Sentryus Kw2425 User manual

1 R201211-V07

User Manual

2.4GHz Digital Audio/Video Transmitter & Receiver Kit

KW24K

A) Introduction

The 2.4GHz Digital Audio/Video 4CH Transmitter & Receiver Kit is a digital wireless MPEG4 audio/video system that

uses 2.4GHz Frequency Hopping technology and GFSK (Gaussian Frequency-Shift Keying) modulation, and random

ID codes to protect personal privacy and prevent unauthorized access to the system. There are over one billion

hopping sequences to minimize interference and deliver consistently an excellent video and audio quality for up to

500ft / 150m away.

Using this 2.4GHz Digital Audio/Video 4CH Transmitter & Receiver Kit, you can enjoy greater convenience and

security in many ways.

Connect a camera to a wireless security system.

Monitor your sleeping baby, playing children, the elderly, or the disabled on TV using your existing camcorder.

See who is outside the door on TV through your camera or miniature CCD camera.

Monitors and records meetings from another room.

And many more!

B) Features

Interference-free (Wi-fi, Bluetooth, Microwave-oven, Cordless phones, etc.)

Real time monitoring and recording

MPEG4 compression

Auto-pairing; Data rate up to 6Mbps

Transmission distance up to 500ft / 150m (clear line of sight)

Video resolution of 720x480 @ 30fpts (NTSC) or 768x576 @ 25fps (PAL)

3dBi omni-directional antenna

5V DC

KW2425 KW2420

2 R201211-V07

C) Package Contents

Please check the following items inside the box for 2.4GHz Digital Audio/Video Kit, and contact your dealer if anything

is missing.

One (1) set of 2.4GHz Digital Audio/Video 4CH Transmitter-Tx and Receiver-Rx

Two (2) Antennas

Two (2) Audio/Video Cables (3.5mm plug to 3 RCA plug)

Two (2) Power Adaptor (100V ~ 240V AC, 5V DC / 1Ain Jack)

Transmitter-Tx and Receiver-Rx (with Antenna) Audio/Video Cable x2 5V DC x2

D) Product Parts

E) Pairing the Transmitter-Tx & Receiver-Rx

Before shipment these products have been matched by ID code, so you can immediately use them out of the box. To re-pair them,

you have to follow the instructions below:

1. Power on the Tx and Rx by inserting the power adaptor jack.

2. Press the pair button of Tx or Rx and do not release until the power LED begins to flash.

3. The devices will enter into pairing state and automatically link to one another by ID code.

4. Do not unplug the power during the paring process.

5. When pairing is completed, the power LED for both devices will stop flashing and stay lit.

* This system uses 5V DC. Do not use any other power supply.

Please note:

Pressing the pairing buttons on the Tx and Rx at the same time is not necessary. Put

one device in pairing mode, then the other. When pairing the Tx and Rx, place them

about 10ft / 3m apart. The display picture will show the signal strength in the top right

corner on the picture.

Pairing

button Power

LED

Pairing

button Power

LED

DC Jack for

power adaptor DC Jack for

power adaptor

A/V Jack for

Output (Tx)

or In

(

)

A/V Jack for

Output (Tx)

or In

(

)

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F) Specifications

Transmitter - Tx Receiver - Rx

Model KW24K - Kit

KW2425 - Tx KW2420 - Rx

Video Type NTSC / PAL

Video Compression MPEG4

Video Resolution 720x480 @ 30fpts (NTSC) or 768x576 @ 25fps (PAL)

Operating Frequency Band 2.400GHz~2.4835 GHz

Data Rate Up to 6Mbps

Receiver Sensitivity -- -85dBm

Transmission Channels 80 channels auto selection

Modulation 16QAM/QPSK/BPSK

Video Bit Rate Up to 12Mbps

ideo Input Level 1V p-p, 75 ohms 1±0.2V p-p, 75 ohm

Audio Input Level 1V p-p, 600 ohm (STEREO) 1±0.2V p-p, 600 ohm (STEREO)

Audio/Video Port In, 1x Video, 2x Audio (L/R) Out, 1x Video, 2x Audio (L/R)

Random ID Code Up to 4 million sets

Antenna Omni-directional, 3dBi

Operational Range Up to 500ft / 150 (clear line of sight)

PA Output Power 16dBm

Maximum Transmission Power 100mW --

Power Consumption 1.9W

Power Supply 5V DC, 1.2A for AC Adaptor

Dimension 76mm x 73mm x 24mm

Weight 82g

*Specifications are subject to change without notice

G) Troubleshooting

Problems Possible Solution

No picture or sound

Check all cable connections

Make sure power plugs are pushed all the way in

Check power switches on the remote TV or DVR and Video source (Camera, Camcorder,

etc.)

Check if the POWER LED of the Tx and Rx are lighted. The LINK LED should be lit under

normal operation.

If their LINK LED are not lit, re-pair the devices by following the instructions in section E of

this manual.

Interference: picture or audio

Adjust Tx and Rx antenna orientation

Try to place Tx and Rx closer to one another.

If using a microwave oven, turn it off.

Remove microwave oven from path between Tx and Rx.

Cautions

1. Be sure the Tx and Rx are connected to the equipment correctly (e.g. Connect the transmitter to the camera, and the receiver

to the TV or DVR).

2. When DC plug is pulled out from Tx or Rx, wait a few seconds before inserting it again.

3. Adjust antenna to decrease interference (vertical or horizontal).

4. For optimal reception, place the devices in an un-obstructed environment (open space) and/or in direct line of site. Place the

device as high as possible to avoid obstacles and at least 5ft / 1.5m from one another.

5. If for some reason the devices stop working, try to turn power off and back on again after 30 seconds for them to re-link.

6. It is suggested not to exceed 10 pairs of Tx and Rx in any one location.

LIMITED ONE (1) YEAR WARRANTY AND EXCLUSIONS

Manufacturer warrants to the original consumer purchaser and not for the benefit of anyone else that this product at the time of its sale by Manufacturer

is free of defects in materials and workmanship under normal and proper use for one (1) year from the purchase date. Manufacturer's only obligation is

to correct such defects by repair or replacement, at its option, if within such one (1) year period the product is returned prepaid, with proof of purchase

date, and a description of the problem. This warrant excludes and there is disclaimed liability for labor for removal of this product or reinstallation. This

warranty is void if this product is installed improperly or in an improper environment, overloaded, misused, opened, abused, or altered in any manner, or

is not used under normal operating conditions or not in accordance with any labels or instructions. There are no other implied warranties of any

kind, including merchantability and fitness or a particular purpose, but if any implied warranty is required by the applicable jurisdiction, the

duration of any such implied warrant, including merchantability and fitness of or a particular purpose, is limited to one (1) year. Manufacturer is not