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IMI
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SW71122
MLX71122 RF Receiver
Programming Software Manual
39011 71122 01
Page 19 of 21
SW71122-Manual
Rev. 004
Aug/11
5.4.13 LO1
The frame
Injection Side
defines the injection side of the LO signals into the mixers. At high side injection
the LO signal has a higher frequency than the other input signal of the mixer and vice versa. The
LO1
value
is only used for calculation reasons since it has no effect on the register settings. On the other hand it has
much impact on the required LO1 frequency. Default value is high. The effect of the
LO1
setting can be
observed in the
Tuning Info
frame (see figure in section 4.4).
5.4.14 LO2
Since mixer 2 is an image rejection mixer, we can select the right mixing product by selecting the right injec-
tion side for
LO2
. Default value is high. The effect of the
LO2
setting can be observed in the
Tuning Info
frame (see figure in section 4.4).
5.4.15 LO2DIV
These radio buttons specify the divider ratio by that the LO2 frequency is lower than the LO1 frequency. LO1
is injected into mixer 1 and LO2 is injected into mixer 2.
5.5 Register Set - Tab
The
Register Set
tab gives an overview of all actual control word registers of the IC (see Data Sheet
section 4). Registers R0 to R7 with all their bits are displayed from top to bottom. The most significant bits are
on the left hand side. Red fields mean the bit is high, blue fields mean the bit is low. For ease of use the cor-
responding word value in hexadecimal notation is shown on the right hand side of each control word.
Single bits can be manipulated in this tab. If the mouse pointer is moved over a field, then the bit name will be
displayed in the status field at the bottom of the dialog window and directly at the location of the mouse
pointer. A single click on a bit field toggles the state of this bit between low and high.
