CC2520: CC2520: How to enable Continuous Wave / Carrier Wave on the CC2520 for certification.

I've recently implemented Continuous Wave / Carrier Wave for certification purposes on the CC2530 using the MDMTEST1.MOD_IF register to output a single unmodulated tone.

I also need the same functionality on my IEEE802.15.4 access points, which are using the CC2520 radio.

However the CC2520 is missing any descriptions of the following registers in the datasheet:

MDMCTRL0.TX_IF   // Modulator outputs tone set by rfr_tx_tone.

MDMTEST1.MOD_IF // 1: A tone is transmitted with frequency set by MDMTEST0.TX_TONE.

MDMTEST0.TX_TONE

This is the current code I'm using. It outputs a modulated signal that sends zeros, instead of a unmodulated tone, so I think one of the 3 registers above is not implemented on the CC2520:

macRadioSetChannel( tst_Channel );

reg = macSpiReadReg(MDMTEST1);
reg |= MOD_IF;
macSpiWriteReg(MDMTEST1, reg);

macSpiWriteReg( MDMCTRL0, TX_IF);

reg = macSpiReadReg(FRMCTRL0);
reg |= TX_MODE_INFINITE_FIFO_TRANSM;
macSpiWriteReg(FRMCTRL0, reg);

MAC_RADIO_FLUSH_TX_FIFO();
MAC_RADIO_TX_ON();

while(1)
{
        MAC_RADIO_WRITE_TX_FIFO("\0\0\0\0\0\0\0\0\0\0", 10);
}

Is there any way to implement Continuous Wave / Carrier Wave on the CC2520 ?