CC2530: How to change the channel of zigbee commucation dynamically?

Yes I still use TIMAC v1.5.2 SDK.
I need to change the channel for FCC certification.

The coordinator have to make the frequency without EndDevice according to FCC.
But no detect coordinator frequency without EndDevice on spectrum analyzer.
It can be detected frequency with EndDevice.

The MAC Sample Application Coordinator does change set the channel dynamically as a static channel is selected for End Devices to find and join.  Network settings such as the channel are stored in non-volatile memory to be recovered after device resets and there is no frequency hopping mechanism for 2.4 GHz IEEE solutions.  The Coordinator has no reason to send radio packets without connected End Devices.  Unless you would like to consider using the Pan Coordinator in beacon mode?  See the MAC Sample Application Software Design for this and other details concerning application capabilities.

Most FCC certifications I've been involved with previously allow other firmware to be evaluated so long as the same IEEE PHY radio is used.  Thus you could consider these other options:

• Smart RF Studio 7 (requires JTAG connection)
• MAC CoProcessor firmware (requires UART transport layer)
• Basic RF Software Examples

Regards,
Ryan

if use Basic RF Software Examples , The coordinator can make the signal without EndDevice?

The Basic RF Software Examples do not consider network settings or stored information about connected devices, thus transmissions will be sent unimpeded.

Regards,
Ryan

In summary,
Modify the basic RF software example to dynamically change channels. Then the coordinator can transmit signals without a device.
You can check it in smartRFstudio.
Is this what you mean?

// lightSwitch.c in  the basic RF software example
#define RF_CHANNEL 25 // 2.4 GHz RF channel

The value of 2400 MHz is 25.

if I want to set to 2435 MHz, what is the value?

The appLight() of the basicRF Sample  didn't make signal without appSwitch() same as TIMAC .

I have checked no signal by smartRFstudio.

See the source code of appLight().

There is no source for basicRfSendPacket(), which exists in appSwitch().

static void appLight()
{
    halLcdWriteLine(HAL_LCD_LINE_1, "Light");
    halLcdWriteLine(HAL_LCD_LINE_2, "Ready");
#ifdef ASSY_EXP4618_CC2420
    halLcdClearLine(1);
    halLcdWriteSymbol(HAL_LCD_SYMBOL_RX, 1);
#endif

    // Initialize BasicRF
    basicRfConfig.myAddr = LIGHT_ADDR;
    if(basicRfInit(&basicRfConfig)==FAILED) {
      HAL_ASSERT(FALSE);
    }
    basicRfReceiveOn();

    // Main loop
    while (TRUE) {
        while(!basicRfPacketIsReady());

        if(basicRfReceive(pRxData, APP_PAYLOAD_LENGTH, NULL)>0) {
            if(pRxData[0] == LIGHT_TOGGLE_CMD) {
                halLedToggle(1);
            }
        }
    }
}

I don't fully understand the issue you're experiencing.  The appSwitch is designed to send packets to appLight, not the other way around.  Modifications will be necessary to generate the correct solution in accordance with your needs.  The source of basicRfSendPacket is contained in basic_rf.c

Regards,
Ryan