Difference between revisions of "Frequency Counter 6 Digits"
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* [https://www.aliexpress.com/item/32409549421.html?spm=a2g0s.9042311.0.0.57454c4dTMyjam AliExpress listing] | * [https://www.aliexpress.com/item/32409549421.html?spm=a2g0s.9042311.0.0.57454c4dTMyjam AliExpress listing] | ||
| + | ** AKA: PLJ-6LED | ||
* Frequency reference with temperature compensation type voltage controlled crystal oscillator (2.5 ppm VC-TCXO). | * 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. | * Adopts gate control mode and the accurate time algorithm is unique. | ||
| Line 34: | Line 35: | ||
[[File:FC6-dig-AliExpress-04.PNG]] | [[File:FC6-dig-AliExpress-04.PNG]] | ||
| + | |||
| + | == Menu == | ||
| + | |||
| + | [[File:FC6-dig-Menu.PNG]] | ||
| + | |||
| + | * [https://www.mpja.com/download/35057tebasic%20manual.pdf Manual] | ||
== Testing == | == Testing == | ||
| Line 49: | Line 56: | ||
** 9-24 VDC input | ** 9-24 VDC input | ||
** 7 VDC output | ** 7 VDC output | ||
| + | *** Lowers stress on 7505 regulator on the card (more stable due to lower temperature) | ||
** Hot glued into case | ** Hot glued into case | ||
* 2.1x5.5 DC jack | * 2.1x5.5 DC jack | ||
| Line 56: | Line 64: | ||
== Calibration == | == Calibration == | ||
| − | * [[Frequency_Calibration_via_GPS#Features]] | + | * [[Frequency_Calibration_via_GPS#Features|Use GPS output as frequency source]] |
| + | ** GPS output is set to 8 MHz | ||
| + | * Adjust control with ceramic screwdriver | ||
| + | |||
| + | [[File:FreqCounter-6Digits-FreqAdjustment-720px.jpg]] | ||
== Videos == | == Videos == | ||
| Line 63: | Line 75: | ||
<video type="youtube">WWy0821JLUQ</video> | <video type="youtube">WWy0821JLUQ</video> | ||
| + | |||
| + | <video type="youtube">uqCkhB_hzmM</video> | ||
Latest revision as of 12:42, 28 November 2020
Contents
Features
- 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.
Specification
- 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 .
- Connectors
- RF IN (input): HX2.54-2P socket
- ICSP (programming interface): 2.54-6P Pin
- DC IN (Power Interface): HX2.54-2P socket
Connections
Menu
Testing
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
Calibration
- Use GPS output as frequency source
- GPS output is set to 8 MHz
- Adjust control with ceramic screwdriver
Videos
