Ramsey Electronics FX Series - Page 31

RAMSEY FX-series Programming Worksheet
To convert N from decimal to binary, simply TRY to subtract EACH of the 16
binary values from N, always in descending order, always starting with 32768
and always ending with 1. This process will always yield 16 YES or NO
answers, which will give you exact diode installation instructions.
N = Freq in KHz divided by 5 KHz (or, Freq in MHz divided by .005)
Let's try doing an example. We want to receive 223.5 MHz:
N = 223500 ÷ 5 = 44,700 Now, convert to binary...
Install diodes in YES positions only.
See FX-series instruction book, Section H, for ham band shortcuts for 32K
through 1K programming positions. If an auxiliary split is needed or if you are
not licensed to transmit in a band portion, do not install diodes in SIMP, +RPT
or -RPT positions.
145.55 - 29,110 0 1 1 0 1 1 0 1 1 0
146.52 S 29,304 1 0 0 1 1 1 1 0 0 0
Subtracting from N: Remainders & Doodles NO YES Position
Can you subtract 32768? 32768
Can you subtract 16384? 16384
Can you subtract 8192? 8192
Can you subtract 4096? 4096
Can you subtract 2048? 2048
Can you subtract 1024? 1024
Can you subtract 512? 512
Can you subtract 256? 256
Can you subtract 128? 128
Can you subtract 64? 64
Can you subtract 32? 32
Can you subtract 16? 16
Can you subtract 8? 8
Can you subtract 4? 4
Can you subtract 2? 2
Can you subtract 1? 1
Will this be a Simplex
channel?
SIMP
Will Transmit be 600 KHz
LOWER than Receive?
- RPT
Will Transmit be 600 KHz
HIGHER than Receive?
+ RPT