User Guide
UG-1283
Rev. A | Page 15 of 24
Tx CONTROL TAB
The
Tx Control
tab (see Figure 28) allows the user to set the
gain and phase of each of the four transmit channels.
To use the
Tx Control
tab, take the following steps:
1.
Click
Tx Initalise
.
2.
Select the
Attenuation
check box for each channel to add
or remove the 15 dB step attenuation.
3.
Adjust the
Gain Index
and
Phase Angle (°)
settings of
each channel using the corresponding dropdown menus.
4.
When adjustments are made, click
Load All
to write the
settings to the device registers.
TX REGISTERS TAB
The
TX Registers
tab provides control for all transmit function
registers in the device (see Figure 29).
In the
Tx Gain Control
section, set the gain register for each
transmit channel.
In the
Tx Phase Control
section, set the
I
and
Q
gain registers,
as well as polarity bits for each channel in the corresponding
vector modulator (VM).
In the
Memory Index
section, if the
SPI Ctrl
check box is
selected, the beam position settings for the corresponding
channel are recalled from memory into the channel work
registers, according to the value (the memory address) in the
TX CH1 RAM INDEX
to
TX CH4 RAM INDEX
fields for
each channel. If the
SPI Ctrl
check box under
TX CHX RAM
INDEX
is selected, data for all four channels are pulled
according to the value in the
TX CHX RAM INDEX
field.
In the
Bias Current
section, choose a bias setting for each of the
three transmit stages (the settings are common to all four
transmit channels).
Click
Write Gain Values
,
Write Phase Values
, and
Write
Memory Values
to send the corresponding bias register setting
to the ADAR1000-EVALZ.
167
88
-006
Figure 28.
Tx Control
Tab
16
788
-00
7
Figure 29.
TX Registers
Tab
