Sundance SMT349 User 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).