Astro Spectra

Info on the Astro Spectra

This is for the Spectra CPS 174000000 MHz band edge in hex. Change it to 403A690D 225,000,000 MHz

0x0CCAAD0 0x0CCAAD4 0x0CCAAD8 0X0CCAB1C 0X0CCAB20 0x0CCAB18

0x0ccadf4

You can't do this on an old code plug, it needs to be read from the radio.

Codeplug notes

Use the mototools program to pull out the code plug.

Now you have the binary.

The frequency tuning points control the radio for when to switch the VCOs. I verified this by rewriting the Transmit 150 MHz one to 151 MHz and then tuning to 150 mhz in the radio and transmitting. This did not move the aux lines. At 151 mhz it switched the aux lines.

This means the CPU uses the frequency points as it's switch over points, so we can use that for changin it to 220.

The RX VCO has the same thing and I've moded it to 150 from 166.15 to verify.

The high RX and low TX range use the same VCO. This will be a problem for 220.

Rx Vco

The RX vco locks up to about 190-195 MHz

TX VCO

The TX VCO locks up to about 176. Step size was one mhz so it unlocked at 177 MHz. At 176, it made 120W still.

Perhaps the PA will work up to 220?