Daniels Electronics OSR-3H061, Инструкция по эксплуатации

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Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
128-174 MHz - Theory of Operation
38
Synthesizer Base and Frequency Increments
The OS(R/T)-3H Synthesizer operates in frequency increments of 5.0/6.25/2.5kHz. 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-3H141 132-150MHz 128MHz 5.0/6.25/2.5kHz
OST-3H162 150-174MHz 150MHz 5.0/6.25/2.5kHz
OSR-3H141 128.6-152.6MHz 128MHz 5.0/6.25/2.5kHz
OSR-3H162 150-174MHz 150MHz 5.0/6.25/2.5kHz
5.0/6.25/2.5kHz Channelization
The OS(R/T)-3H synthesizers have been designed to generate frequencies in 5.0, 6.25, and
2.5kHz 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, from 5000 to 9999 increment the frequency by 6.25 kHz increments, and from
A000 to F999 increment the frequency by 5.0 kHz with a 2.5 kHz offset. The channel numbers
starting at F000 are a combination of hexadecimal and decimal; the fi rst digit ‘A’ is hexadecimal
and the rest are decimal. 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-3H162 synthesizer has a base frequency of 150MHz. The selected channel
code number is 0350. The synthesizer output frequency is: 0350 x 5kHz = 150MHz = 151.75MHz code number is 0350. The synthesizer output frequency is: 0350 x 5kHz = 150MHz = 151.75MHz
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 OSR-3H141 synthesizer has a base frequency of 128MHz. The selected channel code
number is 5544. The synthesizer output frequency is: (5544-5000) x 6.25kHz +128MHz = 131.4MHz number is 5544. The synthesizer output frequency is: (5544-5000) x 6.25kHz +128MHz = 131.4MHz
BCD switch settings from A000 to F999 :
Subtract A from the most signifi cant BCD digit of the channel code number, multiply
the result fo 5.0 kHz, add 2.5 kHz, and add the result to the base frequency.
Example: An OST-3H162 synthesizer has a base frequency of 150 MHz. The selected
channel code number is B778. The synthesizer output frequency is: B-A = 1 => 1778 channel code number is B778. The synthesizer output frequency is: B-A = 1 => 1778