Техническая Спецификация для Cisco Cisco 1 GHz GainMaker Amplifier
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Reverse Station Performance
Units
Notes
Cross Modulation
dB
80
5, 9
Composite Second Order (High Side)
dB
82
9
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.
Table 4.
Station Delay Characteristics
Station Delay Characteristics
Forward (Chrominance to Luminance Delay)
Reverse (Group Delay in 1.5 MHz bandwidth)
Frequency (MHz)
Delay (ns)
Frequency (MHz)
Delay (ns)
109.25 - 112.83
13
5.0 - 6.5
60
115.25 - 118.83
7
6.5 - 8.0
22
121.25 - 124.83
5
8.0 - 9.5
12
80.5 - 82.0
10
82.0 - 83.5
13
83.5 - 85.0
18
Table 5.
Station Powering Data
Station Powering Data
GainMaker High
Output HGBT
Output HGBT
I DC
(Amps)
AC Voltage
90
85
80
75
70
65
60
55
50
45
40
35
Thermal
2.21
AC Current (A)
0.86
0.88
0.88
0.89
0.93
0.98
1.21
1.25
1.37
1.52
1.72
2.01
Power (W)
59.6
59.6
59.8
59.1
59.2
59.3
59.0
59.1
59.1
59.5
59.6
60.2
AGC
2.27
AC Current (A)
0.87
0.90
0.90
0.92
0.95
1.01
1.24
1.26
1.39
1.54
1.75
2.05
Power (W)
60.7
61.2
61.2
60.6
60.4
61.2
60.6
60.6
60.7
60.9
61.5
62.0
AGC with Status
Mon. & Reverse
Switch
Mon. & Reverse
Switch
2.41
AC Current (A)
0.91
0.94
0.94
0.97
1.01
1.08
1.34
1.38
1.50
1.64
1.90
2.25
Power (W)
64.7
65.2
64.9
65.0
64.6
64.2
64.7
65.1
65.0
65.2
65.0
65.9
Data is based on stations configured for 2-way operation. AC currents specified are based on measurements made
with typical CATV type ferroresonant AC power supply (quasi-square wave) and GainMaker High Output System
Amplifier power supply (2.5 A, 24 VDC, pn 4022846).
DC supply has a user-configurable 30 V, 40 V, or 50 VAC under voltage lockout circuit. Default setting is 30 V 40 V
or 50 VAC under voltage lockout may be selected by changing the position of the lockout jumper.
Notes:
1.
Reference output tilt is specified as “LINEAR” tilt (as opposed to “cable” tilt).
2. Forward Gain and Noise Figure measured with 0 dB input EQ and 1 dB input pad.
3. Down tilt, the effect of cable, is represented by a (-). Up tilt, the effect of equalization, is represented by a (+).
4. 73 CW NTSC channels loaded from 115 to 550 MHz. Digital refers to 550-1002 MHz loading with QAM
carriers at -6 dB levels relative to analog video carrier levels.
5. X-mod (@ 15.75 kHz) specified using 100% synchronous modulation and frequency selective measurement
device.