Encoding Monitor
Operations Manual
Document # 1050-1081
Rev. J
2007 Arbitron Inc
10
If the engineer cannot always visually monitor the MONITOR front panel, the engineer
can use the rear panel ALARM connection. This connection provides both a normally
open and normally closed relays which will energize when indicating a loss of encoding.
This connection can be made externally to either an audible or visual indicator, or both.
It is highly recommended that the monitor’s ALARM connection should be used in
conjunction with your station’s current Air Fault Alarm system (or similar).
Provision has also been made for connection to a remote monitor device via RS232. See
below for specification of connection to both the ALARM and RS232 connections.
Note: The MONITOR has been configured with a nominal alarm delay of approximately
3 minutes. In other words, the MONITOR will not assert an alarm condition until it fails
to detect the specified code for approximately 3 minutes. At that time, the alarm relay
will close (or open), the LED will turn RED, and a statement will be issued via the RS232
connection. When an encoded signal is applied to the input, the MONITOR will release
the alarm condition immediately. Please see below for information on the specifics of the
alarm assertion.
