Spurious:
Greater than 60 dB below signal level
Hum and Noise:
Greater than 60 dB below rated output
Oscillator Harmonics:
Greater than 60 dB below rated output
2.2.4.2
RF Module
One RF processor module shall be provided for each station in the FM
broadcast band listed under system performance in paragraph SYSTEM
DESCRIPTION. RF module shall as a minimum conform to the following
specifications:
88 - 108 MHz in or out as required
Output Level-Module:
Plus 52 dBmV
Output Level Control:
Plus or minus 10 dB
Stability:
0.005 percent, crystal
Limiting:
20 microvolts (minus 3 dB point)
Sensitivity:
3 microvolts for 30 dB quieting
Input Level:
Minimum 40 microvolts monaural and 60 microvolts stereo
Image Rejection:
90 dB
Passband:
200 kHz
Selectivity:
Under plus or minus 150 kHz at 30 dB down
Under plus or minus 250 kHz at 50 dB down
2.3
EQUIPMENT RACK
2.3.1
Free Standing Open Frame
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NOTE: The designer will select the appropriate
equipment mounting approach and will show a layout
to accommodate all system components at the head end.
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Free standing open frame equipment rack shall be [welded steel] [aluminum]
relay rack with uprights to mount equipment [482 mm 19 inches] [584 mm 23
inches] wide. Uprights shall be 76 mm 3 inch deep channel, 32 mm 1 1/4
inches wide, drilled and tapped 12-24 in a 13 mm 1/2 inch pattern. Rack
shall be provided with a standard top crossmember, and predrilled base
plate to allow floor fastening. Rack shall be 2134 mm 7 feet in height and
[clear coated] [painted]. Color shall be the manufacturer's standard.
2.3.2
Wall Mounted Open Frame
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NOTE: Delete hinge requirement when not needed.
**************************************************************************
Wall mounted open frame equipment rack shall be [steel] [aluminum] relay
SECTION 16785A
Page 17
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