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S-4904
SDI/HDMI 700m Wireless Transmission System

◆ Professional WHDI (MIMO/OFDM) technology
◆ Uncompressed 3G/HD/SD-SDI and HDMI

◆ 2-ch SDI/HDMI embedded audio transmission
◆ 700 meters (LOS) transmission distance
◆ Less than 1ms latency
◆ 5.1-5.9GHz license-free operation frequency
◆ User configurable frequency bands
◆ Multicast – 1 transmitter to multi receivers
◆ Less than 63mW radio power
◆ AES 256bit encryption
◆ V-mount / Gold Mount connections
◆ All-metal housing, durable
◆ Pure hardware connection; Plug and Play

S-4904
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  • Technical Description
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WHDI wireless transmission system

SDI and HDMI, 700 meters

S-4904 is the broadcast industry wireless system, includes an S-4904T transmitter and an S-4904R receiver, with WHDI (OFDM) technology, supports uncompressed 3G/HD/SD-SDI and HDMI wirelessly transmitted in 700 meters scale, and with less than 1ms latency. The system is pure hardware connection, plug and play build-up, which is widely used in on-site shooting and director monitoring.




 

Input and Output

The transmitter S-4904T supports:
3G/HD/SD-SDI input ×1
HDMI ×1
The receiver S-4904R supports:
3G/HD/SD-SDI output ×1
HDMI x1
The receiver SDI and HDMI are output simultaneously.
If both SDI and HDMI is input to transmitter, the receiver will give priority to output SDI signal.







Approx. 700m Effective Distance


Uncompressed SDI/HDMI, less than 1ms latency


In Line of Sight, the S-4904 wireless transmission system support approx. 700 meters effective transmission distance of uncompressed 3G/HD/SD-SDI and HDMI signal, and the latency is less than 1 millisecond.






 

 

 

Embedded Audio Transmission

The S-4904 supports SDI and HDMI embedded audio (ch-1 & ch-2) transmission.





5.1-5.9GHz Operation Frequency


License Free


The S-4904 wireless system runs at 5.1-5.9GHz License-free operation frequency. The frequency bands are user configurable and support at most 4 wireless channels in one location.
The radio power is less than 63mW and will not do harm to human bodies.

 

 

 

 

 

Multicast support


1 transmitter to multi receivers


You can set several S-4904R receivers at the same frequency bands as the 1 S-4904T transmitter to enable the multicast mode.




 


Power Supply and Installation


V-mount or Gold mount optional


The transmitter S-4904T is equipped with V-mount or Gold mount plates, to be easily fixed on cameras and attached with batteries.
The receiver S-4904R is equipped with V-mount or Gold mount plates to be powered by batteries.
Both the transmitter and receiver can also be powered via the 5.5/2.1mm pole DC in socket of 6.5-17V input.

Standard Package

The wireless system package provides:
1x S-4904T Transmitter (V-mount / Gold mount optional)
1x S-4904R Receiver (V-mount / Gold mount optional)
7x Antennas
1x Articulating arm trestle
1x Crab clamp
1x D-tap to 5.5/2.1mm pole cable
1x 5.5/2.1mm pole power adaptor
2x Flat screwdriver (for band configuration)

Input Video Formats

S-4904T transmitter supports the following input video formats:
InputSupported formats
SDISMPTE-425M1080p (60 / 59.94 / 50)
SMPTE-274M1080i (60 / 59.94 / 50)
1080p (30 / 29.97 / 25 / 24 / 23.98)
SMPTE-RP2111080psf (30 / 29.97 / 25 / 24 / 23.98)
SMPTE-296M720p (60 / 59.94 / 50)
SMPTE-125M480i (59.94)
ITU-R BT.656576i (50)
HDMI format1080p (60 / 59.94 / 50 / 30 / 29.97 / 25 / 24 / 23.98)
1080i (60 / 59.94 / 50)
720p (60 / 59.94 / 50)
480i / 576i












The S-4904R receiver output formats are the same with input formats

How to Get the Best Effect of Wireless Transmission


(1) Set the antennas of S-4904T and S-4904R at different angles to extend the transmission distance and achieve stable transmission quality.
(2) Set the receiver S-4904R as high as possible.
(3) Avoid walls, trees, water and any blockage as best as you can.

How to Use Several Sets in One Location

There’re 0-9 frequency channels that can be dial switch by users.
In one location, to avoid interference to each other, we recommended:
2 sets transmission:
Set 1: channel 3
Set 2: channel 4
3 sets transmission:
Set 1: channel 3
Set 2: channel 7
Set 3: channel 4
We don’t suggest that use 4 or more sets of wireless transmission in one location.
Frequency point in detail:

Dial Channels

Frequency

Channel 0

5550 MHz

Channel 1

5590 MHz

Channel 2

5630 MHz

Channel 3

5670 MHz

Channel 4

5150 MHz

Channel 5

5190 MHz

Channel 6

5230 MHz

Channel 7

5270 MHz

Channel 8

5310 MHz

Channel 9

5510 MHz

 

 

 

 

 

 

 

 

 

Remark: all channels provide the central frequencies;
Bandwidth is 40MHz for each channel.

ModelTransmitter S-4904TReceiver S-4904R
Input3G/HD/SD-SDI×1/
HDMI×1
Output/ 3G/HD/SD-SDI×1
HDMI×1
SDI FormatSMPTE-425M1080P (60 / 59.94 / 50)
SMPTE-274M1080i (60 / 59.94 / 50)
1080p (30 / 29.97 / 25 / 24 / 23.98)
SMPTE-RP2111080psf (30 / 29.97 / 25 / 24 / 23.98)
SMPTE-296M720p (60 / 59.94 / 50)
SMPTE-125M480i (59.94)
ITU-R BT.656576i (50)
HDMI format1080p (60 / 59.94 / 50 / 30 / 29.97 / 25 / 24 / 23.98)
1080i (60 / 59.94 / 50)
720p (60 / 59.94 / 50)
480i / 576i
Wireless frequency5.1~5.9GHz
Radio modulesOFDM 16QAM
Max Transmission distanceApprox 700m (Line of sight)
Latency≤1 millisecond
Power consumption≤6.5W≤6.5W
Radio powerMax 63mW/
Input voltageDC / Battery:6.5~17VDC / Battery:6.5~17V
Working environmentTemperature: 0°C -+40°C
Dimension93×185×63 (mm)130×188×47 (mm)
Net weight(with antenna)572g797g

 

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Please contact SWIT at:

 

Telephone:+86-25-85805753
Fax: +86-25-85805796
Email: contact@swit.cc
Address: 10 HengTong Road, Xin’gang, Nanjing
Economic and Technological Development Zone
Nanjing, 210038, P. R. China.

 

 

 


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