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 &177; 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

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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.