TX Functions

Functions
void	QN8066::resetAudioPeak ()
	TX Audio peak clear signal.
void	QN8066::setTX (uint16_t frequency)
	Sets the TX mode.
void	QN8066::setTxStereo (bool value=true)
	Set TX Stereo or Mono.
void	QN8066::setTxMono (uint8_t value=0)
	Set TX Stereo or Mono (Same setTxStereo )
uint8_t	QN8066::getTxMono ()
	Gets TX Stereo or Mono setup.
void	QN8066::setTxPreEmphasis (uint8_t value=75)
	Pre-emphasis and de-emphasis time constant.
void	QN8066::setPreEmphasis (uint8_t value=1)
	Pre-emphasis and de-emphasis time constant - Same setTxPreEmphasis.
void	QN8066::setTxPilotGain (uint8_t value)
	Gain of TX pilot to adjust pilot frequency deviation.
void	QN8066::setTxSoftClipThreshold (uint8_t value)
	TX soft clip threshold.
void	QN8066::setTxOffAfterOneMinuteNoAudio (bool value)
	Set of 1 minute time for PA off when no audio.
void	QN8066::setTxOffAfterOneMinute (uint8_t value)
	Sets PA Off after 1 minute time when no audio.
void	QN8066::setAudioAnalogGain (uint8_t value)
	Sets volume control gain of analog portion.
void	QN8066::setAudioDigitalGain (uint8_t value)
	Sets set digital volume gain.
void	QN8066::setAudioDacHold (bool value)
	DAC output control.
void	QN8066::setAudioTxDiff (bool value)
	Tx audio input mode selection.
void	QN8066::setTxInputImpedance (uint8_t value)
	TX mode input impedance for both L/R channels.
void	QN8066::setTxDigitalGain (uint8_t value)
	TX digital gain.
void	QN8066::setTxInputBufferGain (uint8_t value)
	TX input buffer gain.
void	QN8066::setTxSoftClippingEnable (bool value)
	TX soft clipping enable.
void	QN8066::setTxFrequencyDerivation (uint8_t value)
	Specify total TX frequency deviation.
void	QN8066::setPAC (uint8_t PA_TRGT)
	PA output power target control.
void	QN8066::updateTxSetup ()
	Reset the system kepping the TX current STATUS.
void	QN8066::setToggleTxPdClear ()
	TX Audio peak clear signal.
int	QN8066::getAudioPeakValue ()
	Audio peak value at ADC input.

Detailed Description

The functions defined in this group are responsible for controlling the transmitting of the QN8066.

Function Documentation

resetAudioPeak()

void QN8066::resetAudioPeak ( )

inline

TX Audio peak clear signal.

Same setToggleTxPdClear (synonym)

Audio peak value is max-hold and stored in aud_pk (see STATUS register). Once TXPD_CLR is toggled, the aud_pk value is cleared and restarted again

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  ...
  tx.resetAudioPeak();   
}
void loop() {
}

References QN8066::setToggleTxPdClear().

setTX()

void QN8066::setTX

(

uint16_t

frequency

)

Sets the TX mode.

To avoid working with the float data type, the frequency parameter must be the desired frequency multiplied by 10.

For example, if the user wants to tune to 106.9 MHz, the parameter to be sent is 1067.

This approach reduces the size of the final code (binary) as well as avoids the inaccuracies of floating-point mathematical operations.

Parameters

frequency

- Frequency to be set

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
}
 
void loop() {
}

Todo:

Under improvements - Need to be optimized to improve space size

setTxStereo()

void QN8066::setTxStereo

(

bool

value = true

)

Set TX Stereo or Mono.

Parameters

value

(true = stereo; false = mono)

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxStereo(true);
}
 
void loop() {
}

setTxMono()

void QN8066::setTxMono

(

uint8_t

value = 0

)

Set TX Stereo or Mono (Same setTxStereo )

Parameters

value

(1 = Mono, 0 = Stereo )

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxMono(0); // Sets Stereo
}
 
void loop() {
}

getTxMono()

uint8_t QN8066::getTxMono

(

)

Gets TX Stereo or Mono setup.

Returns

uint8_t - 1 = Mono; 0 = Stereo

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  if ( tx.getTxMono() ) {
     // It is in mono mode
  }
}
 
void loop() {
}

setTxPreEmphasis()

void QN8066::setTxPreEmphasis

(

uint8_t

value = 75

)

Pre-emphasis and de-emphasis time constant.

The valid values are 50 and 75. Any value not equal to 75 sets the Pre-emphasis to 50.

Parameters

value

(valids values: 50 or 75);

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxPreEmphasis(75);
}
 
void loop() {
}

setPreEmphasis()

void QN8066::setPreEmphasis

(

uint8_t

value = 1

)

Pre-emphasis and de-emphasis time constant - Same setTxPreEmphasis.

The valid values are 0 and 1.

Parameters

value

(valids values: 0 = 50us or 1 = 75us );

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setPreEmphasis(1); // 75 us
}
 
void loop() {
}

setTxPilotGain()

void QN8066::setTxPilotGain

(

uint8_t

value

)

Gain of TX pilot to adjust pilot frequency deviation.

Refers to peak frequency deviation of MPX signal when audio input is full scale. Valid values: between 7 and 10.

the frequency deviation is value (%) * 75 kHz.

Parameters

value

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxPilotGain(7);   // 7 * 75 kHz
}
 
void loop() {
}

setTxSoftClipThreshold()

void QN8066::setTxSoftClipThreshold

(

uint8_t

value

)

TX soft clip threshold.

See table below.

tx_sftclpth	value
0 - 00	12’d2051 (3db back off from 0.5v)
1 - 01	12’d1725 (4.5db back off from 0.5v)
2 - 10	12’d1452 (6db back off from 0.5v)
3 - 11	12’d1028 (9db back off from 0.5v)

Parameters

value

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxSoftClipThreshold(2);   // 2 = 12’d1452 (6db back off from 0.5v) 
}
 
void loop() {
}

setTxOffAfterOneMinuteNoAudio()

void QN8066::setTxOffAfterOneMinuteNoAudio

(

bool

value

)

Set of 1 minute time for PA off when no audio.

Parameters

value

(true = Infinity (never turn it off); false = turn it ofafter about 1 minue )

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxOffAfterOneMinuteNoAudio(false);   // Do not sleep after 1 minute with no audio
}
 
void loop() {
}

setTxOffAfterOneMinute()

void QN8066::setTxOffAfterOneMinute

(

uint8_t

value

)

Sets PA Off after 1 minute time when no audio.

do almost the same setTxOffAfterOneMinuteNoAudio

Parameters

value

(3 = Infinity (never turn it off); 2 = off after 59s; 1 = off after 58s; 0 = off after 57s )

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxOffAfterOneMinute(3);   // Never sleep
}
 
void loop() {
}

setAudioAnalogGain()

void QN8066::setAudioAnalogGain

(

uint8_t

value

)

Sets volume control gain of analog portion.

Valid values are 0 to 7.

Parameters

value

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setAudioAnalogGain(5);   // -24 dB
}
 
void loop() {
}

setAudioDigitalGain()

void QN8066::setAudioDigitalGain

(

uint8_t

value

)

Sets set digital volume gain.

Valid values are 0 to 5.

Parameters

value

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setAudioDigitalGain(3);   // -3 dB
}
 
void loop() {
}

setAudioDacHold()

void QN8066::setAudioDacHold

(

bool

value

)

DAC output control.

If value is 0 (false), then "Normal operation"; if true, Hold DAC output to a fixed voltage.

Parameters

value

(true or false)

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setAudioDacHold(false);   // Normal operation
}
 
void loop() {
}

setAudioTxDiff()

void QN8066::setAudioTxDiff

(

bool

value

)

Tx audio input mode selection.

If value is 0 (false), then "Single ended"; if true, Differential

Parameters

value

(true or false)

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setAudioTxDiff(true);   // Differential
}
 
void loop() {
}

setTxInputImpedance()

void QN8066::setTxInputImpedance

(

uint8_t

value

)

TX mode input impedance for both L/R channels.

Sets the imput impedance Left and Rihgt channels

RIN Value	Input impedance (k)
00 (0)	10
01 (1)	20
10 (2)	40
11 (3)	80

Parameters

value

(true or false)

See also

Data Sheet - Quintic - QN8066 - Digital FM Transceiver for Portable Devices, pag. 35

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxInputImpedance(0);   // 10 K Ohms 
}
 
void loop() {
}

setTxDigitalGain()

void QN8066::setTxDigitalGain

(

uint8_t

value

)

TX digital gain.

TX digital gain

TXAGC_GDB	Digital gain
00 (0)	0 dB
01 (1)	1 dB
10 (2)	2 dB
11 (3)	Reserved

Parameters

value

See also

Data Sheet - Quintic - QN8066 - Digital FM Transceiver for Portable Devices, pag. 35

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxDigitalGain(2);   // 2dB 
}
 
void loop() {
}

setTxInputBufferGain()

void QN8066::setTxInputBufferGain

(

uint8_t

value

)

TX input buffer gain.

Sets TX input buffer gain

TXAGC_GVGA	Attenuation depending on RIN - 0, 1, 2 AND 3 RESPECTIVELY
0 - 000	3; -3; -9; -15
1 - 001	6; 0; -6; -12
2 - 010	9; 3; -3; -9
3 - 011	12; 6; 0; -6
4 - 100	15; 9; 3; -3
5 - 101	18; 12; 6; 0
Others	Reserved

Parameters

value

See also

Data Sheet - Quintic - QN8066 - Digital FM Transceiver for Portable Devices, pag. 35

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setsetTxInputImpedance(0);  // Sets the input impedance to 10 Kohms
  tx.setTxInputBufferGain(5);    // Now the Gain will be 18dB
}
 
void loop() {
}

setTxSoftClippingEnable()

void QN8066::setTxSoftClippingEnable

(

bool

value

)

TX soft clipping enable.

Parameters

value

(true = enabled; false = disabled)

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxSoftClippingEnable(true);  // Enabled
}
 
void loop() {
}

setTxFrequencyDerivation()

void QN8066::setTxFrequencyDerivation

(

uint8_t

value

)

Specify total TX frequency deviation.

TX frequency deviation = 0.69KHz*TX_FEDV. The default value is 108 (Binary: 01101100)

Parameters

value

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setTxFrequencyDerivation(120);  // About +- 84 kHz
}
 
void loop() {
}

setPAC()

void QN8066::setPAC

(

uint8_t

PA_TRGT

)

PA output power target control.

PA output power target is 0.91*PA_TRGT+70.2dBu. .

Parameters

pacValue

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setPAC(56);  // 
}
 
void loop() {
}

updateTxSetup()

void QN8066::updateTxSetup

(

)

Reset the system kepping the TX current STATUS.

Some functions do not affect the system when the TX mode is on. In this case, you must use these functions after configuring certain parameters.

Todo:

Make it work - Under construction

setToggleTxPdClear()

void QN8066::setToggleTxPdClear

(

)

TX Audio peak clear signal.

Audio peak value is max-hold and stored in aud_pk (see STATUS register). Once TXPD_CLR is toggled, the aud_pk value is cleared and restarted again

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  tx.setToggleTxPdClear();   
}
 
void loop() {
}

Referenced by QN8066::resetAudioPeak().

getAudioPeakValue()

int QN8066::getAudioPeakValue

(

)

Audio peak value at ADC input.

Audio peak value at ADC input is aud_pk * 45mV. See STATUS3 register.

Returns

integer value result of aud_pk * 45 (in mV).

Example

#include <QN8066.h>
QN8066 tx;
void setup() {
  tx.setup();
  tx.setTX(1069); // Set the transmitter to 106.9 MHz 
  int audioPeak = tx.getAudioPeakValue();   // Stores the current audio peak value
  ...
}
 
void loop() {
}

References QN8066::getStatus3().