MDS 05-4846A01, Rev. F
SD Series Technical Manual
75
RF Keying Test
The RF Keying Test screen provides a way to place the transmitter on
the air to check the measured RF power output, measure reflected power
from an antenna system, or to provide a signal at a receiving station so
that RSSI can be checked.
•
Key Radio
—Set to
ON
to enable the RF keying test;
OFF
to disable
it. The Commit Configuration button must be clicked to apply the
setting.
•
Measured RF Power
—Provides an indication (in dBm) of the mea-
sured power output of the transmitter.
Spectrum Graph
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
Graph. Often, this can assist in diagnosing the cause of interference, or
to view other signals near your operating frequency.
To use the Spectrum Graph, you must first specify a
center frequency
and a
span frequency
. The center frequency is the frequency that you
wish the spectrum display to be centered on. The span frequency defines
the width of the overall spectrum to be examined.
•
Center Frequency
—The frequency (in MHz) that the graph will be
centered on.
•
Span Frequency
—Width (in kHz) of the spectrum to be examined.
A sample spectrum graph from the transceiver is shown below.
Example Spectrum Graph
