Nautel NV7.5, Руководство по эксплуатации и обслуживанию

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NV10/NV7.5 Operations and Maintenance Manual Operating the transmitter
Page 2-34 Issue 3.4 2016-08-03
Use the left and right buttons to make fine adjustments.
Use the maximize or minimize buttons as required.
Use the “peak” button to place the cursor on the next successive peak (moving left to right) in
the spectrum.
Use the “cog” button to gain access to spectrum settings (see Figure 2.21 ) such as:
•
Resolution Bandwidth:
determines the FFT bin size or the smallest frequency that can
be resolved. Allowable range is 75 - 10,000 Hz. Default setting is 1000 Hz.
•
Span
: determines the start and stop frequencies of the analyzer with the carrier fre-
quency always at the center. Allowable range is 10 - 1200 kHz. Default setting is 1000
kHz.
•
Averages
: determines the number of averages that the analyzer performs per sweep.
Press the
Clear Averaging
button to restart the averaging process. Allowable range is 0
- 100 kHz. Default setting is 19.
•
Measurement Source
: determines the source of the spectrum plot (transmitter output,
audio analyzer, etc.) that is being displayed. Selecting
TX Output
uses the exciter’s RF
sample feedback signal to display the RF output spectrum. Selecting
Internal (Post EQ)
displays the signal that will be produced by the exciter. Selecting
Internal
(FM) uses the
exciter’s RF signal, before being equalized (if applicable). Selecting
MPX
shows the
composite baseband signal.