optical systems so that unintentional changes in alignment or
microphonic effects will not occur during operation, movement, or
lens adjustments;
(6)
Have standard "C" lens mount;
(7) Be designed to protect personnel from exposure to high
voltage during operation and adjustment; and
(8) Meet requirements specified herein with either side of the
power source line grounded. Minimum essential requirements shall
include the following:
(a) Sensitivity: Produce a 100 Institute of Radio Engineers
(IRE) unit output with a minimum faceplate illumination of 0.538
lux 5 x 10-2 footcandles.
(b) Signal-to-noise ratio: Show a signal-to-noise ratio of not
less than 40 decibels (dB) when present at the specified
sensitivity and measured at 1.0 gamma.
(c) Resolution: Provide a horizontal resolution of at least 750
lines in Zone 1 with automatic gain and bandwidth at the specified
sensitivity.
(d) Gray scale: Produce at least 10 shades of gray at the
minimum specified sensitivity and at 1.0 gamma, using EIA standard
gray scale chart.
(e)
Be a minimum of 10 MHz +0, -0.5 dB.
(f)
Gamma:
Provide gamma selections of not less than 1.0 and 0.7.
(g) Geometric distortion: Camera shall be accurate to within a
maximum 1.5 percent geometric distortion in Zone 1 and to within 2
percent in Zones 2 and 3.
b.
Camera signals: CCTV camera vertical sync signal shall be
phase-locked to the ac power line frequency and shall remain line
locked at 60 Hz, plus or minus 0.3 Hz. Synchronization at the
video output shall conform to the timing specified by SMPTE 170M.
Camera shall operate on internally generated sync automatically
upon loss of external sync.
c.
Camera resolution
(1) Exterior: Horizontal resolution shall be 650 TV lines in the
center, greater than 500 TV lines in three corners, and greater
than 400 TV lines in the fourth corner. Vertical resolution shall
be 350 TV lines in the center. Resolution shall be maintained
over the specified input voltage and frequency range, and shall
not vary more than 100 TV lines from minimum specification over
the specified operating temperature range. Composite video output
level shall be automatically maintained to within plus or minus
0.1 volt over scene changes of 2.69 lux to 107,600 lux 0.25
footcandle to 1 x 104 footcandles with lenses of f/1.4 and greater.
(2) Interior: Horizontal resolution shall be at least 400 TV
lines. Vertical resolution shall be at least 350 TV lines.
SECTION 13703N
Page 47
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