BCB (Modulator Bias Control Board) Sort by: SKU Product Price Default Product Part No. Vendor Availability Price Dual Polarization IQ Automatic Bias Controller MBC-DPIQ-02 Plug Tech HK 2-3 Weeks $2,950.00 Modulator Bias Control Board, Five Bias Mode BCB-4 Optilab In Stock $1,195.00 Single Polarization IQ Automatic Bias Controller MBC-IQ-03A Plug Tech HK 2-3 Weeks $2,650.00 Ultra Compact Dither Free Modulator Bias Controller MBC-HF-01 Plug Tech HK Please Call $1,380.00