Sundance SMT349 - Manual (Page 22)

Version 2.1 Page 22 of 32 SMT349 User Manual
12.4.2 Transceiver1 Register – 0x1.
Any value written in this register can be read-back to check that the Comport used
works properly.
Transceiver1 Register – 0x1
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’
Transceiver1 Register – 0x1
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).
Transceiver1 Register – 0x0
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
Attenuations (Receiver IR/RF and Transmitter) are coded on 5 bits (binary).