GE MDS SD Series, Справочное руководство

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MDS 05-4846A01, Rev. C SD Series Ref. Manual (Packet & Transparent Mode) 81
4. To dekey the radio, select
Key Radio
again and use the spacebar to set
the field at the right to
OFF
. Press the key to apply the change.
Figure 63. RF Keying Test Menu
(
Maintenance/Tools Menu>>Radio Test Menu>>RF Keying Test Menu
)
Using the Built-in
Spectrum Analyzer
A unique feature of the transceiver is the ability to view the RF spectrum
above and below the operating frequency using its built-in Spectrum
Analyzer. Often, this can assist you in diagnosing the cause of interfer-
ence, or to view other signals near your operating frequency.
To use the Spectrum Analyzer, you must first specify a center frequency
and a span frequency . The center frequency is the frequency that you
wish the spectrum analysis display to be centered on. The span fre-
quency defines the width of the overall spectrum to be examined.
Follow these steps to use the spectrum analyzer:
1. Select
Spectrum
from the RF Test Menu to bring up the Spectrum
Analyzer screen (Figure 64).
2. Select
Center Frequency
from the menu. The field to the right clears
and presents a flashing cursor.
3. Enter the frequency that you wish the spectral analysis to be cen-
tered on. Press the key to apply the change.
4. Select
Span Frequency
from the menu. The field to the right clears
and presents a flashing cursor.
5. Enter the frequency range that you wish to examine. Press the
key to apply the change.
ENTER
ENTER
ENTER