FC-510 history:

Version 0.7

Fref = 12.8 
10-  

Version 0.8

Fref = 100  (PLL)
8-  

?  Fref.  Fref = 100 MHz 
     ,  ,
     . ,  
     .
     ,  
  Fref = 12.8 MHz,  .
   PLL  VCO 100 MHz -   ,
    ( ,   VCO 
   VCXO),      EPM3064
  (    ).
+ Fref = 12.8 

?   TCXO  .
  , TCXO    
  .   CPLD 
  .  CPU   :
    (  - HF XTAL
  Full Amplitude),   XTAL2  
  CPLD.
+   TCXO   
  -  BFT93.   , 
     .   
    CPLD.  CPLD  
    Fcpu = Fref/1, Fref/2, Fref/4,
  Fref/8.     TCXO
    100 MHz.

?    PulseIn 
    LCELL?
-    . ,
  - ,    .

?    .
+  ,   
   N .  N = 10,
     
  .

?      
  ?
- .    .
     ,
      
   .

-    (  ,
     ,   
   ).
+   JFET.    
       
  5 - 10     2 - 4 .
     OP777   -0.5..-2 .

-      .
+     
  . -   
   ()   
      -5 . ,
    JFET,  
     ,   
   -5      .
     .
   LC  (56 uH + 4.7 uF x 25 V)  79L05.
    LM2576  470 uH ( 100 uH).
-     LM2596  
    .
        +
  .
+     ,  
  ,   .

-     
   .
+    85  (  56 ).
    120    .

? -     
  100 ,      170 .
    ?

-      BAV199,
   JY* (p, t)
    ,   BAV99.

-   M  N    
  Agilent.

-      74HC595 + LED.

Version 1.0

     5      Ver10.
    ,   Fcpu.

Version1.1

+ Altera:      CPU.
+ Altera:   SData   FrefGate,  FinGate.
+ Altera:   Mode.   FinGate 
   d- FrefGate  .    
  Mode   ""   Fin,  !Fin.  
     FrefCnt    
        .   
    th  tl.

-   .
+   Fref     Gate.
      (),
     - .
?  ,     10 .

-     () .
+   dF.

- Auto Range.
+ .

-        
  ?
? ?

-   MODE_N    .
     Altera   QFin  
   Fin.      
   .     6.4 .
-     .

-     MODE_GC   : 
    Altera,   QRef    
  , , 10  (Fclk/128).    
  .      .
-     .

-        
  .
?     .
      ?
-     .

Version1.2

+    .  
          100 .
      .

-  PAR_PRE_NOM ,     (
   ).

?     PC?
- .     ,
   "F 50,000.000 kHz" <Cr><Lf> 

?    ?
    BF960, BF998   1 .

-   LCD 1601

Version1.3

+     ,     
   .

+     .

+     .

+    "MENU"   HOLD
    .

Version1.4

+     :
  LCD10 ( MT-10T7  MT-10T8) 
  LCD16 ( 1601).

+   LCD16   
  .     .
