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Tool/software:
Hi
The side lobes are rising excessively in the spectrum measured during communication as shown below.
The blue trace is measured during communication between regular modems, and the yellow trace is measured by adding one abnormal modem.
All were measured by wire, so there is no effect from external wireless signals.
The waveform was measured for 1 to 2 min at the maximum hold.
I want to know what the cause is.
Thanks
Hi
Please refer to the attached file.
Thanks
/*
* Copyright (c) 2018, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*/
#include "sys/cc.h"
/*---------------------------------------------------------------------------*/
#include <ti/devices/DeviceFamily.h>
#include DeviceFamily_constructPath(driverlib/rf_mailbox.h)
#include DeviceFamily_constructPath(driverlib/rf_common_cmd.h)
#include DeviceFamily_constructPath(driverlib/rf_prop_cmd.h)
#include DeviceFamily_constructPath(rf_patches/rf_patch_cpe_multi_protocol.h)
#include <ti/drivers/rf/RF.h>
/*---------------------------------------------------------------------------*/
#include "prop-settings.h"
/*---------------------------------------------------------------------------*/
/* TI-RTOS RF Mode Object */
RF_Mode rf_prop_mode =
{ .rfMode = RF_MODE_AUTO,
.cpePatchFxn = &rf_patch_cpe_multi_protocol,
.mcePatchFxn = 0,
.rfePatchFxn = 0,
};
/*---------------------------------------------------------------------------*/
#if defined(DEVICE_CC1312R) || defined(DEVICE_CC1352R)
/* Overrides for CMD_PROP_RADIO_DIV_SETUP */
uint32_t rf_prop_overrides[] CC_ALIGN(4) =
{ // override_prop_common.xml
// DC/DC regulator: In Tx, use DCDCCTL5[3:0]=0x7 (DITHER_EN=0 and IPEAK=7).
(uint32_t)0x00F788D3,
// override_tc106.xml
// Tx: Configure PA ramp time, PACTL2.RC=0x3 (in ADI0, set PACTL2[4:3]=0x3)
ADI_2HALFREG_OVERRIDE(0,16,0x8,0x8,17,0x1,0x1),
// Rx: Set AGC reference level to 0x1A (default: 0x2E)
HW_REG_OVERRIDE(0x609C,0x001A),
// Rx: Set RSSI offset to adjust reported RSSI by -1 dB (default: -2), trimmed for external bias and differential configuration
(uint32_t)0x000188A3,
// Rx: Set anti-aliasing filter bandwidth to 0xD (in ADI0, set IFAMPCTL3[7:4]=0xD)
ADI_HALFREG_OVERRIDE(0,61,0xF,0xD),
// Tx: Set wait time before turning off ramp to 0x1A (default: 0x1F)
HW_REG_OVERRIDE(0x6028,0x001A),
#if RF_TXPOWER_BOOST_MODE
// TX power override
// Tx: Set PA trim to max to maximize its output power (in ADI0, set PACTL0=0xF8)
ADI_REG_OVERRIDE(0,12,0xF8),
#endif
(uint32_t)0xFFFFFFFF,
};
/*---------------------------------------------------------------------------*/
/* CMD_PROP_RADIO_DIV_SETUP: Proprietary Mode Radio Setup Command for All Frequency Bands */
rfc_CMD_PROP_RADIO_DIV_SETUP_t rf_cmd_prop_radio_div_setup =
{ .commandNo = CMD_PROP_RADIO_DIV_SETUP,
.status = IDLE,
.pNextOp = 0,
.startTime = 0x00000000,
.startTrigger.triggerType = TRIG_NOW,
.startTrigger.bEnaCmd = 0x0,
.startTrigger.triggerNo = 0x0,
.startTrigger.pastTrig = 0x0,
.condition.rule = COND_NEVER,
.condition.nSkip = 0x0,
.modulation.modType = 0x1,
.modulation.deviation = 0x64,
.modulation.deviationStepSz = 0x0,
.symbolRate.preScale = 0xF,
.symbolRate.rateWord = 0x8000,
.symbolRate.decimMode = 0x0,
.rxBw = 0x52,
.preamConf.nPreamBytes = 0x7,
#if 1 // original code
.preamConf.preamMode = 0x0,
#else // INSCOBI Mode
.preamConf.preamMode = 0x1, // 1312R Radio
#endif
.formatConf.nSwBits = 0x10, // trace code for RF.Setting(sync word length 0x18:24, 0x10:16)
.formatConf.bBitReversal = 0x0,
.formatConf.bMsbFirst = 0x1,
.formatConf.fecMode = 0x0,
.formatConf.whitenMode = 0x7,
.config.frontEndMode = 0x0, /* set by driver */
.config.biasMode = 0x0, /* set by driver */
.config.analogCfgMode = 0x0,
.config.bNoFsPowerUp = 0x0,
.txPower = 0xCC14, /* set by driver */
.pRegOverride = rf_prop_overrides,
.centerFreq = 0x0393, /* set by driver */
.intFreq = 0x8000, /* set by driver */
.loDivider = 0x05, /* set by driver */
};
#endif /* defined(DEVICE_CC1312R) || defined(DEVICE_CC1352R) */
/*---------------------------------------------------------------------------*/
#if defined(DEVICE_CC1352P)
/* Overrides for CMD_PROP_RADIO_DIV_SETUP with high PA */
uint32_t rf_prop_overrides[] CC_ALIGN(4) =
{ // override_tc706.xml
// Tx: Configure PA ramp time, PACTL2.RC=0x3 (in ADI0, set PACTL2[4:3]=0x3)
ADI_2HALFREG_OVERRIDE(0,16,0x8,0x8,17,0x1,0x1),
// Rx: Set AGC reference level to 0x1A (default: 0x2E)
HW_REG_OVERRIDE(0x609C,0x001A),
// Rx: Set RSSI offset to adjust reported RSSI by -1 dB (default: -2), trimmed for external bias and differential configuration
(uint32_t)0x000188A3,
// Rx: Set anti-aliasing filter bandwidth to 0xD (in ADI0, set IFAMPCTL3[7:4]=0xD)
ADI_HALFREG_OVERRIDE(0,61,0xF,0xD),
// override_prop_common.xml
// DC/DC regulator: In Tx with 14 dBm PA setting, use DCDCCTL5[3:0]=0xF (DITHER_EN=1 and IPEAK=7). In Rx, use default settings.
(uint32_t)0x00F788D3,
#if RF_TXPOWER_BOOST_MODE
// TX power override
// Tx: Set PA trim to max to maximize its output power (in ADI0, set PACTL0=0xF8)
ADI_REG_OVERRIDE(0,12,0xF8),
#endif
(uint32_t)0xFFFFFFFF,
};
/*---------------------------------------------------------------------------*/
/* Overrides for CMD_PROP_RADIO_DIV_SETUP with defualt PA */
uint32_t rf_prop_overrides_tx_std[] CC_ALIGN(4) =
{ // The TX Power element should always be the first in the list
TX_STD_POWER_OVERRIDE(0xB224),
// The ANADIV radio parameter based on the LO divider (0) and front-end (0) settings
(uint32_t)0x11310703,
// override_phy_tx_pa_ramp_genfsk_std.xml
// Tx: Configure PA ramping, set wait time before turning off (0x1A ticks of 16/24 us = 17.3 us).
HW_REG_OVERRIDE(0x6028,0x001A),
(uint32_t)0xFFFFFFFF
};
/*---------------------------------------------------------------------------*/
/* Overrides for CMD_PROP_RADIO_DIV_SETUP with defualt PA */
uint32_t rf_prop_overrides_tx_20[] CC_ALIGN(4) =
{ // The TX Power element should always be the first in the list
TX20_POWER_OVERRIDE(0x001B8ED2),
// The ANADIV radio parameter based on the LO divider (0) and front-end (0) settings
(uint32_t)0x11C10703,
// override_phy_tx_pa_ramp_genfsk_hpa.xml
// Tx: Configure PA ramping, set wait time before turning off (0x1F ticks of 16/24 us = 20.3 us).
HW_REG_OVERRIDE(0x6028,0x001F),
(uint32_t)0xFFFFFFFF
};
/*---------------------------------------------------------------------------*/
/* CMD_PROP_RADIO_DIV_SETUP: Proprietary Mode Radio Setup Command for All Frequency Bands */
rfc_CMD_PROP_RADIO_DIV_SETUP_PA_t rf_cmd_prop_radio_div_setup =
{ .commandNo = 0x3807,
.status = IDLE,
.pNextOp = 0,
.startTime = 0x00000000,
.startTrigger.triggerType = TRIG_NOW,
.startTrigger.bEnaCmd = 0x0,
.startTrigger.triggerNo = 0x0,
.startTrigger.pastTrig = 0x0,
.condition.rule = COND_NEVER,
.condition.nSkip = 0x0,
.modulation.modType = 0x1,
.modulation.deviation = 0x64,
.modulation.deviationStepSz = 0x0,
.symbolRate.preScale = 0xF,
.symbolRate.rateWord = 0x8000,
.symbolRate.decimMode = 0x0,
.rxBw = 0x52,
.preamConf.nPreamBytes = 0x7,
.preamConf.preamMode = 0x0,
.formatConf.nSwBits = 0x18,
.formatConf.bBitReversal = 0x0,
.formatConf.bMsbFirst = 0x1,
.formatConf.fecMode = 0x0,
.formatConf.whitenMode = 0x7,
.config.frontEndMode = 0x0, /* set by driver */
.config.biasMode = 0x0, /* set by driver */
.config.analogCfgMode = 0x0,
.config.bNoFsPowerUp = 0x0,
.txPower = 0xB224, /* set by driver */
.pRegOverride = rf_prop_overrides,
.centerFreq = 0x0393, /* set by driver */
.intFreq = 0x8000, /* set by driver */
.loDivider = 0x05, /* set by driver */
.pRegOverrideTxStd = rf_prop_overrides_tx_std,
.pRegOverrideTx20 = rf_prop_overrides_tx_20,
};
#endif /* defined(DEVICE_CC1352P) */
/*---------------------------------------------------------------------------*/
/* CMD_FS: Frequency Synthesizer Programming Command */
rfc_CMD_FS_t rf_cmd_prop_fs =
{ .commandNo = CMD_FS,
.status = IDLE,
.pNextOp = 0,
.startTime = 0x00000000,
.startTrigger.triggerType = TRIG_NOW,
.startTrigger.bEnaCmd = 0x0,
.startTrigger.triggerNo = 0x0,
.startTrigger.pastTrig = 0x0,
.condition.rule = COND_NEVER,
.condition.nSkip = 0x0,
.frequency = 0x0393, /* set by driver */
.fractFreq = 0x0000, /* set by driver */
.synthConf.bTxMode = 0x0,
.synthConf.refFreq = 0x0,
.__dummy0 = 0x00,
.__dummy1 = 0x00,
.__dummy2 = 0x00,
.__dummy3 = 0x0000,
};
/*---------------------------------------------------------------------------*/
/* CMD_PROP_TX_ADV: Proprietary Mode Advanced Transmit Command */
rfc_CMD_PROP_TX_ADV_t rf_cmd_prop_tx_adv =
{ .commandNo = CMD_PROP_TX_ADV,
.status = IDLE,
.pNextOp = 0,
.startTime = 0x00000000,
.startTrigger.triggerType = TRIG_NOW,
.startTrigger.bEnaCmd = 0x0,
.startTrigger.triggerNo = 0x0,
.startTrigger.pastTrig = 0x0,
.condition.rule = COND_NEVER,
.condition.nSkip = 0x0,
.pktConf.bFsOff = 0x0,
.pktConf.bUseCrc = 0x1,
.pktConf.bCrcIncSw = 0x0,
.pktConf.bCrcIncHdr = 0x0,
.numHdrBits = 0x10,
.pktLen = 0x0, /* set by driver */
.startConf.bExtTxTrig = 0x0,
.startConf.inputMode = 0x0,
.startConf.source = 0x0,
.preTrigger.triggerType = TRIG_REL_START,
.preTrigger.bEnaCmd = 0x0,
.preTrigger.triggerNo = 0x0,
.preTrigger.pastTrig = 0x1,
.preTime = 0x00000000,
.syncWord = 0x0055904E,
.pPkt = 0, /* set by driver */
};
/*---------------------------------------------------------------------------*/
/* CMD_PROP_RX_ADV: Proprietary Mode Advanced Receive Command */
rfc_CMD_PROP_RX_ADV_t rf_cmd_prop_rx_adv =
{ .commandNo = CMD_PROP_RX_ADV,
.status = IDLE,
.pNextOp = 0,
.startTime = 0x00000000,
.startTrigger.triggerType = TRIG_NOW,
.startTrigger.bEnaCmd = 0x0,
.startTrigger.triggerNo = 0x0,
.startTrigger.pastTrig = 0x0,
.condition.rule = COND_NEVER,
.condition.nSkip = 0x0,
.pktConf.bFsOff = 0x0,
.pktConf.bRepeatOk = 0x1,
.pktConf.bRepeatNok = 0x1,
.pktConf.bUseCrc = 0x1,
.pktConf.bCrcIncSw = 0x0,
.pktConf.bCrcIncHdr = 0x0,
.pktConf.endType = 0x0,
.pktConf.filterOp = 0x1,
.rxConf.bAutoFlushIgnored = 0x1,
.rxConf.bAutoFlushCrcErr = 0x1,
.rxConf.bIncludeHdr = 0x0,
.rxConf.bIncludeCrc = 0x0,
.rxConf.bAppendRssi = 0x1,
.rxConf.bAppendTimestamp = 0x0,
.rxConf.bAppendStatus = 0x1,
.syncWord0 = 0x0055904E,
.syncWord1 = 0x00000000,
.maxPktLen = 0x0, /* set by driver */
.hdrConf.numHdrBits = 0x10,
.hdrConf.lenPos = 0x0,
.hdrConf.numLenBits = 0x0B,
.addrConf.addrType = 0x0,
.addrConf.addrSize = 0x0,
.addrConf.addrPos = 0x0,
.addrConf.numAddr = 0x0,
.lenOffset = 0xFC,
.endTrigger.triggerType = TRIG_NEVER,
.endTrigger.bEnaCmd = 0x0,
.endTrigger.triggerNo = 0x0,
.endTrigger.pastTrig = 0x0,
.endTime = 0x00000000,
.pAddr = 0, /* set by driver */
.pQueue = 0, /* set by driver */
.pOutput = 0, /* set by driver */
};
/*---------------------------------------------------------------------------*/
Hi David,
the rise in the side lobes could be caused by the ramp up and ramp down of the PA during packet transmission.
Could you test using a continuous modulated signal on both devices?
In order to transmit a continuous modulated signal you need to use rfc_CMD_TX_TEST_t instead of rfc_CMD_PROP_TX_ADV_t
// CMD_TX_TEST
// Transmitter Test Command
rfc_CMD_TX_TEST_t RF_cmdTxTest =
{
.commandNo = 0x0808,
.status = 0x0000,
.pNextOp = 0, // INSERT APPLICABLE POINTER: (uint8_t*)&xxx
.startTime = 0x00000000,
.startTrigger.triggerType = 0x0,
.startTrigger.bEnaCmd = 0x0,
.startTrigger.triggerNo = 0x0,
.startTrigger.pastTrig = 0x0,
.condition.rule = 0x1,
.condition.nSkip = 0x0,
.config.bUseCw = 0x0,
.config.bFsOff = 0x1,
.config.whitenMode = 0x2,
.__dummy0 = 0x00,
.txWord = 0xAAAA,
.__dummy1 = 0x00,
.endTrigger.triggerType = 0x1,
.endTrigger.bEnaCmd = 0x0,
.endTrigger.triggerNo = 0x0,
.endTrigger.pastTrig = 0x0,
.syncWord = 0x0055904E,
.endTime = 0x00000000
};