Reciprocal Frequency Counter FC-510+ by NSM and S56FPW

Reciprocal counter FC-510+
- front view

Using 10MHz OCXO-GPSDO and
a pasive f*2 - inside view

CPU Unit (PCB by S56FPW)

Using 20MHz VCTCXO for counter
and a f/2 divider for the GPSDO

More FC-510+ documents

20MHz VCTCXO Vfc circuit revision

20MHz VCTCXO R-divider calculation

6GHz Input unit with prescaler

• Reciprocal Frequency Counter by Kasper Pedersen (pdf)
  
• CPU Unit Schematics (pdf)
  
• Display Unit Schematics (pdf)
  
• 0 to 280MHz Input Unit Schematics (pdf)
  
• A Passive Frequency Doubler 20MHz (pdf)
  

Direct Frequency Counter by S53MV

Direct counter TTL/RF/4GHz/
/20GHz prescaler

Inside view

10MHz TCXO/extern switch

Direct Frequency Counter by Ana T.

Direct counter up to 800MHz
using ECL parts

Inside view