[Elecraft] need translate 3 words

[Lyle Johnson]

> in the schematic of K2 ( control board ) there is the signal
>  "DAC2CS"    ???

DAC2 chip select: this is the signal that lets the PIC processor on the 
control board load values to U5 on the RF board, a digital-to-analog 
converter (DAC) which is used to change the frequency of the PLL 
reference oscillator.

>  " SDO "         ???

Serial data out: this is used to send the actual data to the DAC, or to 
other chips connected to the serial peripheral interface (SPI) bus.

>  " SCK "          signal clock ?

Serial clock: part of the SPI bus, this tells the chip when to accept a 
data bit on the SDO line.

73,

Lyle KK7P