Cisco Cisco 1 GHz GainMaker Amplifier データシート
© 2014 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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Table 4.
Station Delay Characteristics
Station Delay Characteristics
Forward
(Chrominance to Luminance Delay)
(Chrominance to Luminance Delay)
Reverse
(Group Delay in 1.5 MHz bandwidth)
(Group Delay in 1.5 MHz bandwidth)
Frequency (MHz)
Delay (ns)
Frequency (MHz)
Delay (ns)
55.25 to 58.83
37
5.0 to 6.5
60
61.25 to 64.83
14
6.5 to 8.0
22
67.25 to 70.83
8
8.0 to 9.5
12
77.25 to 80.83
4
37.5 to 39.0
16
39.0 to 40.5
22
40.5 to 42.0
35
Table 5.
Station Powering Data
Station Powering Data
Cisco GainMaker
GaN HGD System
Amplifier
Amplifier
I DC
(Amps)
AC Voltage
90
42
80
75
70
65
60
55
50
45
40
35
Thermal
1.51
AC current (A)
0.69
0.69
0.66
0.67
0.66
0.68
0.77
0.83
0.89
0.99
1.11
1.31
Power (W)
41.2
41.1
41.0
40.8
40.7
40.7
40.6
40.6
40.6
40.5
40.6
40.8
AGC
1.56
AC current (A)
0.70
0.70
0.68
0.69
0.68
0.70
0.79
0.85
0.92
1.02
1.16
1.35
Power (W)
42.5
42.4
42.3
42.2
42.0
42.0
41.9
41.9
41.9
41.9
42.0
42.2
AGC with status
monitor and
reverse switch
monitor and
reverse switch
1.70
AC current (A)
0.73
0.73
0.72
0.73
0.73
0.77
0.86
0.92
1.01
1.12
1.27
1.46
Power (W)
46.2
46.1
46.0
45.9
45.8
45.7
45.6
45.6
45.6
45.6
45.8
46.0
Data is based on stations configured for two-way operation. AC currents specified are based on measurements made with typical
CATV type ferroresonant AC power supply (quasi-square wave), and Cisco GainMaker High Output System Amplifier power
supply (2.5A, 24 VDC, pn 4022846).
CATV type ferroresonant AC power supply (quasi-square wave), and Cisco GainMaker High Output System Amplifier power
supply (2.5A, 24 VDC, pn 4022846).
DC supply has a user configurable 30V, 40V, or 50 VAC under voltage lockout circuit. Default setting is 30V, 40V, or 50 VAC.
Under-voltage lockout may be selected by changing the position of the lockout jumper.
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).
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. 78 CW NTSC channels loaded from 55 to 550 MHz. Digital refers to 550 to 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 percent synchronous modulation and frequency selective measurement device.
6. Reverse gain and noise figure for station with 0 dB reverse input pad, 0 dB reverse output EQ, and 1 dB output pad.
7. Reverse operational gain, noise figure, and return loss are specified without reverse switch option. If switch is installed, reduce
gain by 0.5 dB, increase noise figure by 0.5 dB, and decrease return loss by 1 dB.
8. Composite Intermodulation noise is a broadband noise-like distortion product associated with QAM loading.
9. Distortion performance at reference output levels and tilt. Contact Cisco Systems Engineering for CIN calculation.
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.
upon measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.