rfw102 ETC-unknow, rfw102 Datasheet - Page 11

• Manufacturer Part Number: rfw102
• Description: Rfw102 Transceiver Chipset Shortrang
• Manufacturer: ETC-unknow

Datasheet
October 2002
Rev. 1.03
Transmission Link
Pulse Generator
The pulse generator is the element which is in charge of generating an approximately 76ns IF pulse that
shall interrogate the SAW correlator. It is a state machine with a timing mechanism that switches on and off
the relevant analog units that generate the pulse. The output stage is a non-differential power amplifier,
matched to push maximum power to the SAW 200Ω input.
The interrogating pulse has a ramp up-ramp down envelope, to lower the spectral density of side bands.
RF Front End
The RF Front End is the final stage of amplification and up-conversion prior to feeding the antenna. Its input
is the 13-bit BPSK series that is the output signal of the correlator in an intermediate frequency of 488MHz,
and its output is the same signal amplified by 40dB and up-converted to 2440HMz. The 1
amplification is in the IF, and the 2
rejections.
© 2002, RFWaves LTD.
Differential
Output
Non
DATA In
Figure 8: A Block Diagram of the Frequency Generation Sub-System
SAW interface
DATA In
488MHz
t
su1
Resonator
488MHz
SAW
Pulse Generation State Machine
Figure 9: Pulse Generator Block Diagram
Figure 10: RF Front End Block Diagram
frequency generation sub-
nd
30nSecs
is in the RF. The mixer is an image rejection mixer, with at least 35dB
IF Amplifier
system
RF Front End
16nSecs
1952MHz
Pulse
SWcont
X4
30nSecs
PA
SAW Amp
Power Control
RFW102 ISM Transceiver Chipset
1952MHz
488MH z
Block
Vcc
Antenna interface
t
t
Vout
Non-Differential
Output
st
stage of
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