5x Frequency Multiplier
In the Upgraded 40 Meter the 55MHz modulation necessary to generate the second sideband, will be obtained from the first modulation f1=11MHz by means of a 5-time frequency multiplier.
We are going to use a Low Noise Odd-Order Multiplier (LNOM) by Wenzel Inc., with the specs contained in this data sheet.
According to our requirements an output level of +36-40 dBm will be needed to drive the EOM.
The LNOM from Wenzel can output only +20 dBm, thus a high power, low noise amplifier will have to be added. This A2CP2596 by Teledyne Cougar Corp. seems to be a good candidate.
The 20 dBm step from the frequency multiplier and the EOM can be in part achieved by the new EOM_driver that Kiwamu is working on.
Defining the requirements for the Frequency Multiplier
Sometime, Alberto will write here how he came up with the requirements of the specs above. He'll describe his Optickle model showing the results of his simulations.