R58.en
Nokia Mobira R58 and subversions RB58, RC58 and RD58
This page is intended to be a collection of modifications for R58 series radio, to be used for both operating radios and R58's used as repeaters, duplex gateways etc.
CTCSS generation/encoding for non-repeater usage
Requires R58 firmware 3.Yz or greater.
The RX front-end DAC can be used for generating CTCSS waveform for TX. The modification is easy and requires just two components, a polystyrene 100n capacitor and a 10k resistor to be installed on the A8 audio board beneath the P8 processor board. All settings are adjusted by the handset.
Parameters:
GE:CtCSSt CTCSS frequency in hertz. For frequencies with decimals, use the nearest full hz. eg. 118.8hz would be 119 and 74.4hz would be 74
PH:CtCGEn option rFcdAc selects the RX RFC DAC output to be used as CTCSS waveform generator during TX.
PH:CtGAin sets the amplitude of the generated waveform.
PH:CtHAnG sets the TOC time in millseconds. TOC eliminates the squelch crash at the receiving station, suspending the CTCSS tone transmission prior to the drop of the carrier.