1296 / 144 MHz downconverter

My friend asked me to build this simple downconverter. The goal of this project that he can listen the 23cm band operations.
I had to provide the 1152 MHz LO signal to an RMS-5 DBM.
I found a Macom synthesizer (1000-1400 MHz). The reference clock provided by a Vectron OCXO.
The synth programmed by a PIC12F675 MCU. The proper level of LO I used two MAR-3 amplifier.