mirror of
https://codeberg.org/mclemens/ubitxv6.git
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220 lines
6.5 KiB
C++
220 lines
6.5 KiB
C++
#include "tuner.h"
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#include <Arduino.h>
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#include "nano_gui.h"
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#include "pin_definitions.h"
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#include "si5351.h"
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static const uint32_t THRESHOLD_USB_LSB = 10000000L;
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void saveVFOs()
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{
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SaveSettingsToEeprom();
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}
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void switchVFO(Vfo_e new_vfo){
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ritDisable();//If we are in RIT mode, we need to disable it before setting the active VFO so that the correct VFO gets it's frequency restored
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globalSettings.activeVfo = new_vfo;
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setFrequency(GetActiveVfoFreq());
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redrawVFOs();
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saveVFOs();
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}
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/**
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* Select the properly tx harmonic filters
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* The four harmonic filters use only three relays
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* the four LPFs cover 30-21 Mhz, 18 - 14 Mhz, 7-10 MHz and 3.5 to 5 Mhz
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* Briefly, it works like this,
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* - When KT1 is OFF, the 'off' position routes the PA output through the 30 MHz LPF
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* - When KT1 is ON, it routes the PA output to KT2. Which is why you will see that
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* the KT1 is on for the three other cases.
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* - When the KT1 is ON and KT2 is off, the off position of KT2 routes the PA output
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* to 18 MHz LPF (That also works for 14 Mhz)
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* - When KT1 is On, KT2 is On, it routes the PA output to KT3
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* - KT3, when switched on selects the 7-10 Mhz filter
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* - KT3 when switched off selects the 3.5-5 Mhz filter
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* See the circuit to understand this
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*/
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void setTXFilters(unsigned long freq){
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if (freq > 21000000L){ // the default filter is with 35 MHz cut-off
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digitalWrite(PIN_TX_LPF_A, 0);
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digitalWrite(PIN_TX_LPF_B, 0);
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digitalWrite(PIN_TX_LPF_C, 0);
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}
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else if (freq >= 14000000L){ //thrown the KT1 relay on, the 30 MHz LPF is bypassed and the 14-18 MHz LPF is allowd to go through
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digitalWrite(PIN_TX_LPF_A, 1);
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digitalWrite(PIN_TX_LPF_B, 0);
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digitalWrite(PIN_TX_LPF_C, 0);
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}
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else if (freq > 7000000L){
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digitalWrite(PIN_TX_LPF_A, 0);
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digitalWrite(PIN_TX_LPF_B, 1);
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digitalWrite(PIN_TX_LPF_C, 0);
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}
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else {
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digitalWrite(PIN_TX_LPF_A, 0);
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digitalWrite(PIN_TX_LPF_B, 0);
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digitalWrite(PIN_TX_LPF_C, 1);
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}
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}
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/**
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* This is the most frequently called function that configures the
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* radio to a particular frequeny, sideband and sets up the transmit filters
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*
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* The transmit filter relays are powered up only during the tx so they dont
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* draw any current during rx.
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*
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* The carrier oscillator of the detector/modulator is permanently fixed at
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* uppper sideband. The sideband selection is done by placing the second oscillator
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* either 12 Mhz below or above the 45 Mhz signal thereby inverting the sidebands
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* through mixing of the second local oscillator.
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*/
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void setFrequency(const unsigned long freq,
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const bool transmit){
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static const unsigned long FIRST_IF = 45005000UL;
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setTXFilters(freq);
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//Nominal values for the oscillators
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uint32_t local_osc_freq = FIRST_IF + freq;
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uint32_t ssb_osc_freq = FIRST_IF;//will be changed depending on sideband
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uint32_t bfo_osc_freq = globalSettings.usbCarrierFreq;
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if(TuningMode_e::TUNE_CW == globalSettings.tuningMode){
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if(transmit){
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//We don't do any mixing or converting when transmitting
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local_osc_freq = freq;
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ssb_osc_freq = 0;
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bfo_osc_freq = 0;
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}
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else{
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//We offset when receiving CW so that it's audible
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if(VfoMode_e::VFO_MODE_USB == GetActiveVfoMode()){
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local_osc_freq -= globalSettings.cwSideToneFreq;
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ssb_osc_freq += globalSettings.usbCarrierFreq;
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}
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else{
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local_osc_freq += globalSettings.cwSideToneFreq;
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ssb_osc_freq -= globalSettings.usbCarrierFreq;
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}
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}
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}
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else{//SSB mode
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if(VfoMode_e::VFO_MODE_USB == GetActiveVfoMode()){
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ssb_osc_freq += globalSettings.usbCarrierFreq;
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}
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else{
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ssb_osc_freq -= globalSettings.usbCarrierFreq;
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}
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}
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si5351bx_setfreq(2, local_osc_freq);
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si5351bx_setfreq(1, ssb_osc_freq);
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si5351bx_setfreq(0, bfo_osc_freq);
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SetActiveVfoFreq(freq);
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}
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/**
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* startTx is called by the PTT, cw keyer and CAT protocol to
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* put the uBitx in tx mode. It takes care of rit settings, sideband settings
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* Note: In cw mode, doesnt key the radio, only puts it in tx mode
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* CW offest is calculated as lower than the operating frequency when in LSB mode, and vice versa in USB mode
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*/
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void startTx(TuningMode_e tx_mode){
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globalSettings.tuningMode = tx_mode;
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if (globalSettings.ritOn){
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//save the current as the rx frequency
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uint32_t rit_tx_freq = globalSettings.ritFrequency;
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globalSettings.ritFrequency = GetActiveVfoFreq();
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setFrequency(rit_tx_freq,true);
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}
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else{
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if(globalSettings.splitOn){
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if(Vfo_e::VFO_B == globalSettings.activeVfo){
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globalSettings.activeVfo = Vfo_e::VFO_A;
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}
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else{
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globalSettings.activeVfo = Vfo_e::VFO_B;
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}
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}
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setFrequency(GetActiveVfoFreq(),true);
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}
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digitalWrite(PIN_TX_RXn, 1);//turn on the tx
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globalSettings.txActive = true;
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drawTx();
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}
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void stopTx(){
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digitalWrite(PIN_TX_RXn, 0);//turn off the tx
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globalSettings.txActive = false;
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if(globalSettings.ritOn){
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uint32_t rit_rx_freq = globalSettings.ritFrequency;
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globalSettings.ritFrequency = GetActiveVfoFreq();
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setFrequency(rit_rx_freq);
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}
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else{
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if(globalSettings.splitOn){
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if(Vfo_e::VFO_B == globalSettings.activeVfo){
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globalSettings.activeVfo = Vfo_e::VFO_A;
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}
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else{
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globalSettings.activeVfo = Vfo_e::VFO_B;
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}
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}
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setFrequency(GetActiveVfoFreq());
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}
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drawTx();
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}
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/**
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* ritEnable is called with a frequency parameter that determines
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* what the tx frequency will be
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*/
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void ritEnable(unsigned long freq){
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globalSettings.ritOn = true;
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//save the non-rit frequency back into the VFO memory
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//as RIT is a temporary shift, this is not saved to EEPROM
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globalSettings.ritFrequency = freq;
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}
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// this is called by the RIT menu routine
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void ritDisable(){
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if(globalSettings.ritOn){
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globalSettings.ritOn = false;
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setFrequency(globalSettings.ritFrequency);
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updateDisplay();
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}
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}
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bool autoSelectSidebandChanged(const uint32_t old_frequency)
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{
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const uint32_t new_freq = GetActiveVfoFreq();
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//Transition from below to above the traditional threshold for USB
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if(old_frequency < THRESHOLD_USB_LSB && new_freq >= THRESHOLD_USB_LSB){
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SetActiveVfoMode(VfoMode_e::VFO_MODE_USB);
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setFrequency(new_freq);//Refresh tuning to activate the new sideband mode
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return true;
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}
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//Transition from above to below the traditional threshold for USB
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if(old_frequency >= THRESHOLD_USB_LSB && new_freq < THRESHOLD_USB_LSB){
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SetActiveVfoMode(VfoMode_e::VFO_MODE_LSB);
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setFrequency(new_freq);//Refresh tuning to activate the new sideband mode
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return true;
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}
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return false;
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}
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