I need to modulate DC Signal from Standard Bench Power Supply with a 1Vpp 1KHz sinusoidal signal. I have an 33210A signal generator with standard bench supply. DC offset provided by signal generator is not enough. I like to add about 24-30 V of DC offset. When I connect signal generator in-series with power supply, the signal generator goes in over-voltage mode. Is there a way to add additional DC offset using this signal generator?