LF: SV: LF Receivers

["Johan Bodin" <sm6lkm.jbeab@swipnet.se>]

Andy,

> But isn't the accuracy and stability of a cheap colour subcarrier xtal,
> pulled more than 100ppm from its normal operating point,  going to swamp the
> values you derive from the 'nice' numbers generated with integer maths ?
Not if it is phase locked to the 5/10MHz standard. 

My idea was to use a second DDS chip as divider (with fixed "nice number"
phase increment) to get a "nice number" PLL reference frequency. The VCXO
is then the only odd-ball frequency in the system.

See attached block diagram.

73
Johan SM6LKM