) only, and is not
transferable to any subsequent owner or
owners of the product(s). AW reserves the
right to make changes or improvements in its
products without incurring any obligation to
similarly alter products previously purchased.
•EXCLUSION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES:
AW expressly disclaims liability for incidental
and consequential damages caused (or
allegedly caused) by the product. The term
“incidental or consequential damages” refers
(but is not limited) to:
1. Expenses of transporting the product to
AW to obtain service.
2. Loss of use of the product.
3. Loss of the original purchaser’s time.
•LIMITATION OF IMPLIED WARRANTIES:
This warranty limits AW’s liability to the repair
or replacement of the product. AW makes no
express warranty of merchantability or fitness
for use. Any implied warranties, including
fitness for use and merchantability, are
limited in duration to the period of the one (1)
year express limited warranty set forth herein.
The remedies provided under this warranty
are exclusive and in lieu of all others. AW
neither assumes nor authorizes any person
or organization to make any warranties or
assume any liability in connection with the
sale, installation, or use of this product.
Some states do not allow limitations on how
long an implied warranty lasts, and some
states do not allow the exclusion or limitation
of liability for incidental or consequential
damages so the limitations or exclusions
stated herein may not apply to you. This
warranty gives you specific legal rights and
you may have other rights which vary from
state to state.
(continued on next page)

ONE YEAR LIMITED WARRANTY (USA), cont.
•HOW TO OBTAIN WARRANTY SERVICE:
If a product covered by this warranty and sold in the USA by AW proves to be defective during the
warranty period AW will, at its sole option, repair it or replace it with a comparable new or
reconditioned product without charge for parts and labor, when said product is returned in compliance
with the following requirements:
1. You must first contact AW at the following address/phone for assistance:
APPLIED WIRELESS, INC.
1250 Avenida Acaso, Suite F
Camarillo, CA 93012
Phone: [phone]
If you are instructed to return your product directly to the factory, a Return Merchandise
Authorization number (RMA) will be issued to you.
2. You must package the product carefully and ship it insured and prepaid. The RMA number must
be clearly indicated on the outside of the shipping container. Any product returned without an
RMA number will be refused delivery.
3. In order for AW to perform service under warranty, you must include the following:
(a) Your name, return shipping address (not a PO Box), and daytime telephone number.
(b) Proof of purchase showing the date of purchase.
(c) A detailed description of the defect or problem.
Upon completion of service, AW will ship the product to the specified return shipping address. The
method of shipping shall be at AW’s sole discretion. The cost of return shipping (within USA) shall be
borne by AW.

Applied Wireless products are designed and manufactured
with pride in the United States of America
©Copyright 2007 by Applied Wireless, Inc. All rights reserved.
Specifications subject to change without notice.
APPLIED WIRELESS,INC.
1250 Avenida Acaso, Camarillo, CA 93012
Phone: [phone] Fax: [phone]
Email: [email protected]
www.appliedwireless.com
Pub. # UG-AVTR90032 Rev. date 01/07