CMX980AL7 CML Microcircuits, CMX980AL7 Datasheet - Page 64

• Manufacturer Part Number: CMX980AL7
• Description: TETRA Baseband Processor
• Manufacturer: CML Microcircuits

TETRA Baseband Processor
Title:
Address:
Function:
Description:
7:0
7:4
3:0
7:0
7:4
3:0
Bit
1999 Consumer Microcircuits Limited
TxIGainLSB
TxIGainMSB
TxQGainLSB
TxQGainMSB
TxIQGainMult
Transmit I and Q channel Gain Multiplier registers
$0x42, $0x43 , $0x48 and $0x49 (4 locations)
RW
A 2s-complement multiplication is performed on the Tx I and Q data signals, using these 12-bit
2s-complement words as the respective multiplicands. This function may be considered as a
digital attenuator. This register sets the multiplier, the result being given by the formula:
Name
Address $0x42
Address $0x43
Address $0x48
Address $0x49
D
out
Data
Data
Data
Data
Active State
D
in
RW
RW
RW
RW
RW
RW
G
2
val
11
Least significant 8 bits of the TxIGain register (G
Reserved. Set these bits Low. Undefined on read.
Most significant 4 bits of the TxIGain register (G
Least significant 8 bits of the TxQGain register (G
Reserved. Set these bits Low. Undefined on read.
Most significant 4 bits of the TxQGain register (G
Where:
64
G
D
D
in
val
out
is the signal input,
is the signal output,
is the value in the register.
Function
val
val
val
).
val
).
).
).
CMX980A
D/980A/3