== 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 [[http://www.wenzel.com|Wenzel Inc.]], with the specs contained in [[attachment:9112501.pdf|this data sheet]].

According to [[attachment:DesignOfTheMultiplier.pdf|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 [[attachment:A2CP2596.pdf|A2CP2596]] by [[http://www.cougarcorp.com|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.