xe1202 ETC-unknow, xe1202 Datasheet - Page 11

• Manufacturer Part Number: xe1202
• Description: Low-power, Integrated Uhf Transceiver
• Manufacturer: ETC-unknow

4.1.5
The output power of the power amplifier is programmable on four values with the register “RTParam_Tpow” (see
the Configuration register section below), as shown in the table below, where RFOPi are given in Electrical
Specifications section
The type of modulation of the LO frequency by the modulating bit stream is programmable through
RTParam_Filter:
This is illustrated on the next page where DATAIN is the input bit stream to be transmitted.
11
-
-
the input bit stream is directly applied to the frequency synthesizer without any pre-filtering
(RTParam_Filter=0)
the input bit stream is pre-filtered before being applied to the frequency synthesizer; with this filtering, each
edge of the bit stream is linearly smoothed with a staircase transition (RTParam_Filter=1)
Transmitter
RTParam_FEI
RTParam_FEI
Demodulated
Demodulated
DataOut_FEI
DataOut_FEI
counter_out
counter_out
ffdemod_out
ffdemod_out
datain
datain
data
data
en
en
Figure 3 Time diagram of an FEI measurement when “RTParam_Fsel” = 0
(the number of transitions on “counter_out” is for illustration only)
RTParam_Tpow
0
0
0 0
0 1
1 0
1 1
BIT B0
BIT B0
X
X
BIT B0+1
BIT B0+1
Output power
RFOP10
RFOP20
RFOP1
RFOP2
TS_FE
TS_FE
BIT B0+2
BIT B0+2
BIT B0+3
BIT B0+3
BIT B0+4
BIT B0+4
Data Sheet
XE1202
N
N
N
N
D0211-105