SWIT S-4903T User manual

S-4903T/R
Wireless HD Transmission System
User Manual
Ver:V1.0V01
Please read this ser Manual
throughout before using.

Preface
Congratulations on your purchase of this product. Please read this user manual carefully.
1 ． All internal technologies of this product are protected, including device, software and trademark.
Reproduction in whole or in part without written permission is prohibited.
2 ． All brands and trademarks of SWIT Electronics Co., Ltd. are protected and other relative trademarks
in this user manual are the property of their respective owners.
3 ． Due to constant effort of product development, SWIT reserves the right to make changes and
improvements to the product described in this manual without prior notice.
4 ． The warranty period of this product is 2 years, and does not cover the following:
(1) Physical damage to the products;
(2) Any damage or breakdown caused by use, maintenance, or storage not according to the user
manual’s instructions;
(3) The attenuation of signal quality resulting from being used in any special environments;
(4) Any damage caused by not powering the product by package supplied power adaptor.
(5) Any damage or breakdown not caused by the product’s design, workmanship, or manufacturing
quality, etc.
5 ． For any suggestions and requirements on this product, please contact us through phone, fax, Email,
etc.
SWIT Electronics Co., Ltd.
Address: 10 Hengtong Road, Nanjing Economic and Technological Development Zone,
Nanjing 210038, P.R.China
Phone: [phone]
Fax: [phone]
Email: cont[email protected]
Website: http://www.swit.cc

For Your Safety
Before start, please follo the safety precautions belo
Do not try the followings:
1. nauthorized repairs or parts replacement or other operations.
2. Inappropriate placement including but not limited to lighting, fire, exposure to rain, water or gas.
3. Switch to the power not in the voltage allowable range
 The product
1. Do not use the products near water or in high humidity environments.
2. Do not block the ventilation openings or get substances inside, in order to avoid short circuit, fire
or electric shock.
3. Switch the power off if any liquid or substance gets inside the product. 
 The po er
The products can be powered by battery or 4-pin XLR power adaptor.
When the batteries are attached to the products, please make sure they are correctly and firmly
locked.
Please use the package supplied power adapter. For third party 4-pin XLR adaptor, please make
sure the voltage is within the specified range and the polarity connection is correct.
Please disconnect the power cable under the following situations:
1. If you do not operate this monitor for a period of time;
2. If the power cable or power adaptor is damaged;
3. If the product housing is broken.
 Working Environment
1. Please don't lay this product on the unstable place.
2. Please don’t lay the product on metal shelf, in order to ensure the effective wireless transmission.
3. Please don’t use the products in a place with lots of moisture, soot or dust.
About the radio aves
The products adopt 5.1-5.9GHz wireless frequency, with the low antenna power specified under
international and .S. FCC radio wave regulations. Therefore a license for radio station use is not
required to operate this product.

1. Product Introduction
This broadcast industry wireless system includes S-4903T transmitter and S-4903R receiver, adopts WHDI
(OFDM) technology, supports uncompressed 3G/HD-SDI wirelessly transmitted in 200 meters scale, and with
less than 1ms latency, which is widely used in on-site shooting and director monitoring.
2. Features
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◆◆
◆ Uncompressed 3Gb/s SDI transmission
Support up to 1080p 50/60 uncompressed SDI wireless transmission
◆
◆◆
◆ 200 meters transmission distance
In open outdoor area, the effective transmission distance is approx 200 meters.
◆
◆◆
◆ Less than 1ms latency
There’s no discernible video delay and you can use it as real time on-location monitoring.
◆
◆◆
◆ License free operation frequency
The wireless frequency is 5.1-5.9GHz, license free operated.
◆
◆◆
◆ Transmitting frequencies
The system will auto select from 4-ch frequencies, to ensure the effective transmission. In the same
location, it supports 4-pair transmissions at most.
◆
◆◆
◆ SDI embedded audio transmission
Support CH-1 and CH-2 SDI embedded audio wireless transmission
◆
◆◆
◆ Encryption
Support AES 128-bit encryption to protect the transmission.
◆
◆◆
◆ V-mount fit and po er
Both the transmitter S-4903T and receiver S-4903R are equipped with male and female V-mount, for
V-mount camera mounting and V-mount battery powering.
◆
◆◆
◆ Simple connection
The wireless system is plug-and-play designed, without any software connection and configuration.
Remark:
1. The transmission distance may be different, and depend on surroundings, radio wave conditions, buildings,
etc., the 200 meters transmission distance may be not guaranteed.
2. The wireless transmission might be interrupt if there’re many other devices of 5GHz wireless bandwidth
operated in the in the same location.
3. Signal reception may be affected by the position, height and angle of devices. If reception video is not stable,
please physically adjust placement for the optimized signal.
4. Set the antennas at 45° to each other will enhance the transmission efficiency.
5. The product offers the AES 128-bit encryption to protect the wireless transmission. Anyway, please be ware
of the intentional capture from third person.

3. Product Instruction
Transmitter S-4903T
Front Vie Rear Vie
⑴ SDI IN: 3G/HD-SDI input (BNC connector)
⑵ SDI LOOP: 3G/HD-SDI loop through output (BNC connector)
⑶ Po er: Switch the power on/off
⑷ V-mount po er adaptor
Connect the S-4903T to V-mount cameras or devices, and supply DC power
⑸ LED status indicators
Including Power, Video Signal and Wireless connection condition indicators
⑹ DC-IN
Power the S-4903T via 4-pin XLR adaptor.
Voltage range: DC 7-17V; Pin assign: No.1: negative, No. 4: positive
⑺ V-mount plate
Connect V-mount battery to S-4903T to supply power
⑻ Antenna
The description of LED status indicator
Device Indicators Status Description
Constant On Wireless connected with the receiver
Normal Flashing
Searching the connection with the receiver
NET
Fast Flashing System fault (Meanwhile the VIDEO indicator is fast
flashing as well)
Reserved Off Reserved function
Constant On The receiver S-4903R has got SDI Video output
Normal Flashing
No SDI Video output at the receiver
Video
Fast Flashing System fault (Meanwhile the NET indicator is fast
flashing as well)
Constant On Power connected and switched on
S-4903T
Transmistter
Power Off Power disconnected or switched off

S-4903R Receiver
Front Vie Rear Vie
⑴ Po er: Switch the power on/off
⑵ SDI OUT: 3G/HD-SDI output x2 (BNC connector)
⑶ V-mount po er adaptor
Connect the S-4903R to V-mount devices, and supply DC power
⑷ LED status indicators
Including Power, Video Signal and Wireless connection condition indicators
⑸ DC-IN
Power the S-4903R via 4-pin XLR adaptor.
Voltage range: DC 8-17V; Pin assign: No.1: negative, No. 4: positive
⑹ V-mount plate
Connect V-mount battery to S-4903R to supply power
⑺ Antenna
The description of LED status indicator
Device Indicators Status Description
Constant On Power connected and switched on
Power Off Power disconnected or switched off
Constant On The receiver S-4903R has got SDI Video output
Video Fast Flashing System fault (Meanwhile the NET indicator is fast
flashing as well)
Constant On Wireless connected with the transmitter
Normal Flashing
Searching the connection with the transmitter
NET
Fast Flashing System fault (Meanwhile the VIDEO indicator is fast
flashing as well)
S-4903R
Receiver
Reserved Constant On Reserved function

4. System Connection
1. Check the match codes on the products. The S-4903T and S-4903R with same match codes are allowed to
transmit. (For example: match the S-4903T with “TRANSMITTER ***801” code and the S-4903R with
“RECEIVER ***801” code.)
2. Connect the SDI video source with the “SDI IN” port of S-4903T transmitter.
3. Connect the “SDI O T” port of S-4903R receiver with SDI monitor or receiving devices.
4. Power on the S-4903T and S-4903R by battery or 4-pin XLR DC cable, and the system will search wireless
connection automatically, and display OSD as Pic (1).
5. After 10-20 seconds, the wireless will be connected and the receiver will display OSD as Pic (2).
Pic (1) Pic (2)
Recommended antenna position:
To ensure the transmission efficiency, it is recommended to adjust the antennas at 45° to each other.
See Pic (3) and Pic (4).
Pic (3) Pic (4)

5. Trouble-Shooting
If the receiver failed to output video correctly, and OSD displayed as Pic (5) or Pic (6), please find the solution
from following chart:
Pic (5) Pic (6)
OSD Display Possible Causes Solution
The transmitter S-4903T is powered off Check the power supply of the
transmitter.
Antenna unconnected of either
transmitter or receiver
Fix on the antennas to both transmitter
and receiver, and check the connection
conditions.
The transmission distance is out of
effective range.
Try the wireless transmission at a closer
distance.
Searching
There’re obstacles between transmitter
and receiver, and blocked the signal
transmission.
Try to get rid of the obstacles, or operate
at a closer transmission distance
Connected to TX1,
Please Check
Video Source
There’s no recognized video input at
transmitter side.
Check the SDI video source and cable
connections of S-4903T transmitter.
(See the supported SDI format at 6.
Specifications)
The wireless transmission is disturbed by
environment, such as other electronic
devices in the same location.
Wait 60 seconds or restart the transmitter
and receiver
Please wait, this
action may take up
to 60Sec The transmission distance is out of
effective range.
Try the wireless transmission at a closer
distance.

6. Specifications
Model S-4903T S-4903R
Input 3G/HD-SDI input×1 Wireless receiving
Output 3G/HD-SDI loop output ×1
Wireless transmitting 3G/HD-SDI output ×2
SMPTE-425M 1080p (60 / 59.94 / 50)
SMPTE-RP211 1080psf (30 / 29.97 / 25 / 24 / 23.98)
1080p (30 / 29.97 / 25 / 24 / 23.98)
SMPTE-274M 1080i (60 / 59.94 / 50)
SDI Format
SMPTE-296M 720p (60 / 59.94 / 50)
Wireless frequency 5.1
～ 5.9GHz License-free
Radio modules OFDM
Max Transmission
distance Approx 200m
Latency
≤ 1ms
Power consumption
≤ 10W
Radio power
≤ 63mW ∕
Input voltage DC 7
～ 17V DC 8 ～ 17V
Working environment
Temperature: 0°C -+40°C
Dimension 146×344×58 (with antenna)
Net weight 624g (with antenna) 655g (with antenna)
7. Packing List
S-4903T Transmitter × 1 S-4903R Receiver × 1 Antenna × 7
Power cable × 2 4-pin XLR Power adaptor × 2