Daniels Electronics OSR-3H061, Инструкция по эксплуатации

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Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
29 - 71.4 MHz - Theory of Operation
10
Synthesizer Base and Frequency Increments
The OS(R/T)-3H Synthesizer operates in frequency increments of 5.0/6.25kHz. The Base
Frequency for any given synthesizer model is the lowest frequency generated.
Model Number Freq. Range Base Freq. Freq. Increment Model Number Freq. Range Base Freq. Freq. Increment
OST-3H035 29-38MHz 29MHz 5.0/6.25kHz
OST-3H045 38-50MHz 29MHz 5.0/6.25kHz
OSR-3H061 50.4-71.4MHz 50.4MHz 5.0/6.25kHz
5.0/6.25kHz Channelization
The OS(R/T)-3H synthesizers have been designed to generate frequencies in both 5.0 kHz
and 6.25 kHz channel increments. The frequency increments are determined by the channel
code number range. The channel code numbers from 0000 to 4999 increment the frequency
in 5.0 kHz increments, and channel code numbers from 5000 to 9999 increment the frequency
by 6.25 kHz increments. The channel code number is either stored in the synthesizer’s
memory or by the BCD switches on the transmitter or receiver’s main board. The channel
number determines where the channel code number is retrieved from; channel 1 is stored by
the BCD switches, and channels 2 through 16 are stored in the synthesizer’s memory.
To calculate the operating frequency for the OS(R/T)-3H from the channel code
numbers refer to the Channel Table Instruction Manual or the calculations below.
BCD switch settings from 0000 to 4999 :
Multiply the switch setting by 5.0kHz and add the result to the synthesizer base frequency.
Example: An OST-3H045 synthesizer has a base frequency of 29MHz. The selected channel
number is 0988. The
synthesizer synthesizer
output frequency is: ((988 x 5kHz) +29MHz) = 33.940MHz output frequency is: ((988 x 5kHz) +29MHz) = 33.940MHz
synthesizer synthesizer synthesizer synthesizer
BCD switch settings from 5000 to 9999 :
Subtract 5000 from the switch setting. Multiply the result by 6.25kHz
and add the result to the synthesizer base frequency.
Example: An OST-3H035 synthesizer has a base frequency of 29MHz. The selected channel number
is 7205. The synthesizer synthesizer output frequency is: (((7205-5000) x 6.25kHz) +29MHz) = 42.78125MHz output frequency is: (((7205-5000) x 6.25kHz) +29MHz) = 42.78125MHz