Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Data Sheet
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Page 10 of 15
RF Section Specifications, continued
Station Delay Characteristics 65 / 86 Split
Forward
(Chrominance to Luminance Delay)
Forward
(Chrominance to Luminance Delay)
Reverse
(Group Delay in 1.5 MHz BW)
Frequency (MHz)
Delay (nS)
Frequency (MHz)
Delay (nS)
112.25 - 116.68
3
5.0 - 6.5
35
119.25 - 123.68
2
6.5 - 8.0
15
126.25 - 130.68
2
8.0 - 9.5
7
60.5 - 62.0
9
62.0 - 63.5
13
63.5 - 65.0
15
Unless otherwise noted, specifications reflect typical performance and are referenced to 68
F (20 C). Specifications are based
upon measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.
Notes for RF Section Specifications:
1.
1.
Forward operational gain is for station from output of optical Rx to node RF output port, with 0 dB pad in optical interface board
(OIB), any forward configuration module, 3 dB interstage (I/S) pad, 7.5 dB linear I/S EQ, factory select output pad. Includes OIB
losses.
(OIB), any forward configuration module, 3 dB interstage (I/S) pad, 7.5 dB linear I/S EQ, factory select output pad. Includes OIB
losses.
2.
Reference output tilt and internal tilt are both “Linear” tilt.
3.
Forward noise figure at input of OIB (Rx output), with 0 dB OIB pad, any forward configuration module, 3 dB I/S pad, 7.5 dB linear
I/S EQ, factory select output pad.
I/S EQ, factory select output pad.
4.
Forward internal tilt specified is primarily due to an on-board fixed equalizer and a factory configured 7.5 dB linear I/S EQ
5.
The forward reference output tilt specified is achieved via field installation of appropriate linear I/S EQ, in conjunction with the
internal tilt of the launch amplifier and the tilt associated with the optical link (transmitter/receiver combination).
internal tilt of the launch amplifier and the tilt associated with the optical link (transmitter/receiver combination).
6.
Stated distortion performance is for launch amplifier section operated at reference output levels and tilts. Full station performance
can be determined by combining optic performance and launch amplifier performance.
can be determined by combining optic performance and launch amplifier performance.
7.
Reverse operational gain from the node’s input port(s) to reverse transmitter input, with 0 dB reverse input pad, any reverse
configuration module, 0 dB OIB pad. Includes OIB losses.
configuration module, 0 dB OIB pad. Includes OIB losses.
8.
Loaded with 78 NTSC CW carriers from 77-550 MHz. “Digital” refers to 550 - 1002 MHz loading with QAM carriers at -6 dB relative
to analog video carrier levels.
to analog video carrier levels.
9.
Reverse noise figure from reverse input port to input of reverse optical transmitter module, with 0 dB reverse input pad.
10. X-mod (@ 15.75 kHz) specified using 100% synchronous modulation and frequency-selective measurement device.
11. Loaded with 64 PAL B/G CW carriers from 112-600 MHz. “Digital” refers to 600 - 1002 MHz loading with QAM carriers at -6 dB
11. Loaded with 64 PAL B/G CW carriers from 112-600 MHz. “Digital” refers to 600 - 1002 MHz loading with QAM carriers at -6 dB
relative to analog video carrier levels.
12. Loaded with 64 PAL I CW carriers from 88-600 MHz. “Digital” refers to 600 - 1002 MHz loading with QAM carriers at -6 dB relative
to analog video carrier levels.
13. Tested per CENELEC Standard EN50083-3. RF output level is at 1002 MHz (forward).