Atec Rohde-Schwarz-EB500 - Manual (Page 7)

Rohde & Schwarz R&S®EB500 Monitoring Receiver 7
Monitoring of a large number of radio services
with different scan modes
In the frequency scan mode, a user­defined frequency
range is scanned using fixed channel spacing. The receiver
steps through the frequency range of interest and checks
every channel for occupancy. If a signal is detected with
a level exceeding the predefined threshold, the receiver
dwells at the corresponding frequency for the set hold
time, allowing for the signal to be demodulated and pro­
cessed. In the case of analog modulation, the demodu­
lated signal can be monitored via the headphones or
loudspeaker.
In the memory scan mode, predefined channels stored in
memory locations are consecutively scanned and analyzed
to see if any signals are present. The R&S®EB500 offers
10 000 user­definable memory locations. Receive param­
eters can be assigned separately to each memory location.
The memory scan mode is particularly useful for scanning
individual frequencies that do not have a fixed channel
spacing or that use different demodulation modes and
bandwidths. The memory scan mode offers users a
greater degree of freedom than the frequency scan mode
in similar applications.
Monitoring of
user-specific radio
services
Smooth operation of an organization’s own radio network is vital to ensure
operational readiness — not only for government operators.
The frequency scan mode is mainly intended for
monitoring radio services that use fixed channel
spacing as compared to memory scan that is used
for variable channel spacing.