Goto Section: 11.31 | 11.33 | Table of Contents

FCC 11.32
Revised as of November 19, 2020
Goto Year:2020 | 2022
  §  11.32   EAS Encoder.

   (a) EAS Encoders must at a minimum be capable of encoding the EAS
   protocol described in § 11.31 and providing the EAS code transmission
   requirements described in § 11.51. EAS encoders must additionally
   provide the following minimum specifications:

   (1) Encoder programming. Access to encoder programming shall be
   protected by a lock or other security measures and be configured so
   that authorized personnel can readily select and program the EAS
   Encoder with Originator, Event and Location codes for either manual or
   automatic operation.

   (2) Inputs. The encoder shall have at least one input port used for
   audio messages and at least one input port used for data messages.

   (3) Outputs. The encoder shall have at least one audio output port and
   at least one data output port.

   (4) Calibration. EAS Encoders must provide a means to comply with the
   modulation levels required in § 11.51(f).

   (5) Day-Hour-Minute and Identification Stamps. The encoder shall affix
   the JJJHHMM and LLLLLLLL codes automatically to all initial messages.

   (6) Program Data Retention. Program data and codes shall be retained
   even with the power removed.

   (7) Indicator. An aural or visible means that it activated when the
   Preamble is sent and deactivated at the End of Message code.

   (8) Spurious Response. All frequency components outside 200 to 4000 Hz
   shall be attenuated by 40 dB or more with respect to the output levels
   of the mark or space frequencies.

   (9) Attention Signal generator. The encoder must provide an attention
   signal that complies with the following:

   (i) Tone Frequencies. The audio tones shall have fundamental
   frequencies of 853 and 960 Hz and not vary over ±0.5 Hz.

   (ii) Harmonic Distortion. The total harmonic distortion of each of the
   audio tones may not exceed 5% at the encoder output terminals.

   (iii) Minimum Level of Output. The encoder shall have an output level
   capability of at least + 8 dBm into a 600 Ohm load impedance at each
   audio tone. A means shall be provided to permit individual activation
   of the two tones for calibration of associated systems.

   (iv) Time Period for Transmission of Tones. The encoder shall have
   timing circuitry that automatically generates the two tones
   simultaneously for a time period of 8 seconds.

   (v) Inadvertent activation. The switch used for initiating the
   automatic generation of the simultaneous tones shall be protected to
   prevent accidental operation.

   (vi) Indicator Display. The encoder shall be provided with a visual
   and/or aural indicator which clearly shows that the Attention Signal is
   activated.

   (b) Operating Temperature and Humidity. Encoders shall have the ability
   to operate with the above specifications within an ambient temperature
   range of 0 to + 50 degrees C and a range of relative humidity of up to
   95%.

   (c) Primary Supply Voltage Variation. Encoders shall be capable of
   complying with the requirements of this section during a variation in
   primary supply voltage of 85 percent to 115 percent of its rated value.

   (d) Testing Encoder Units. Encoders not covered by § 11.34(e) of this
   part shall be tested in a 10 V/m minimum RF field at an AM broadcast
   frequency and a 0.5 V/m minimum RF field at an FM or TV broadcast
   frequency to simulate actual working conditions.

   [ 59 FR 67092 , Dec. 28, 1994, as amended at  77 FR 16703 , Mar. 22, 2012]

   


Goto Section: 11.31 | 11.33

Goto Year: 2020 | 2022
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