Sec.  11.32   EAS Encoder.

   (a) EAS Encoders must at a minimum be capable of encoding the EAS protocol
   described in  Sec. 11.31 and providing the EAS code transmission requirements
   described in  Sec. 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 two inputs, one for audio messages and
   one for data messages (RS–232C with standard protocol and 1200 baud rate).

   (3) Outputs. The encoder shall have two outputs, one audio port and one data
   port (RS–232C with standard protocol and 1200 baud rate).

   (4) Calibration. EAS Encoders must provide a means to comply with the
   modulation levels required in  Sec. 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 not less than 8 nor longer than 25 seconds. NOTE: Prior to
   July 1, 1995, the Attention Signal must be at least 20 and not more than 25
   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  Sec. 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.