NV Series – Software Update Procedure
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IS09004D
Issue 1.1
(i) If necessary, proceed to
Exciter HD
Calibration
; if not, select the desired
preset or operating mode. Note that
for any FM+HD mode, the power level
displayed in the AUI’s Presets page is
the desired analog power setting
(TPO). The power reading at the top
of the home page is also the analog
portion of the FM+HD output.
(j) The procedure is complete. Nautel
recommends that you retain at the site
the new RF Drive Power Scale Factor
from step (h). Also, email the data to
Nautel ([email protected]).
(k) For future reference, if the NAPC156
Control Interface PWB requires
replacement, you will need to
manually re-enter the new RF Drive
Power Scale Factor after the original
factory EEPROM is loaded into the
replacement PWB.
6.2 Exciter HD Calibration
NOTE
This calibration procedure addresses all
IBOC modes (FM+HD and HD) of
operation.
(a) Operate the transmitter (
RF On
) in an
FM mode preset at the licensed
analog power level (or rated power),
with exciter A as active.
(b) Go to the AUI
Menu
/
Hardware
Configuration
/
HD Settings
screen.
(c) Press the
Calibrate
button next to
Exciter HD Power Calibration
.
(d) Almost immediately the Calibration
Value shall change from a nominal
1.000 to a value typically near or
between 0.900 and 1.100. Record the
calibration value.
(e) If exciter B is installed, manually
change over to exciter B (using the
AUI
Menu
/
Changeover
screen) and
repeat steps (b) through (d). When
complete, change over to exciter A
(making it active again).
(f) Proceed to paragraph 6.3,
LUT Re-
Saving
.
6.3 LUT Re-Saving
NOTE
This procedure applies to IBOC
transmitters only (FM+HD and HD).
LUT is an acronym for Look-Up Table.
(a) With RF Off and exciter A active, go to
the AUI
Menu
/
Hardware
Configuration
/
HD Settings
screen
and record the “Default LUT Height”
value. Exciter A and B have
independent “Default LUT Height”
values; the value displayed on the AUI
represents that value stored in the
active exciter.
(b) Go to the
AUI Menu / Hardware
Configuration / LUT Storage
screen
and record the stored Index details vs.
the Index # in the table, for example
Figure 1 shows index 1 having a
mode of FM+HD, a power of 3.65 kW,
a frequency of 98.1 MHz and it is
exciter A. The associated Preset will
also have this
LUT Index
# selected
under the
Other Audio Settings
sub-
menu. In this example, index 1 is the
only index to have a LUT stored. If
others were stored in exciter A, they
would appear under index 2, 3, etc.,
and may have different modes
(FM+HD or HD), power levels,
frequencies and even injection levels
(default is -20 dB if not shown). The
table shows the stored indexes for the
active exciter; exciter B indexes will
have \B at the end in place of \A and
there should exist an equivalent B
index for every A index (same index #
and description).
Summary of Contents for NV Series
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