Pulse, frequency reference, distribution amplifiers three, six, ten and twenty channel 10 MHz frequency reference amplifiers. Mix linear 10 MHz and PPS distribution amplifiers in the same 1 ru chassis. Minimal phase noise contribution signal level monitoring quickly alert to a signal loss or a disconnected cable. Fault and transient protected assure reliability .Lock-in amplifiers restore an existing reference or create a new locked frequency. DC (-60 to +60 VDC) or global AC power (redundant power options available). Excellent noise immunity and low phase noise options. Pulse Distribution Amplifiers for PPS or square wave frequency reference distribution. Excellent channel skewing typically less than 1 ns.