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Davicom FMBM, Reference Manual, March 2015
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If the FMBM was not connected or had not been detected by the Davicom, a message at the
top of the window would have indicated that no FMBM was detected.
FMBM drop-down list
The Davicom can accommodate up to 4 FMBM units which are selected through the FMBM
drop-down list.
Auto Read
Checking the Auto Read box ensures that the readings displayed in the AM/FM Broadcast
Monitor screen are automatically refreshed every time a different unit is selected from the
FMBM drop-down list. Otherwise, the Read button must be pressed to refresh the display
with the latest readings from the corresponding FMBM.
Read & Write
Clicking on these buttons reads the data from the FMBM, or writes data to the FMBM
following any changes made in the configuration screen. The Write operation is necessary
because changes made to the settings displayed on the screen are only present in your PC
and aren’t transferred to the connected FMBM until the Write button is pressed.
Descriptions (Default and Alternate)
These descriptions are used to identify the FMBM whenever alarms are sent or events are
logged in the Davicom unit’s System Log. The Default description is in Unicode and can
accommodate any compatible international alphabet. The Alternate description is in ASCII
and is generally used for an English description.
The Davicom automatically copies the
Default into the Alternate description if the Alternate field is empty and if the language is
ASCII compatible.
Band
The operating frequency band is selected with the Band drop-down list
The operating frequency is set in the Frequency field. For AM, it can be set from 520 to 1710
kHz and for FM it can be set from 88 to 108 MHz.
Note that the actual frequency isn’t
transferred to the FMBM until the Write button is pressed.
Received Signal Strength Indicator (RSSI)
The Low Limit field indicates the number of dB below the Normal Level at which the RSSI
Alarm will be set. The Normal Level is set on-site with the FMBM’s front-panel screen and
Menu buttons. Whenever the RSSI alarm turns on, the MAC’s 1FM01 flag will become true.
This flag can then be used in the Davicom’s logic structure with Virtual Logic Gates to perform
different actions and send alarms.
