Olson Technology OTD-3000 User Manual
Page 9
025-000053 REV G
Page 9
OTD-3000 DEMODULATOR CODES
FOR
NON-STANDARD CHANNELS
COMPUTING SWITCH SETTINGS FOR NON-STANDARD FREQUENCIES
The OTD-3000 can be set for any frequency between 54.00 and 801.25MHz in .25MHz steps.
Positions 1 through 8 of the left switch and positions 1 through 4 of the right switch each have
decimal values as shown in figure 2 below.
LEFT SWITCH RIGHT SWITCH
Switch position 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Decimal Number 1 2 4 8 16 32 64 128 256 512 1024 2048
Binary Number 1 1 1 1 1 1 1 0 0 1 0 0
The Binary number shown is for 114.00MHz.
FIGURE 2 - DIP SWITCH VALUES
A)
Decide on the desired frequency yyy.xx.
B)
Compute the L.O. frequency required by adding 45.75 to the desired frequency.
C)
Divide the L.O. frequency by the step size, .25 to obtain “divide by N”.
D)
Convert “N” to reversed binary (least significant bit on the left) using chart.
E)
Select the proper input tuner band and set the switches 5, 6 and 7 of the right side switch per chart
on page 4.
BAND
SWITCH
AFC