Frequency Counter 6 Digits
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- AliExpress listing
- AKA: PLJ-6LED
- Frequency reference with temperature compensation type voltage controlled crystal oscillator (2.5 ppm VC-TCXO).
- Adopts gate control mode and the accurate time algorithm is unique.
- Gate (refresh) time is 0.1 seconds, real-time display of frequency.
- The precision of frequency measurement 10Hz/100Hz (Rotated the right one) optional.
- Dual frequency design, intermediate frequency value and plus / minus mode can be preset, and do not influence each other.
- Display driver using the LED chip digital tube display, high brightness, less external interference.
- Adopts six 0.56 inch digital tube display, automatic blanking invalid zero, eight stage adjustable brightness.
- Simple circuit, reasonable structure, double button control, simple operation.
- All settings are automatically saved, boot directly call.
- Working voltage: DC 8V-15V (reverse polarity protection)
- Working current: 90mA (max)
- Input impedance: high resistance
- Measuring range: 0.1 MHz to 65 MHz
- Accuracy: 10 Hz
- Sensitivity: better than 60mVPP
- Display digits: Six common anode LED display , the highest display six digits
- Size: 9cm x 2.5cm x 2cm .
- RF IN (input): HX2.54-2P socket
- ICSP (programming interface): 2.54-6P Pin
- DC IN (Power Interface): HX2.54-2P socket
Build into case
- Power and input wired to card
- Jacks were too tall for box depth to close securely
- Two pushbuttons wired to Upper/Lower pushbuttons on card
- Mini-360 Switching Regulator
- 9-24 VDC input
- 7 VDC output
- Lowers stress on 7505 regulator on the card (more stable due to lower temperature)
- Hot glued into case
- 2.1x5.5 DC jack
- BNC front panel mount jack
- 100 x 60 x 25 mm Black Plastic Enclosure
- Use GPS output as frequency source
- GPS output is set to 8 MHz
- Adjust control with ceramic screwdriver