DE
DANIELS
ELECTRONICS
Enhanced AM/FM Synthesizer Instruction Manual OS(R/T)-3(A/H) 29 - 470 MHz
3-7
2)
External
reference input . Install jumper JU1-A, JU2 on Analog Board. This mode
is used in applications requiring better than ±1 ppm frequency stability. An external
9.6/10.0 MHz reference signal must be provided at synthesizer SMB connector J1.
(Located on the Analog Board)
3)
Reference
Frequency
Select . Install jumper JU2 on Digital Board to select a
10.0 MHz reference frequency. When not installed, the reference frequency
selected is 9.6 MHz. JU2 must not be installed when using the internal 9.6 MHz
TCXO reference. JU2 is used by the microcontroller to establish the correct
reference frequency division ratio. (Located on the Digital Board; The Synthesizer
module must be removed to change jumper JU2)
4)
AM
Multichannel
Synthesizer
Select . Install jumper JU1 on Digital Board to select
AM Multichannel Synthesizer with Frequency Select Handle. (Located on the Front
Panel)
Remember : Care must be exercised when installing the reconfigured synthesizer module back into
the transmitter board or the IF/audio board. Pay careful attention to pin alignment before pressing
the synthesizer module into its mating sockets.
