SPECIFIC INFO
FOREWORD
Thank you for purchasing the Hollyland SYSCOM 421S Wireless HD Video Transmission System. Please read this manual carefully before using the product and wish you a pleasant experience.
KEY FEATURES
- 1800ft Transmission Range
- The Lowest Achievable Latency without Interference is under 0.1s
- 5.1-5.9 GHz Band Width, Supports Frequency Configuration for Different Territories
- Supports 4 SDI Input and HDMI Input, 4SDI Output and HDMI Output
- 4 Transmitters Use the Same Wireless Channel with Strong Anti-Interference Ability
- Supports TALLY and RS485/RS422 Control
- Transmitter Supports 7-36V DC Wide Voltage Input
- Receiver Supports 18-36V DC Wide Voltage Input
- Stable & Reliable Industrial Metal Case
- With RJ45 Interface, Supports Network Pass Through between Transmitter and Receiver, and Achieves RTSP Pull and Push Streaming
PACKING LIST
- ① Transmitter: x4
- ② Receiver: x1
- ③ 5GHz Antenna: x25
- ④ User Guide: x1
- ⑤ 7-Inch Magic Arm: x4
- ⑥ OTG Cable: x1
- ⑦ DC Conversion Cable: x4
- ⑧ RS485/RS422 Interface Cable: x5
- ⑨ Power Adapter: x1
TYPICAL SETUP
Diagram illustrates a typical setup. Four transmitters (labeled 1-4) are shown connected to cameras via HDMI/SDI and LAN/RS485/RS422. A central receiver is connected to a monitor (HDMI/SDI), a switchboard (HDMI/SDI), a camera controller (RS485/RS422), and a PC (LAN). Diagram shows recommended antenna placement for optimal stability, indicating a 10-meter distance for one setup and a 2-meter distance for another, highlighting the importance of considering height differences between transmitter and receiver. It suggests using mushroom antennas (optional accessories) when there's a significant height difference.PRODUCT INTERFACES
Diagrams labeled A (Transmitter) and B (Receiver) show the physical interfaces on each device.- Transmitter (A) Interfaces:
- ① RP-SMA Antenna Male Interface
- ② 3-Segment 3.5mm TALLY Output
- ③ USB Type-C Interface
- ④ HDMI Input
- ⑤ SDI Input
- ⑥ DC Power Input
- ⑦ OLED Display
- ⑧ UP Button
- ⑨ MENU Button
- ⑩ DOWN Button
- ⑪ RS485/RS422 Interface
- ⑫ LAN Interface
- ⑬ DC Power Switch
- ⑭ 3/8-16 Screw Hole
- ⑮ 1/4-20 Screw Hole
- Receiver (B) Interfaces:
- ① RP-SMA Antenna Male Interface
- ② RS485/RS422 Interface
- ③ LAN Interface
- ④ HDM Output
- ⑤ SDI Output
- ⑥ DC Power Input
- ⑦ TFT Display
- ⑧ UP Button
- ⑨ MENU Button
- ⑩ DOWN Button
- ⑪ USB Interface
- ⑫ DC Power Switch
- ⑬ 3/8-16 Screw Hole
- ⑭ 1/4-20 Screw Hole
INSTALLATION (TRANSMITTER)
Diagram shows the installation steps for the transmitter:- 1. Antennas are attached to the transmitter.
- 2. A magic arm is attached to the 1/4 screw hole at the bottom of the transmitter.
- 3. Batteries (compatible with NP-F970, U60, or similar) are inserted.
- 4. The device is turned on by pressing the power switch to 'ON'.
INSTALLATION (RECEIVER)
Diagram shows the installation steps for the receiver:- 5. Antennas are attached to the receiver.
- 6. The receiver is mounted on a bracket via the 1/4 screw hole at its bottom.
- 7. Batteries (compatible with V-mount or G-mount large capacity batteries) are installed.
- 8. The device is turned on by pressing the power switch to 'ON'. The power indicator will show a blue light.
OLED DISPLAY
Diagrams A (Transmitter) and B (Receiver) illustrate the OLED display interfaces.- Transmitter (A) Display Elements:
- ① Signal Strength
- ② Scene Mode
- ③ Device ID
- ④ Device SSID
- ⑤ Power Supply Voltage
- ⑥ Video Format
- ⑦ Channel Display
- Receiver (B) Display Elements:
- ① Channel Display
- ② Signal Strength
- ③ Device SSID
- ④ Power Supply Voltage
- ⑤ Device ID
- ⑥ Video Format
NOTE: A low power warning is triggered when battery power is too low, indicated by a blinking battery icon.
QUICK GUIDE
ENTER MENU
Long press the MENU button of the transmitter and receiver to enter the main menu.
CHANNEL CHANGE
Press the “UP” or “DOWN” button on the receiver to switch to another channel, press the "MENU" button to confirm the channel, and the transmitter channel will be automatically switched.
RS485/RS422 INTERFACE USE METHOD
RS485 CONNECTION
Diagram shows RS485 connection. It includes a pinout table for RS485/RS422 (485-, 485+, GND, T-, T+) and a connection to a device (e.g., camera controller) with a corresponding RS485 port.RS422 CONNECTION
Diagram shows RS422 connection. It includes a pinout table for RS422/RS485 (485-, 485+, GND, T-, T+) and a connection to a device (e.g., camera controller) with a corresponding RS422/RS485 port (labeled 1-9).- 1. Connect the transmitter and the receiver with the RS485/RS422 signal cable.
- 2. As demonstrated above, connect the transmitter with the terminal device and connect the receiver with the switcher. The line sequence shall correspond to the colors.
- 3. Select the corresponding baud rate on both the transmitter and the receiver (path: menu-system setting-serial port setting).
- 4. The terminal equipment connected with the transmitter can be controlled by the lever arm on the switcher.
TALLY CONTROL USE METHODS
Diagram shows TALLY control setup. TALLY lights connect to the TALLY OUT interface on the transmitter. A USB Type-A interface on the receiver connects to a TALLY box, which then connects to the switcher via a D-Sub Female 25 signal cable. TALLY lights are controlled by switches on the switcher.LAN INTERFACE USE METHOD
Diagram shows LAN interface setup. The transmitter's LAN interface connects to an IP camera via a network cable. The receiver can pull the stream through its LAN interface.- Details: Port number: 5554, account/password: sub/12345678. Example RTSP URL: rtsp://192.168.218.211:5554/sub/123456.
- NOTE: The device IP is in the 192.168.218.X network segment.
PARAMETERS
| Parameter | Transmitter | Receiver |
|---|---|---|
| Interface | SDI Input (BNC Female) HDMI Input (Type A Female) 3.5mm TALLY Output Antenna Interface*4 (RP-SMA Male) DC Power Input USB Type-C LAN RS485/RS422 |
SDI Output (BNC Female) *4 HDMI Output (Type A Female) *4 Antenna Interface*4 (RP-SMA Male) DC Power Input USB Type-A LAN RS485/RS422 |
| Supply Power Range | 7~36V DC | 18~36V DC |
| Power Consumption | <12W | <32W |
| Weight | 431.5g (External Antenna Excluded) | 1621g (External Antenna Excluded) |
| Dimension | (LxWxH:88x30x144mm External Antenna and Battery Plate Excluded) | (LxWxH:148x62x242mm External Antenna and Battery Plate Excluded) |
| Input/Output Video Format | HDMI: 480P60 Hz 576P50 Hz 720P50/60 Hz 1080i50/60 Hz 1080P24/25/30/50/60 Hz SDI: 720P50/60 Hz 1080i50/60 Hz 1080P24/25/30/50/60 Hz |
HDMI: 480P60 Hz 576P50 Hz 720P50/60 Hz 1080i50/60 Hz 1080P24/25/30/50/60 Hz SDI: 720P50/60 Hz 1080i50/60 Hz 1080P24/25/30/50/60 Hz |
| Frequency | 5.1~5.9GHz | 5.1~5.9GHz |
| Transmission Power | MAX 22dBm | MAX 22dBm |
| Receiver Sensitivity | -90dBm | -90dBm |
| Lowest Transmission Latency | <0.1s | <0.1s |
| Bandwidth | 40MHz | 40MHz |
SUPPORT
If you encounter any problems in using the product or need any help, please follow these ways to get more technical support:
- ? Hollyland Products User Group
- ? Hollyland Tech
- ▶️ Hollyland Tech
- ✉️ support@hollyland-tech.com
- ? www.hollyland-tech.com
