STS1TX datasheet(35/70 Pages) STMICROELECTRONICS

부품명	STS1TX

상세설명	Industrial monitoring and control

PDF	70 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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35 / 70 page

DocID025109 Rev 1

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STS1TX

Transmission and reception

The power ramping is enabled by the PA_RAMP_ENABLE bit. If enabled, the ramp starts

from the level defined by the word PA_LEVEL_0 and stops at the level defined by the word

PA_LEVEL_x, where x is the value of the 3-bit field PA_LEVEL_MAX_INDEX. So, a

maximum of 8 steps can be set up. Figure 7 describes the levels table and shows some

examples.

Each step is held for a time interval defined by the 2-bit field PA_RAMP_STEP_WIDTH. The

step width is expressed in terms of bit period units (Tb/8), maximum value is 3 (which means

4×Tb/8=Tb/2). Therefore the PA ramp may last up to 4 Tb (about 3.3 ms if the bit rate is 1.2

kbit/s).

Table 26. PA_level

PA_LEVEL_x

Comment

POUT [dBm]

(170MHz)

No output power: output stage in high impedance

mode and all circuits switched off.

Maximum output power

…

-6

…

Minimum level

-34

91-127

Reserved

N/A

STS1TX 데이터시트(PDF) 35 Page - STMicroelectronics