QMOD-HD HDTV Modulator

Installation

Component Video

• Connect RCA Component cable between units
• Set QMOD to Component
• Connect audio between optical, coax, or stereo ports
• Set up QMOD-HD parameters on front panel

• Connect RCA (or BNC) to HD15 cable to RGB input (RGB pins pass through to Component)
• Set QMOD to Component
• Connect audio between optical, coax, or stereo ports
• Set up QMOD-HD parameters on front panel

VGA (RGBHV) Integration

• Connect VGA output to HD Scaler
• Set Scaler output to 720p/1080i, 59.94 Hz
• Connect Scaler output to RGB input of QMOD-HD. Note that PC 1280 x720 is not the same as 720p, HD standards are different from VGA standards. In addition, most displays overscan video, so a scaler can help add a safe area by underscanning. Typical scalers for this applicaton is and the TV One 1T-C2-400 (the IRC-5 IR remote saves setup time) and Extron DVS-304 (ask for beta 59.94 firmware)
• Set QMOD to RGBHV
• Connect audio between optical, coax, or stereo ports
• Set up QMOD-HD parameters on front panel
• Adjust Scaler to format, position, and over/underscan PC video for best image on displays

AV Wiring

• Video: Connect Composite Video to Video input of QMOD-HD
• S-Video: Connect C output of S-Video to Pb input, Y output to Composite
• Set QMOD to Video or S-Video
• Connect audio between optical, coax, or stereo ports
• Set up QMOD-HD parameters on front panel

RF Level

You should use digital RF meter to measure the RF levels, so you can balance outputs when you combine, and at the TVs when needed.

However, if you only have an analog meter, you can set the QMOD to CW (Continuous Wave). You can measure that with your metere, then set back to QAM 256 for TV reception. The QMOD channels should ba about 6 dB down from the analog channels.

RS-232 Port Wiring

All drawings show pin numbers relative to a PC COM port or typical control system RS-232 ports.

Up to nine tuners can be daisy-chained from one RS-232 control port. Remember that you will need to use the Unit# address in your programming when you control more than one tuner from the same control port.

Set the first unit in the RS-232 chain to the highest Unit#, then wire in sequence to the last tuner in the chain. The reason for this is that CR tuners use an intelligent data bus - the highest number tuner receives all commands, and then passes on commands addressed to tuners with lower unit numbers. The next tuner in the chain does the same, and so on until the last unit.

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