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This
PLL was designed mostly for DEMI and DB6NT microwave transverters,
but it could be used as a signal source, beacon, stable freqeuncy
source or something else.
The PLL has 16 programable frequencies. Frequency selection is
possible
over dip switches. The PLL cover any 16 frequencies
in the range of 1050 - 1350 MHz. The modified PLL cover frequencies
up to
2.6 GHz. There is a list of most interesting frequencies:
MHz
1080 2304MHz TRX
1096
1100
1104 Demi 3456MHz TRX
1108
1112
1116
1120
1124
1128
1132
1136 Demi 3cm TRX
1140
1144
1148
1152 23cm TRX
1278 DB6NT 3cm TRX
2556 DB6NT 3cm TRX
The
programmed frequencies cover the entire 23cm band, with 2 meter
IF radio.
The repeater frequency shift and sweep function are programmed
too.
The PLL has built in 10MHz, 2 ppm reference oscillator. Microcontroller
detects external reference
signal on SMA input and automaticaly switches between internal
or external ref.osc.
Output RF level is adjustable from 0 to 15dBm with a small 10
turns potentiometer, and pin attenuator.
For 10GHz DEMI transverter the output level on 1136 MHz is set
to 3dBm.
Remote controll is possible over serial port RS-232.
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