G4HUP Frequency Converter Pages

Some DFS implementations, for example 106.5MHz, work much better from a 15MHz source reference than from 10MHz. Coincidentally, some of the more recent GPS locked kit to come out of commercial service provides a 15MHz output. An example of such equipment is the Lucent RFTG-m-XO/Rb pair. Other later Lucent kit also provides this 15MHz signal locked to GPS.

For those who already have a 10MHz source, this Frequency Converter derives a clean 15MHz signal locked to the 10MHz GPS (or OCXO). This gives a simple method of meeting the input requirements of the 106.5MHz DFS and and others which work better from 15MHz. The result is a cleaner mixing/dividing process, which results in less potential spurii in the final output signal.

Physical

• 74 x 55 x 30mm tin-plate box (3" x 2.25" x 1.2" approx)
• Connectors - SMA Female
• Construction - surface mount

Performance

• Supply Voltage - 10 - 15V DC
• Supply Current - 160mA when equipped with input buffer (90mA without)
• Input - 10MHz at +10dBm
• Output - 15MHz at +9dBm
• Spurii - <-60dBc
• Harmonics - <-45dBc

Top view of FC10-15	Underside view of FC10-15

Ouptut Spectrum of FC10-15 - grass to left of screen is due to Spectrum Analyser!