28 Digital Circuitry TB9100 Reciter Service Manual
© Tait Electronics Limited January 2006
which continuously monitors and maintains the 40MHz VCXO to a fixed
frequency and constant phase relationship with respect to a 12.8MHz
reference. The 40MHz VCXO oscillator is electrically tuned using two
varactors. The oscillator output is buffered before being distributed to the
digital circuitry.