Digital scale / Frequency counter DS018. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / Digital technology

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Product Features:

Measuring frequency range	1 kHz...35 MHz.
Frequency resolution	100Hz.
Reading update rate	constant, 5 times/sec.
Input voltage	not less than 0,5v. eff.
Device supply voltage:	7...24V.
Consumption current	no more than 100mA*

* The total current consumption of DS018 and DLED1_6 is not more than 70mA.

Features of Measuring Unit DS018

• Possibility of using in frequency counter mode.
• Separate execution of the Measuring block DS018 and the Indicator.
• Minimum number of connecting wires (GND; Data).
• Reading update rate 5 times / sec.
• The data transfer rate from the Measuring Unit DS018 to the Indicator was chosen as low as possible, which made it possible to get rid of interference on the sensitive receiving path of the transceiver without any additional shielding.
• Separate power supply for the Measuring Unit DS018 and the Indicator.
• The length of the communication line between the Measuring Unit and the indicator is up to 5 meters (I).
• LSB digital hysteresis minimizes LSB "jitter".
• Possibility of parallel connection of an unlimited number of indicators to one Measuring Unit DS018 (duplication of indications).
• Operability in transceivers using LO frequency doubling (*2).
• Support for up to 12 operating ranges.
• Short-term transition to the frequency counter mode by pressing the button located on the board of the Measuring Unit.
• Possibility of multiple (at least 100000 times) reprogramming by the User of the IF value or the frequency of the "stand" for each range separately, as well as the sign (addition or subtraction).
• Easy-to-understand and user-friendly change of settings.
• Non-volatile EEPROM memory for storing User settings.
• Preservation of User settings for more than 10 years without supply voltage.
• User switchable EEPROM memory protection against accidental erasure during power failures.
• Possibility of electronic calibration of the Digital Scale/Frequency Meter by the User according to the Reference Generator.
• Low current consumption.
• Compact dimensions 54x44x23mm. (width, length and height of the board).

Features of LED Indicator DLED1_6:

• Uniform illumination of all segments.
• Smooth/step adjustment of indicator brightness.
• High speed dynamic indication.
• Low current consumption.
• Compact dimensions 64x34x18mm. (width, length and height of the board). 45,5x14mm (indicator window).

Measuring Unit DS018

LED indicator DLED1_6

Schematic diagram of the measuring unit DS018

Schematic diagram of DLED1_6 LED display

Author: Nikolay Bolshakov, rf.atnn.ru

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