The PD-100i is a high speed pulse signal distribution amplifier that provides distribution for pulse and RF signals with a frequency range of 1-100 MHz. The first module receives a pulse signal and supplies six buffered outputs designed to drive low impedance loads and long 50 or 75 ohm cables. The outputs provide a 3.8 volt peak-to-peak signal into a 50 ohm load. The channel-to-channel delay differences are less than 200ps. The distribution module has the low temperature coefficient of propagation delay that is essential for the distribution of high quality timing signals. The second module of the instrument receives a 1-100 MHz RF signals and provides six buffered square wave outputs. The typical cross-channel isolation on the RF distribution modules is 100 dB and reverse isolation is typically greater than 110 dB. The phase noise of the modules is exceptionally low, typically -148 dBc/Hz @ Fourier frequency of 1 Hz and -170 dBc/Hz @ Fourier frequencies greater than 10 kHz. All outputs are DC coupled and conform to TTL specifications. The PD-100i is designed to be powered by a 100 to 240 VAC mains source or by a +12 to +36 VDC power source. The DC power may be used as a main power source for the instrument or in conjunction with the AC power as a backup power supply in case of loss of the main AC power. . The transition from AC to DC supply operation is done by a Schottky diode network and charge storage capacitors to prevent any glitches and guarantee seamless continuous operation. The PD-100i is housed in a 1U high, 19" rack-mount enclosure.