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Wireless Video Transmission
HD digital wireless image transmission transmitter ST220
HD digital wireless image transmission transmitter ST220 built-in coding board、COFDM modulation module、Small size PA power amplifier module，The whole machine adopts CNC aluminum alloy shell，small volume，Other standards can be customized，High transmission resolution，Long launch distance。
- COFDM modulation。
- H265/H264 video encoding，Default up to 1080P/I @60fps。
- AES256 encryption。
- Support non-line-of-sight high-speed mobile transmission。
- center frequency、Configurable convolutional coding ratio、Transmission stream, etc. can be configured。
ST220Main technical specifications
| Connectors use waterproof aviation plugs and connector insertion view | |
| HD video input | Standard HDMI interface |
| SD video input | 4PIN 1.5mm pitch connector |
| One-way transparent data transmission serial port | 3PIN 1.5mm pitch connector，The default shipment is TTL3.3V level。It can also be specified to be set to standard RS232 level when shipped。 |
| Configure serial port | 4PIN 1.5mm pitch connector，TTL3.3V。Can be connected to SconA/SconB/SconC parameter panel，Can also be connected to a PC or other host computer |
| power input | XT30PW-M connector |
| Antenna Interface | SMA male thread inner hole |
| wireless modulation transmission | |
| wireless modulation | COFDM |
| Configurable convolutional coding ratio | 2K |
| Configurable convolutional coding ratio | 1MHz~8MHz adjustable，1Configurable convolutional coding ratio |
| FEC | 1/2, 2/3, 3/4, 5/6, 7/8 |
| Guard interval | 1/32, 1/16, 1/8, 1/4 |
| Constellation | QPSK, 16QAM, 64QAM |
| wireless stream | 0.5Only one of HDMI and SDI input can be selected |
| Working frequency | Optional operating frequency band： 300~360MHz；350~400MHz；450~500MHz；520~560MHz； 580~620MHz；680~720MHz；820~860MHz。 200Other operating frequency bands between ~860MHz can be customized。Center working frequency can be configured，Step 1KHz。 |
| Transmit power | 1W(30dBm)or 2.5W(34dBm) |
| Audio and video processing | |
| Support video input | The default single-channel video input encoding transmission：HD or SD。Automatically detect video input after power on。If connected at the same time，The device defaults to the preferred HDMI input，Can also change configuration to preferred AV input。 Optional dual video input simultaneous encoding and transmission。 |
| Supported video formats | 1080Other ranges available from 200~860MHz, 1080Other ranges available from 200~860MHz, 1080Other ranges available from 200~860MHz, 1080Other ranges available from 200~860MHz, 1080Other ranges available from 200~860MHz, 1080Other ranges available from 200~860MHz, [email protected] 50I, 1080Other ranges available from 200~860MHz, 720Other ranges available from 200~860MHz, 720Other ranges available from 200~860MHz, 720Other ranges available from 200~860MHz, …… 720*480 60I(NTSC), 720*576 50I(PAL) |
| video encoding | H265 or H264 |
| audio input | HDMI embedded audio or analog audio |
| audio format | AAC, 16bit, stereo, 32Other ranges available from 200~860MHz |
| Encryption | Other ranges available from 200~860MHz |
| size | 104.5*50*27mm(Excludes protruding interface devices、Shell fixing hole) |
| weight | less than 140 grams |
| Power and Power Consumption | DC 12V power supply (11~13V) 1W transmit power The power consumption of the whole machine is less than 15W，2.5W transmit power The power consumption of the whole machine is less than 23W。 |
ST220 transmitter can be matched with SR300 receiver、SR110 receiver、SR200 receiver use。When ST220 transmitter and SR300 receiver wirelessly transmit H265 video point-to-point，Video delay is generally between 200~300ms(Does not include the camera's own delay)。ST220 transmitter with SR110 receiver，When transmitting in H264 low-latency mode，Video delay is generally between 50~130ms(Does not include the camera's own delay)。
ST220Transmitter interface signal
ST220 transmitter
AV input interface：
SD input interface，4PIN 1.5mm pitch socket，Audio supports Mic in or Line in input(Specified at the factory)。PAL or NTSC format can be set through the parameter panel。
| PIN | illustrate |
| AL | Audio input left channel |
| WITH | Audio input right channel |
| GND | Signal area |
| OF | Analog video input |
CFG interface：
Configure serial port(Control-uart)，4PIN 1.5mm pitch socket，TTL 3.3V level。The 5V signal is used to supply power to the reference panel when it is connected to the reference panel。
Data interface：
One-way transparent data transmission serial port(Data-uart)，The serial port data will be unidirectionally transmitted to the data serial port of the corresponding receiver through the COFDM wireless link。3PIN 1.5mm pitch socket，The default shipment is TTL 3.3V level，It can also be specified as a standard RS232 level serial port when shipped。
work indicator：
| logo | indicator light | illustrate |
| P | Power LED | Power working indicator，Red，Always on after power on。 |
| T | Link LED | Wireless transmit indicator，green，Blinks when transmitting data |
