The test setup used to test a graphics card for DVI Compliance.
Since the DVI standard specifies exactly how the receiver is supposed to process the transmitted data, the performance of a DVI transmitter (graphics card) can easily be tested. Silicon Image has developed a DVI Compliance Test Kit for this exact purpose. The card is connected to a test board that possesses a CRU (clock recovery unit), which is used to simulate an optimal receiver. The data is then evaluated using a Tektronix TDS7404 oscilloscope. Tektronix' TDSDVI software automatically records the eye diagram, including the appropriate limits.
The Tektronix software allows a very detailed analysis of the eye diagram.
This photo is from a TFT displaying a perfect image.
In this case, there's too much jitter in the signal. Don't blame your TFT if you see such a signal. In most cases the reason for this bad quality is the graphics card or a too long cable.
- DVI 101
- The Monitor Connection
- The DVI 1.0 Standard
- The TMDS Transmitter
- Digital Display Basics
- Pixel Frequency
- DVI Dual Link
- DVI Connector Types
- DVI Quality Of Graphics Cards
- DVI Compliance
- DVI Compliance Tests, Continued
- DVI Jitter Management
- Causes For Jitter With DVI
- DVI Transmitter Compliance Test
- Graphics Card Comparison: DVI Compliance Test
- ABIT RX600PRO-256
- ATI Radeon X800 XT PE
- MSI FX-5700 Ultra-TD128 (MS8938)
- MSI FX5950 Ultra-VTD256 (MS8946)
- MSI NX6800 Ultra-T2D256