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Frequency Counter/Tone Decoder

The CD100 is a Frequency Counter / Sub-audible Tone Decoder. The CD100 combines a frequency counter and tone decoder in one handheld package. Intended for use by the two-way radio technician for quickly checking portables for frequency and tone, the CD100 is so easy to operate that even non-technical staff will find it easy to use.

Quickly check a fleet of radios and store all data on the CD100's internal memory. Data can be reviewed in the CD100 by manually scrolling through the 100 internal memories. The CD100 will save frequency and any tone data in each memory.

Whether you sell or rent radios, the CD100 will prove to be an affordable and indispensable tool in your shop. Save time and money by combining a sales call into a service call.  Go from job site to job site and quickly have your customers up and communicating in a snap.




  • Frequency Range 10MHz-1GHz

  • Quickly measures frequency and tone for each channel on two-way radios

  • Decodes CTCSS, DCS, LTR, and DTMF

  • Reaction Tune the ICOM R10, R20, R7000, R7100, R8500, R9000, AOR AR8000, AR8200, and Optoelectronics Optocom, R11, OS456, OS456Lite, and OS535

  • 2x16 alphanumeric LCD display with EL backlight

  • Single button controls

  • 100 internal memories for frequency / tone measurement

  • 4 hour NiCad operation

  • 100Hz Resolution

  • Patented Digital Auto Filter

CD100 Frequency Counter

DB32 antenna shown sold separately


                             Technical Specifications


Frequency Range                      10MHz-1GHz

Input Impedance                       50 Ohm

Resolution                                   Fixed 100Hz / 450.0000

Max Input                                    +15dBm (50mW)

Frequency Time Base              10MHz +/- 1ppm initial accuracy

Display                                         2x16 alphanumberic w/ EL backlight

Size                                               5.25"H x3"W x 1.5" D  12oz.

Power Requirements                9-12VDC, 300-1000mA, center +

Battery                                         Internal rechargeable 5 cell NiCd

Battery run time                        4-5 hours on full charge

Download CD100 manual

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