DH7508 LED Receiving Card
Cost-effective general-purpose LED receiver card with 8× HUB75E connectors, 256×256@60Hz loading, pixel-level brightness and chroma calibration, and quick calibration upload — supplied by Excelled, a trusted LED screen manufacturer for global B2B system integrators.
Quick Answer: What Is the DH7508 LED Receiving Card?
The NovaStar DH7508 LED receiving card is a cost-effective LED receiving card for LED display cabinets. It loads up to 256×256 pixels at 60Hz through 8 HUB75E connectors, supports pixel-level brightness and chroma calibration with quick calibration upload, and keeps the screen running with loop backup — all configured in NovaLCT, suitable for on-site LED display applications.
What Is the NovaStar DH7508 LED Receiving Card?
The DH7508 receiver card is NovaStar’s cost-effective LED receiving card built on 8 standard HUB75E connectors, supporting up to 16 groups of parallel RGB data. With 8bit video sources, a single card loads up to 256×256 pixels at 60Hz — the standard capacity for one LED cabinet on high-scan modules. Thanks to its EMC-compliant hardware design, the card improves electromagnetic compatibility and suits various on-site setups.
What separates the DH7508 from ordinary LED receiver cards is value: it keeps NovaStar’s calibration and redundancy toolchain at a budget-friendly price. Pixel-level brightness and chroma calibration removes brightness and chroma differences between pixels, the quick adjustment of dark or bright lines fixes module and cabinet splicing seams instantly, and the 3D function (with a 3D-capable sending card) loads 192×256 pixels with PWM driver ICs or 176×256 with common driver ICs. Reliability is not compromised: loop backup over dual Gigabit Ethernet, dual program backup and dual configuration parameter backup keep the screen running, backed by RoHS and EMC Class A certification for noisy on-site environments.
Maintenance stays simple. Mapping shows the receiving card number and Ethernet port information on the cabinets themselves, temperature and voltage are monitored without extra hardware, the cabinet LCD displays run time, and Ethernet bit errors are counted in NovaLCT. Firmware and configuration parameters can be read back and saved locally for offline archival, and a pre-stored image keeps a custom logo on screen during startup or when the Ethernet cable is disconnected.
Pixel Capacity
Max 256×256@60Hz per card via 8× HUB75E and 16 groups of parallel RGB data.
HUB75E Ports
8 standard connectors give stable communication and simple wiring to the hub board.
Compact Size
95.5×109.1mm footprint fits narrow and compact cabinets where full-size cards cannot.
Calibration Upload
Calibration coefficients upload to the card quickly, cutting re-calibration time after module swaps.
DH7508 LED Receiving Card Specifications — Electrical, Physical & Environmental
All values sourced from the official DH7508 Specifications V1.0.3 document — the DH7508 Receiving Card Specifications V1.0.3 — published by NovaStar. Measurements taken under standard operating conditions with DC 3.3V–5.5V input.
| Parameter | Specification |
|---|---|
| Product Type | Cost-effective LED receiving card — 8 standard HUB75E connectors, up to 16 groups of parallel RGB data |
| Max Resolution | 256×256@60Hz, 8bit video source |
| 3D Loading | 192×256 pixels (PWM IC) · 176×256 pixels (common IC) — with 3D-capable sending card |
| Calibration | Pixel-level brightness & chroma calibration — works with NovaStar’s high-precision calibration system |
| Image Adjustment | Quick adjustment of dark or bright lines — easy, takes effect immediately |
| Calibration Upload | Quick uploading of calibration coefficients to the receiving card — improves efficiency greatly |
| Mapping | Cabinets display receiving card number and Ethernet port information for easy topology checks |
| Pre-Stored Image | Customizable image for startup, Ethernet cable disconnection or no video signal |
| Monitoring | Temperature + voltage monitoring without peripherals · cabinet LCD (temperature, voltage, run time) · bit error detection (NovaLCT V5.2.0+) |
| Readback | Firmware program readback + configuration parameter readback, saved locally (NovaLCT V5.2.0+) |
| Redundancy | Loop backup (dual Gigabit Ethernet loop) · dual program backup · dual configuration parameter backup |
| Indicators | Running (green): 1s normal / 3s Ethernet abnormal / 3×0.5s no video source / 0.2s backup program / 8×0.5s loop switchover · Power (red) always on |
| Ethernet Ports | 2× Gigabit Ethernet (RJ45) — each can serve as input or output for cascading |
| Input Voltage | DC 3.3V–5.5V · Rated current: 0.5A |
| Rated Power | 2.5W |
| Dimensions (L×W×H) | 95.5 × 109.1 × 18.4 mm (board thickness ≤2.0mm, total thickness ≤19.0mm; mounting holes GND-enabled) |
| Net Weight | 72.4 g |
| Operating Environment | −20°C to +70°C · 10%–90% RH (non-condensing) |
| Storage Environment | −25°C to +125°C · 0%–95% RH (non-condensing) |
| Packing | Blister pack per card · 100 cards per box · Box: 650×500×200mm |
| Certifications | RoHS · EMC Class A |
| Software | NovaLCT (Windows V5.2.0+) — detection, mapping, calibration, bit error monitoring, readback |
Why Choose the DH7508 LED Receiving Card — Compact Size & Cost-Effective Price
Most 8-port LED receiving cards share one bulky footprint. The DH7508 packs its 8 HUB75E connectors and 16 groups of parallel RGB data onto a 95.5×109.1mm board — small enough for narrow and compact cabinets where full-size cards will not fit.
DH7508 Maximum Resolution — 256×256@60Hz on 8 HUB75E Connectors
With 8 standard HUB75E connectors and up to 16 groups of parallel RGB data, the DH7508 loads 256×256 pixels at 60Hz from 8bit video sources — the standard capacity for one LED cabinet on high-scan modules. In 3D mode with a 3D-capable sending card, loading drops to 192×256 pixels with PWM driver ICs or 176×256 pixels with common driver ICs.
DH7508 Compact 95.5×109.1mm Footprint — Fits Narrow Cabinets
The DH7508’s board is noticeably smaller than NovaStar’s 12-port and 16-port models, yet it keeps every reliability feature. The DH7508 features GND-enabled mounting holes for better grounding in EMC-sensitive sites, and at just 72.4g the card ships economically in bulk quantities. It consumes only 2.5W, so it adds almost nothing to the cabinet power budget.
DH7508 Cost-Effective Price — Full NovaStar Quality for Less
The DH7508 is NovaStar’s budget-friendly pick, but budget does not mean stripped. Pixel-level calibration, loop backup, dual program backup, dual configuration parameter backup and EMC Class A compliance all stay on the card. You simply pay for 8 ports instead of 12 or 16.
How to Install, Wire & Replace the DH7508 LED Receiving Card
The DH7508 HUB75E connectors mount the card onto the LED module hub board — 8 standard 16-pin headers, each carrying 2 groups of parallel RGB data (R1/G1/B1 and R2/G2/B2), five line decoding signals (HA/HB/HC/HD/HE), latch (HLAT), output enable (HOE), and shift clock (HDCLK) — the extra E address line enables 1/32 scan support.
DH7508 HUB75E Pin Definition (JH1 Reference)
| Pin | Signal | Pin | Signal | Description |
|---|---|---|---|---|
| 1 | R1 (Red data 1) | 2 | G1 (Green data 1) | RGB data group 1 |
| 3 | B1 (Blue data 1) | 4 | GND (Ground) | Ground reference |
| 5 | R2 (Red data 2) | 6 | G2 (Green data 2) | RGB data group 2 |
| 7 | B2 (Blue data 2) | 8 | HE1 (Line decode E) | E address line — enables 1/32 scan |
| 9 | HA1 (Line decode A) | 10 | HB1 (Line decode B) | Row/line addressing signals |
| 11 | HC1 (Line decode C) | 12 | HD1 (Line decode D) | Row/line addressing signals |
| 13 | HDCLK1 (Shift Clock) | 14 | HLAT1 (Latch) | DCLK shifts data through registers; LAT latches data to output |
| 15 | HOE1 (Output Enable) | 16 | GND (Ground) | OE controls LED output state |
DH7508 Installation Checklist
- Power off the cabinet before inserting or removing the receiving card — hot-swap is not supported.
- Align HUB75E pin 1 on both card and hub board — pin 1 is marked with a triangle/notch on the connector silkscreen.
- Connect DC input (3.3V–5.5V) — the card draws only 0.5A (2.5W), a negligible load on the cabinet power budget.
- Connect Ethernet in loop topology — main and backup lines form a closed loop between sending card and receiving card chain; if one line faults, the screen keeps displaying.
- Use the GND-enabled mounting holes — they strengthen grounding in EMC-sensitive installations.
- Verify indicator status — green flashing once every 1s = normal with video source; red always on = power OK.
How to Configure the DH7508 LED Receiving Card in NovaLCT — Calibration & Readback
The DH7508 is configured entirely through NovaLCT (NovaStar LED Configuration Tool, Windows V5.2.0 or later). Download it from the NovaStar official website; the same tool handles screen mapping, calibration upload, firmware updates, bit error monitoring and readback for the whole NovaStar receiving card family. Pair the card with sending devices such as the MCTRL660 LED display controller or the VX1000 all-in-one LED display controller. Both firmware and configuration parameters can be read back and saved locally, giving you a complete offline archive of every card on the wall.
DH7508 NovaLCT Workflows
| Workflow | What It Does | Typical Use |
|---|---|---|
| Mapping | Cabinets display receiving card number and Ethernet port information — connection topology is visible on the wall itself | Locating a faulty card in a large wall without opening any cabinet |
| Quick Calibration Upload | Brightness and chroma calibration coefficients are uploaded to the card quickly via NovaCLB | Fast re-calibration after module replacement — restoring seamless uniformity |
| Firmware Update & Readback | Flash new firmware, or read the program back and save it locally; dual program backup prevents bricking (NovaLCT V5.2.0+) | Batch firmware upgrades across a fleet; archiving a working version before changes |
| Bit Error Detection | Real-time per-port error counting on Gigabit Ethernet links (NovaLCT V5.2.0+) | Finding a degrading RJ45 cable before it fails on show day |
| Pre-Stored Image | Custom startup / no-signal / cable-disconnected image stored on the card | Branded standby screen instead of black wall during maintenance |
| Temperature & Voltage | Card temperature and voltage visible in NovaLCT and on the cabinet LCD, no external hardware | Preventive maintenance on outdoor walls in hot climates |
DH7508 Datasheet, Manual & Downloads
- DH7508 Manual / DH7508 Datasheet (PDF): DH7508 Receiving Card Specifications V1.0.3 — dimensions, pin definitions, indicators and environmental limits, available from the official NovaStar download center.
- DH7508 Download — NovaLCT Software: NovaLCT V5.2.0 or later for Windows — detection, mapping, calibration, firmware update and readback, from the official NovaStar download center.
- DH7508 Price & Quotation: wholesale B2B pricing depends on quantity and destination — use the contact page to request a quotation.
DH7508 vs DH7512 vs DH7516 — Which NovaStar Receiving Card to Choose?
NovaStar’s receiving card lineup splits by port count, pixel capacity and price. Use this comparison to match the card to your cabinet density and project budget. All three cards share the same loop backup and dual program backup architecture, so reliability is never the trade-off on the DH7508.
| Feature | DH7508 ★ | DH7512 | DH7516 |
|---|---|---|---|
| HUB75E Ports | 8× | 12× | 16× |
| Parallel RGB Groups | Up to 16 | Up to 24 | Up to 32 |
| Max Resolution | 256×256@60Hz | 512×512 | 512×384@60Hz (PWM IC) |
| 3D Support | ✓ | ✓ | ✓ |
| Pixel Brightness & Chroma Calibration | ✓ | ✓ | Brightness only |
| Color Management | ✗ | ✓ | ✗ |
| 18bit+ Grayscale | ✗ | ✓ | ✗ |
| RGB Independent Gamma | ✗ | ✓ | ✓ |
| Quick Calibration Upload | ✓ | ✗ | ✗ |
| 90° Image Rotation | ✗ | ✓ | ✗ |
| Pre-Stored Image | ✓ | ✓ | ✗ |
| Loop Backup | ✓ | ✓ | ✓ |
| Dual Program Backup | ✓ | ✓ | ✓ |
| Dual Config Backup | ✓ | ✓ | ✗ |
| PCB Dimensions | 95.5×109.1mm | 145.7×91.5mm | 145.6×91.5mm |
| Net Weight | 72.4g | 93.1g | 100.1g |
| Best For | Compact 8-port cabinets, budget projects | 12-port cabinets with high image quality | 16-port cabinets with large loading |
DH7508 LED Receiving Card FAQ — Troubleshooting & Common Questions
Q1 Green indicator flashing every 3 seconds — no display?
Diagnosis: The receiving card is powered and functioning, but the Ethernet cable connection is abnormal. Solution: Check the RJ45 cable between the sending card and this card. Verify the connector is fully seated on both ends. If loop backup is used, inspect both the main and backup lines — one may carry signal while the other is faulty.
Q2 Green indicator flashing every 0.2 seconds — program loading failed?
Diagnosis: The application program failed to load, and the card is now running on the backup program. Solution: The dual program backup has kicked in, so the card is still operational. Re-flash the primary firmware via NovaLCT V5.2.0 or later. If it recurs, verify the firmware package and use firmware readback to confirm the backup copy is intact.
Q3 Green indicator flashing 8 times every 0.5 seconds?
Diagnosis: A redundancy switchover occurred on the Ethernet port, and the loop backup has taken effect. Solution: The screen keeps displaying normally, so no immediate action is needed. Locate the failed cable or connector on the disconnected segment and replace it to restore full redundancy before the next show. Check both ends of the loop wiring.
Q4 What is the maximum resolution of the DH7508?
Diagnosis: A single card loads up to 256×256 pixels at 60Hz through its 8 HUB75E connectors. Solution: In 3D mode, loading drops to 192×256 pixels with PWM driver ICs or 176×256 with common driver ICs. Plan the screen map so no card exceeds these limits, and confirm the actual load in NovaLCT.
Q5 Why isn’t NovaLCT detecting my DH7508 receiving card?
Diagnosis: Usually a network-layer issue rather than a card fault. Solution: Confirm you run NovaLCT V5.2.0 or later on Windows, the PC is on the same subnet as the controller, and no firewall blocks the discovery port. Check the running indicator: flashing once per second means the card is healthy and reachable; any other pattern points to cabling instead.
Q6 Is the DH7508 compatible with my old receiving card?
Diagnosis: Compatibility depends on the cabinet’s HUB connector layout. Solution: The DH7508 mounts on cabinets with 8 HUB75E connectors. Verify the connector count, pin order and mounting holes before batch replacement. Mixing card models in one screen is possible, but the replaced cabinets must be recalibrated and remapped in NovaLCT.
Q7 How many DH7508 cards does my LED wall need?
Diagnosis: Divide your wall’s pixel dimensions by the card’s 256-pixel capacity. Solution: Example: a 1920×1080 wall needs 8 cards across (1920 divided by 256, rounded up) and 5 cards down — 40 cards total. Practical loading also depends on each cabinet’s scan rate and HUB layout, so send us your module size for an exact count.
Q8 What is the DH7508 price for wholesale orders?
Diagnosis: NovaStar publishes no fixed retail price; genuine DH7508 pricing depends on quantity, packing and destination. Solution: Excelled supplies the DH7508 on wholesale B2B terms with individual blister packing, 100 cards per box. Request a quotation through our contact page with your quantity and destination to receive volume pricing.
Q9 Where can I find the DH7508 manual and firmware?
Diagnosis: The official reference document is the DH7508 Receiving Card Specifications V1.0.3; firmware and NovaLCT are distributed through NovaStar’s official channels. Solution: Read the V1.0.3 document for connector pin definitions, dimensions, indicators and environmental limits. Update firmware only through NovaLCT V5.2.0 or later — dual program backup makes an interrupted update recoverable.
Q10 How do I choose between the DH7508, DH7512 and DH7516?
Diagnosis: The three cards share the same loop backup and dual program backup architecture; they differ in port count, pixel capacity and price. Solution: Choose the DH7508 for 8-port cabinets and compact enclosures, the DH7512 for 12-port cabinets with higher image quality, and the DH7516 for 16-port cabinets with large loading. Send us your cabinet size for a verified recommendation.
Is the DH7508 LED Receiving Card Right for Your LED Wall?
The NovaStar DH7508 delivers 256×256@60Hz loading over 8 HUB75E connectors, with pixel-level brightness and chroma calibration, quick calibration upload, loop backup and dual program backup in a compact 95.5×109.1mm form factor — at NovaStar’s most budget-friendly price. For 8-port cabinets, compact enclosures and cost-sensitive projects, the DH7508 is the value pick of the receiving card lineup.
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