Nautel NV7.5, Руководство по эксплуатации и обслуживанию

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NV10/NV7.5 Operations and Maintenance Manual Operating the transmitter
Issue 3.4 2016-08-03 Page 2-53
Understanding the preset tabs
The
Presets
page consists of tabs across the top with functions on the left-side and parameters
displayed in the center and right-side of the window. A separate display appears for each of the
following tabs:
General
- (
see
Figure 2.34 on page 2-50
)
•
Preset Name
This field identifies the current preset settings. Users must load a
preset to directly edit this field (see Activating Presets on page 2-52 ).
•
Output Power
Set the output power level (in kW). Output power limits are a
function of the transmitter mode of operation (see Table 1-1 of the
Pre-Installation Manual for RF output power ratings for this trans-
mitter).
•
Frequency
Set value. Valid frequencies are between 87.00 and 108.00 MHz.
•
Mode
Set the overall transmission mode. Available options are:
– FM:
an analogue only mode, transmits a carrier, frequency
modulated with audio.
– HD:
all digital mode; this mode transmits the upper and lower digital
sidebands of OFDM IBOC carriers. HD transmitter is typically high-
level combined (coupler or spatial) with a paired FM only
transmitter. See page 2-54 for additional calibration settings. This
mode requires additional hardware.
– FM+HD:
also known as hybrid/simulcast or low-level combined,
this mode transmits the analog carrier (FM modulated) and the upper
and lower digital sidebands of OFDM IBOC carriers. See page 2-54
for additional calibration settings. This mode requires additional
hardware.
– DRM+:
transmits a DRM OFDM signal using the I/Q stream from a
DRM modulator connected to the desired AES input. See page 2-54
for additional calibration settings. This mode requires additional
hardware.
Note:
Settings on the Presets tabs are shown/hidden based on the chosen settings. Not all
settings are available in all modes.