Nautel XR6, Operation And Maintenance Manual

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XR6/XR3 Operations and Maintenance Manual Operating the transmitter
Issue 3.1 2013-03-14 Page 2-27
2. Use the
Up
and
Down
buttons to select the appropriate
Recon.
(reconnect) level, noting it is
in the right-hand
B+Thresholds
column. Press the
Edit
button, then press the
Up
and
Down
buttons, to adjust the threshold (in volts) as desired. Press the
Save
button to save your
calibration. (Pressing the
Cancel
button discards your changes.)
Calibrate B+ switching points.
The XR6/XR3 transmitter uses multiple B+ voltage levels [0
(low) and 3 (high) for three-phase XR3s; 0 (low), 2 (medium) and 3 (high) for three-phase XR6; four
levels (0, 1, 2 and 3) for single-phase XR3s and XR6s] to optimize transmitter performance. These
levels are automatically switched as pre-defined minimum and maximum limits are reached. If
required, you can use the
Calibrate Switching Points
page ( Figure 2.20 or Figure 2.21 ) to adjust the
limits used to determine the B+ switching points.
The
Carrier Ref
value represents the current value. It is relative to the
Minimum
and
Maximum Car.
Ref. Limit
values.
The
PDM A
and
B
values represent the current duty cycle of the PDM drive signal. B+ switching
typically occurs at a duty cycle of approximately 40%.
To recalibrate the B+ switching points, perform the following steps (see Figure 2.20 or Figure 2.21 ):
1. Use the
Up
and
Down
buttons to select the appropriate
Minimum
level, noting it is in the
left-hand
Car. Ref. Limit
column. Press the
Edit
button, then press the
Up
and
Down
buttons, to adjust the threshold value as desired. Press the
Save
button to save your
calibration. (Pressing the
Cancel
button discards your changes.)
2. Use the
Up
and
Down
buttons to select the appropriate
Maximum
level, noting it is in the
right-hand
Car. Ref. Limit
column. Press the
Edit
button, then press the
Up
and
Down
buttons, to adjust the threshold value as desired. Press the
Save
button to save your
calibration. (Pressing the
Cancel
button discards your changes.)
Setting high power lockout limit
You can set the high power limit for the high power lockout feature using the
High Power Lockout
page.
To view the
High Power Lockout
page, select
Settings
from the
MAINMENU
page. Next, select
Hardware Settings
from the General Settings menu , then select
High Power Lockout
from the
Hardware Settings menu .