The PD-110i is a high speed sine-to-square wave converter and distribution amplifier for RF signals with a frequency range of 1 to 100 MHz. The instrument accepts a 1-100 MHz signal and provides twelve buffered square wave outputs. All outputs are DC coupled and conform to TTL specifications. The typical cross-channel isolation on the RF distribution modules is 100 dB and the 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 –169 dBc/Hz @ Fourier frequencies greater than 10 kHz. The PD-110i is housed in a 1U high 19" rack-mount enclosure, and supports AC or DC power operation.