www.hed-radio.com www.ctcss.de Edition 8.3 How to install your CTCSS-Unit CTN-520 remake for STANDARD C-220, C-228, C-520, C-528, C-620, C-628 This unit is an improved remake of the legendary CTN-520. Plase take care on ESD-safe handling. 1. Remove both screws of the backside 2. Remove both screws of bottom / front-side 3. Separate the back panel from the front panel carefully 4. Take of the paper from the tape, put in the plug and put the unit onto the controller. After installation it is not necessary to reset your portable You can immediately start after closing your STANDARD Tel.: (0049) (0)9127 594866 page 1 von 2 www.hed-radio.com [email protected] www.hed-radio.com www.ctcss.de Edition 8.3 ! Please check deviation of CTCSS-signal ! Settings on your portable: Setting CTCSS-tone-frequency: Press and hold function-key, then push key „0“ and release Func-key. After this push key „7“. Your display will show you some numbers. This is the current CTCSS-frequency. You can change it by turning the VFO-knob. Confirm by pushing PTT. Transmitting with CTCSS-tone: Press and hold the function-key and press key “7“. „T“ will be displayed. Now your transmission is combined with a CTCSS-tone. Receiving only CTCSS-stations with same CTCSS-frequencies: Press and hold the function-key and press key “7“ again. Now your display shows „T.SQ“. Squelch only will open when a singal with correct CTCSS-frequency is being received. In addition your transmission is combined with the selected CTCSS-tone. Technical details: Oszillatorfrequency CTCSS-Frequencies: Output-level 20MHz 38 (67 – 250,3Hz) :ca. 200mV, adjustable tolerance: < 0,5% CTCSS-inputs: 2 Adjustment transmitter: f-Hub low-freq ~ 0,70kHz f-Hub high-freq ~ 0,65kHz Tel.: (0049) (0)9127 594866 page 2 von 2 www.hed-radio.com [email protected]