Sundance SMT349 - Manual (Page 23)

Version 2.1 Page 23 of 32 SMT349 User Manual
12.4.3 Transceiver2 Register – 0x2.
Any value written in this register can be read-back to check that the Comport used
works properly.
Transceiver2 Register – 0x2
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
2 Reserved Tx/Rx Switch
Default Reserved ‘00’
1 Reserved Attenuation Receiver RF Attenuation Receiver IF
Default ‘0’ ‘11111’ ‘11’
0 Attenuation Receiver IF Attenuation Transmitter
Default ‘111’ ‘11111’
Transceiver2 Register – 0x2
Setting
Bit14…10
(Rx/RF)
Bit9…5 (Rx/IF)
Bit4…0 (Tx)
Attenuation (Receiver RF/IF and Transmitter)
‘00000’ No attenuation (Min).
‘00001’ 1 dB attenuation.
‘00010’ 2 dB attenuation.
… …
‘11111’ 31 dB attenuation (Max).
Transceiver2 Register – 0x2
Setting
TX/Rx Switch
Bit17…16
Tx/Rx Switch
‘11’ Tx and Rx OFF
‘10’ Tx ON and Rx OFF
‘01’ Tx OFF and Rx ON
‘00’ Tx and Rx OFF
Both Attenuations (Receiver and Transmitter) are coded on 5 bits (binary).