Cisco Cisco Legacy Line Extenders Scheda Tecnica
Unless otherwise noted, the above specifications reflect typical station performance at stated reference levels in the recommended operating
configuration, including the input equalizer and reverse filters where applicable. Unless otherwise noted, specifications are based on measurements
made in accordance with NCTA Practices for Measurements on Cable Television Systems using standard frequency assignments and are referenced to
68
configuration, including the input equalizer and reverse filters where applicable. Unless otherwise noted, specifications are based on measurements
made in accordance with NCTA Practices for Measurements on Cable Television Systems using standard frequency assignments and are referenced to
68
°
F (20
°
C).
Manual
Manual
Thermal
Auto
Units
No I/S EQ
9 dB I/S EQ
9 dB I/S EQ
9 dB I/S EQ
Operational Gain
3
dB
36
34.5
29
27.5
Internal Tilt
2
(±0.5 dB)
dB
+0.5
+6.5
+5.0
+6.2
Noise Figure
3
@ 54 MHz
dB
7
7.5
8
8
Noise Figure
3
@ 750 MHz
dB
9
9
9.5
9.5
77 NTSC Channels (CW)
4
Composite Triple Beat
dB
70
70
69
66
Cross Modulation
dB
66
66
65
62
Composite Second Order (high side)
dB
69
68
66
63
110 NTSC Channels (CW)
Composite Triple Beat
Composite Triple Beat
dB
60
60
59
55
Cross Modulation
dB
61
61
60
56
Composite Second Order (high side)
dB
62
62
61
59
Forward Station Performance
Reverse Performance - 5 CW carriers
Units
Forward
Reverse
Pass Band
MHz
52-750
5-40
Amplifier Type
---
PHD
PP
Operational Temperature Range
degrees
-40 to +140 F
-40 to +140 F
Frequency Response
dB
±0.5
±0.5
Auto Slope & Gain Range
dB
±4
N/A
Return Loss
dB
15
16
Operational AC Through Current
Amps
15
N/A
Max AC Through Current (2 hrs)
Amps
25
N/A
Hum Modulation @ 10 A
dB
70 (55-750 MHz)
58 (5-15 MHz)
(over specified frequency range)
65 (16-40 MHz)
Hum Modulation @ 15 A
dB
62 (55-150 MHz)
50 (5-15 MHz)
(over specified frequency range)
60 (151-750 MHz)
59 (16-40 MHz)
58 (601-750 MHZ)
Current Draw @ 24 V DC
Amps
0.63
0.13
Test Points (±0.5 dB)
dB
-20
-20
Reference Output Level–High Freq.
dBmV
46 @ 750 MHz
36 @ 40 MHz
5
44 @ 550 MHz
Reference Output Level–Low Freq.
dBmV
36 @ 54 MHz
36 @ 5 MHz
5
Reference Output Tilt
1
dB
10.0
0
LINE EXTENDER III-PHD – 5-40/52-750 MHZ
General Station Performance Data
Delay Characteristics
Units
Operational Gain
6
dB
19.5
Internal Tilt
2
(±0.5 dB)
dB
0
Reverse Noise Figure
6
dB
6
Composite Triple Beat
dB
90
Cross Modulation
dB
78
Composite Second Order
dB
81
Forward
Reverse
(Chrominance to Luminance Delay)
(Group Delay in 1.5 MHz BW)
Freq. (MHz)
Delay (ns)
Freq. (MHz)
Delay (ns)
55.25 - 58.83
24
5.0 - 6.5
55
61.25 - 64.83
12
10 - 11.5
6
67.25 - 70.83
6
33.5 - 35.0
8
77.25 - 80.83
3
38.5 - 40.0
25
NOTES:
(1) Forward reference output tilt is specified as “CABLE” tilt (as opposed to “linear” tilt).
(2) Down tilt, the effect of cable, is represented by a (-). Up tilt, the effect of equalization, is represented by a (+).
(3) Forward gain and noise figure with 0 dB input EQ and 1 dB input pad.
(4) Activation of digital loading may impact analog performance.
(5) Reverse output reference level with a 0 dB output EQ and 1 dB output pad.
(6) Reverse gain and noise figure for station, with 0 dB reverse input pad, 0 dB reverse output EQ, and 1 dB reverse output pad.
(1) Forward reference output tilt is specified as “CABLE” tilt (as opposed to “linear” tilt).
(2) Down tilt, the effect of cable, is represented by a (-). Up tilt, the effect of equalization, is represented by a (+).
(3) Forward gain and noise figure with 0 dB input EQ and 1 dB input pad.
(4) Activation of digital loading may impact analog performance.
(5) Reverse output reference level with a 0 dB output EQ and 1 dB output pad.
(6) Reverse gain and noise figure for station, with 0 dB reverse input pad, 0 dB reverse output EQ, and 1 dB reverse output pad.