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, Four Bias Mode BCB-4 Optilab In Stock $1,195.00 Single Polarization IQ Automatic Bias Controller MBC-IQ-03 Plug Tech HK 2-3 Weeks $2,650.00