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New Version - 50MHz LCD Frequency Counter Module with programmable IF Offset.

The FCM is a highly flexible frequency counter that incorporates programmable IF offset {parameters are stored in non-volatile EEPROM}. Its small size allows it to be incorporated into your own equipment and your battery will hardly notice its modest current requirement. An input buffer isolates the counter to minimize loading of the signal source. The 16 character display is a high contrast, LCD that's easily viewable over a wide angle in modest lighting conditions. Operation is as simple as connecting power and a signal source.
The FCM has the ability to display the actual frequency, or add or subtract pre-defined or user defined offset frequency {Intermediate Frequency}, making it suitable as a frequency display for a Direct Conversion {“direct mode”} or Superheterodyne {“offset mode”} receiver. It is also suitable for transmitters using "on frequency" VFO.
The IF frequency {offset} is either selected from a pre-defined table of 28 common IF frequencies or can be user set {“program mode”} to any frequency in the range 1KHz to 45.999MHz (min resolution is 1KHz) using the on-board DIP switch.

New Hardware released Rev 3.0 Jan 2014

New Software released Rev 3.3 Feb 2014

Features

PIC Processor with EEPROM
16 x 2 character high contrast LCD (Liquid Crystal Display) {Blue with backlight}
28 pre-programmed IF offsets
1 user programmable IF offset {1KHz to 45.999MHz in 1KHz steps}
Direct frequency measurement {no IF offset}
Programmable display calculation: Direct, VFO+IF, VFO-IF & IF-VFO
Guaranteed minimum 50 MHz operation {up to 60MHz +}
Indirect frequency measurement: VFO + IF , VFO - IF & IF - VFO
Accuracy is in the order of +/-10Hz
Frequency resolution 10 Hz
32 bit arithmetic calculations for highest accuracy
Factory calibrated at 48.0000 MHz
Calibration function implemented in both hardware and software

Pre-defined IF Offsets

Pos	Frequency			Pos	Frequency
1	0.000	MHz		15	3.180	MHz	Hallicrafters
2	0.450	MHz		16	3.955	MHz	Hammarlund
3	0.455	MHz		17	5.138	MHz	Hammarlund
4	0.460	MHz		18	5.500	MHz	Swan
5	0.465	MHz		19	6.000	MHz
6	0.470	MHz		20	8.000	MHz
7	0.475	MHz		21	9.000	MHz	Hallicrafters
8	0.480	MHz		22	9.216	MHz
9	1.560	MHz		23	9.720	MHz
10	1.600	MHz	National	24	10.700	MHz
11	1.650	MHz		25	11.200	MHz
12	2.075	MHz	Hallicrafters	26	11.700	MHz
13	3.035	MHz	Yaesu	27	11.800	MHz
14	3.045	MHz	Hammarlund	28	21.400	MHz

User definable IF Offset

Can be programmed to any frequency in range 1KHz to 45.999MHz in 1KHz steps

Specifications

Dimensions - 80mm x 35mm
Power Supply - 7.5-20VDC @ 20mA, typical, reverse polarity protected
Input Sensitivity - adjustable by on board potentiometer
Input Frequency - 500 Hz to >50 MHz +/- 10Hz
Gate Period - 400ms
Controls - LCD contrast, Sensitivity, 4 Way DIP Switch, Prog Jumper
Inputs - Power, Signal

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