Stober, J., Franke, T., Grünwald, G., Leuterer, F., Manini, A., Monaco, F., Münich, M., Neu, R., Schütz, H., Wagner, D., Zohm, H., Gantenbein, G., Heidinger, R., Meier, A., Thumm, M., Kasparek, W., Lechte, C., Chirkov, A. V., Denisov, G. G., Litvak, A., Malygin, S. A., Myasnikov, V. E., Nichiporenko, V. O., Popov, L. G., Solyanova, E. A., Tai, E. M., Meo, F., & Woskov, P. (2008). On the way to a multi-frequency ECRH system for ASDEX Upgrade. Talk presented at 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC-15). Yosemite National Park, CA. 2008-03-09 - 2008-03-13.