2, 3 or 4-Channel Splicing with Auto-Calculated Parameters

Splicing is where the LVP909 earns its place in a large-wall design. The unit supports 2-channel, 3-channel and 4-channel splicing output, and it auto-calculates the splicing parameters rather than asking the installer to work out the maths by hand. You tell it the total width and height of the mosaic LED screen plus the size and position each output port controls; the processor then derives the matching input and output parameters for that port.

The Documented Split Modes

The vendor’s split-mode diagram documents three arrangements. Using the vendor’s own canvas labels: split mode 1 is a 1×2 mosaic labelled up to “≤4K”-wide, split mode 2 is a 1×3 mosaic labelled up to “≤8K”-wide, and split mode 3 is a vertical stacking arrangement labelled up to “≤4K”. Those labels describe the combined canvas width the mosaic can address; they are not the resolution of a single output. All four DVI outputs support 1920×1200@60Hz, and that per-port figure is what governs the sending-card plan. The configuration also supports free size and position setup of PIP images and one-key switching between different mosaic modes, with a maximal 4-unit screen mosaic for builds that outgrow a single chassis.

1. Select the display mode — press the M1–M4 display mode buttons to pick the mosaic mode you are configuring.
2. Select the output port — press Out1, Out2, Out3 or Out4 to choose which port’s parameters you are about to set.
3. Enter the total LED screen size — the overall width and height of the finished mosaic wall.
4. Describe the port’s share — set the LED screen size that this port controls and its position relative to the whole screen.
5. Run Auto Calculation — the LVP909 calculates this port’s output and input parameters from those entries.
6. Fine-tune and repeat — nudge the auto parameters against the actual output image if a panel-perfect seam is needed, then repeat for the remaining ports.

Auto calculation is not a shortcut around precision — it is the reason a multi-port mosaic is practical on site. Manually deriving the intercept window and output start coordinates for each of four ports invites seam errors that only show up once the wall is built; letting the processor compute them from the total screen size and per-port share keeps the geometry consistent across every port. For walls that need a different splicing toolset, the Mooncell V-series video splicer and the VX1000 all-in-one controller take other approaches to the same job.

Seamless, Fade and Wipe Switching with Preselect + Take

The LVP909 gives you seamless switching, fade in fade out switching and wipe switching between any inputs, and the switching effect and time are selected from the front panel with the C/F button. Two switching workflows are documented, and they suit different operators.

One-key switching is the default: pressing an input selection button cuts straight to that source, with the switch time configured in the setup menu. Preselect + Take separates the decision from the action — you press an input button to preselect that signal, the LCD shows the preselect signal and its status once the signal is steady, and only when you press the Take button does the output move from the current input to the preselect signal. In that mode the indicator flashes quickly when the preselected source has a valid signal and very slowly when it does not, so a dead source is visible before it ever reaches the wall.

Switching also extends to the stored configurations themselves: multiple pre-stored mode calls are supported, and the transition between modes can itself run as a seamless switch or a fade in fade out switch. That is what lets an operator move from a single full-screen image to a 3-channel mosaic mid-event without a blank frame.

The LCD status screen reports the working state throughout: current input and its format, preselect input and its status, output position and size, switch mode, switch time and the active application mode. Our LED video splicer guide covers how switching behaviour differs across splicer and processor classes if you are still choosing a category.

VDWall LVP909 vs LVP615S vs LVP605: Which One Fits?

Three VDWall processors, three different balances of inputs, outputs and power. The specs below are taken from the published VDWall documentation for each model.

Read the table by output count first. If your wall plan needs more than two channels of splicing, or four images on screen at once, the LVP909 is the only one of the three with the output ports to do it. If the build is a straightforward single or dual-screen install with an SDI loop for a confidence monitor, the LVP615S carries the extra input variety including YPbPr, DisplayPort and a second VGA. Where a small legacy-source rack with S-Video, EXT and three composite inputs is the requirement, the LVP605 fits the bill at the lowest power draw of the three.

Model pages: VDWall LVP615S LED HD video processor · VDWall LVP605 LED video processor · VDWall LVP100 compact LED video processor. Send the wall dimensions and source list and our engineers map the chain, the sending-card plan and the quote in one reply.

VDWall LVP909 Manual, Datasheet and Control Software

Two official VDWall documents sit behind everything on this page, and both are worth having before you specify the unit. The “Overview of LVP909” (V1.2) is the short form: the feature list and the specification table covering inputs, outputs, formats, connectors, power, environment, dimensions and weight. The “LVP909 User Manual” is the working document: the item list and standard accessories, the rear-panel port descriptions, the front-panel button reference, the six application modes with their signal-routing diagrams, the basic user instructions for signal switching, and the full setup menu reference.

If you need either document, request the LVP909 datasheet and manual through our sales team — we send the vendor PDFs together with the quote for your configuration, so the specification you design to is the specification that ships.

What the Manual Covers in Detail

The user manual walks the whole commissioning path rather than just the spec sheet. It opens with the six application modes — AppM1 (switcher), AppM2 (2 mosaic), AppM3 (3 mosaic), AppM4 (4 mosaic), AppM5 (4 image) and AppM6 (3 image) — each with its own signal-routing diagram showing exactly which output ports are live in that mode. From there it documents the four setup menu sections you will actually use on site: 1. Output CFG (output resolution and application mode), 2. Output Image (the mosaic parameter table including Auto Calculation), 3. Image Source, 4. Color & Brightness (brightness, contrast and colour, each 0–100 with a default of 50), 5. Communication (IP, mask, gateway, MAC and Device ID), 6. Language (Chinese and English) and 8. Advance. The manual also carries the RS232 cable order drawing, which matters because that cable is an order-time item rather than a stock accessory.

Control Software: PC Program, Device ID and Multi-Unit Addressing

Day-to-day control is split between the front panel and the network. The LVP909 is listed as a Panel / RS232 / USB / LAN / WiFi controlled unit, and the manual documents a PC control program that reaches the processor either through the rear RS232 IN port or over Ethernet. What makes multi-unit racks manageable is the Communication menu (section 5): alongside IP address, subnet mask, gateway and MAC it exposes a Device (ID) field, which exists to number the multiple LVP909 units sitting under the same IP — so one PC can address each processor in the rack individually instead of having to be re-plugged. Combined with the RS232 IN / RS232 LOOP pair, that gives you both network addressing and a serial chain for the same rack.

Commissioning behaviour is documented too: changes made in the Output CFG menu are applied through item 1.3 Setup, and the unit prompts you to restart before the new parameters take effect — a step worth knowing before you conclude that a setting “did not work”. If you would rather have us walk the configuration for your wall, send the wall size and source list to our engineers and we will map the application mode, port assignment and cabling on paper before you build.