Designed to replace the crystal oscillator LO chain in a DB6NT 10GHz Transverter unit or your own
Transverter design, the Model 2556-ALN will provide superior low noise performance almost equaling
the Phase Noise performance of a crystal oscillator multiplier chain.
Now there is an alternative to the unstable crystal oscillator chain that drifts constantly.
The Model 2556-ALN allows precise receiver/transmitter frequency control using a stable external 10
MHz or 100 MHz reference oscillator like a TCXO, Oven Controlled Oscillator or a Rubidium Oscillator. The
Model 2556-ALN may used to replace any Local Oscillator chain by providing an external X4 multiplier
ahead of any 10GHz mixer assembly. Interface to a DB6NT 10GHz Transverter would be through the
last X4 multiplier stage.
This application note shows how easy it is to implement.
(Caution - an 10 to 12 dB attenuator will be required to interface to your DB6NT Transverter.)
The Model 2556-ALN outputs a single ultra low noise 2556 MHz signal. With a minimum of +17 dBm of output
power, the oscillator is perfect for driving 3-dB power spliiters, multipliers and power
amplifier stages. The ultra low noise performance of the Model 2556-ALN begins to approach crystal
oscillator phase noise performance. This allows the unit to be used for such things as
EME communications, long-haul low noise communications and digital operations like JT65 and similar
modes. With both end of a communications link using a Model 2556-ALN, both stations will be absolutly
on the same frequency when locked to a 10 MHz GPS disiplined oscillator reference. No more hunting
around the dial for the other operator.
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