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Cisco 1218 MHz GainMaker High-Gain Balanced Triple System Amplifier Data Sheet

Data Sheet

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Updated:March 27, 2019

Available Languages

Download Options

  • PDF
    (580.4 KB)
    View with Adobe Reader on a variety of devices
Updated:March 27, 2019
 

 

Consumer bandwidth demand continues to grow at a rapid rate every year. As a result, cable operators with DOCSIS-based equipment will need to future proof their networks. They want to plan for reduced service-group sizes and ultimately double or quadruple (or more) bandwidth speeds. The Cisco 1218 MHz GainMaker® High Gain Balanced Triple (HGBT) System Amplifier helps to make these demands a reality. The Cisco 1218 MHz HGBT amplifier provides three high-level forward RF outputs (main and two auxiliary).

Cisco 1218 MHz GainMaker system amplifier modules have increased gain to allow drop in for 750, 870, and 1002 MHz spacing, and are mechanically compatible with previous Cisco GainMaker, System Amplifier II, II+, and III housing bases, often allowing upgrades to higher bandwidth with no respacing or resplicing. The DC power supply is modular and located in an updated housing lid for easy access. All Cisco 1.2 GHz GainMaker system amplifier modules are factory configured with reverse amplifier, diplex filters, thermal compensation circuit, forward interstage pads, and equalizer to promote optimal performance. Optional single-pilot Automatic Gain Control (AGC) configurations are also available.

Features

     High-performance Gallium Nitride (GaN) gain stage technology.

     Plug-in accessories that are common to all Cisco 1218 MHz GainMaker amps and Cisco GS7000 products (that is, attenuator pads, diplexers, and crowbar).

     Amplifier housing that provides access to RF test points without opening the housing.

     Spring-loaded seizure assemblies allow coaxial connectors to be installed or removed without removing amplifier RF module.

     Power supply mounted in housing lid for efficient thermal dissipation (60- and 90-VAC powering capability).

     15A current capacity (steady state) and 25A surge survivability.

     Quadrature Amplitude Modulation (QAM) pilot AGC available (optional).

     AGC with thermal backup, which eliminates disruptive RF output variation in the event of pilot loss.

     Reverse input pad and RF test point for each reverse input port to allow optimum reverse path design and alignment.

     Surge-resistant circuitry that helps ensure gain stage protection without fuses or other failure-causing devices.

datasheet-c78-736466_0.jpg

Figure 1.           

Block Diagram – 1.2 GHz High Gain Balanced Triple Amplifier

Specifications

Table 1.             General Station Performance

General Station Performance

Units

Forward

Reverse

Notes

Pass band

MHz

54-1218

5-204

 

Amplifier type

-

GaN

GaAs HBT

 

Frequency response

dB

± 0.5

± 0.5

 

Auto slope and gain range

dB

± 5.8

-

 

Return loss

dB

16

16

7

Maximum AC through current (continuous)

Amps

15

-

 

Maximum AC through current (surge)

Amps

25

-

 

Hum modulation at 12A

(over specified frequency range)

dB

70 (54-870 MHz)

60 (870-1218 MHz)

60 (5-25 MHz)

70 (25-42 MHz)

 

Hum modulation at 15A

(over specified frequency range)

dB

65 (54-870 MHz)

60 (870-1218 MHz)

60 (5-25 MHz)

65 (25-42 MHz)

 

Test points (± 0.75 dB)

dB

-20

-20

 

Reference output level at                                  1218 MHz

                                            1002 MHz

                                              870 MHz

                                               750 MHz

                                              650 MHz

                                               550 MHz

                                              258 MHz

                                               105 MHz

                                                 86 MHz

                                            54 MHz

dBmV

58.0

54.7

52.7

50.8

49.3

47.8

43.3

41.0

40.7

40.2

35 (at 42 MHz)

 

 

 

 

35 (at 5 MHz)

 

Reference output tilt              (54-1218 MHz)

                                                                       (86-1218 MHz)

                                                                       (105-1218 MHz)

                                                                       (258-1218 MHz)

dB

17.8

17.3

17.0

14.7

-

1

Table 2.             Forward Station Performance

Forward Station Performance

Units

Auto/Thermal with 12 dB I/S EQ

Notes

Operational gain (minimum)

dB

46

2

Internal tilt (± 0.5 dB) @ 54 – 1218 MHz

dB

19.0

3

Noise figure at 54, 86, 105, 258 MHz

dB

8.5

2

Noise figure at 1 218MHz

dB

8.0

2

Composite triple beat

dBc

66

4,9

Cross modulation

dBc

63

4,5,9

Composite second order (high side)

dBc

66

4,9

Composite intermodulation noise (CIN)

dBc

50

4,8,9,10

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 3.          Reverse Station Performance

Reverse Station Performance

Units

 

Notes

Operational gain (minimum) @ 42 MHz

                                                                                     @ 65 MHz

                                                                                     @ 85 MHz

                                                                                  @ 204 MHz

dB

21.6

22.7

23.8

27.2

6,7

Internal tilt (± 0.5 dB)

dB

0

3

Noise figure

dB

11.0

6,7

NPR at 50dB CNR at 42 MHz

NPR at 50dB CNR at 65 MHz

NPR at 50dB CNR at 85 MHz

NPR at 50dB CNR at 204 MHz

dB

20

19

15

11.5

 

Table 4.             Station Delay Characteristics

Station Delay Characteristics (42/54 Split)

Forward (Chrominance to Luminance Delay)

Reverse (Group Delay in 1.5 MHz bandwidth)

Frequency (MHz)

Delay (ns)

Frequency (MHz)

Delay (ns)

55.25 to 58.83

39

5.0 to 6.5

60

61.25 to 64.83

25

6.5 to 8.0

22

67.25 to 70.83

17

8.0 to 9.5

12

77.25 to 80.83

10

37.5 to 39.0

20

 

 

39.0 to 40.5

32

 

 

40.5 to 42.0

50

 

Station Delay Characteristics (65/86 Split)

Forward (Chrominance to Luminance Delay)

Reverse (Group Delay in 1.5 MHz bandwidth)

Frequency (MHz)

Delay (ns)

Frequency (MHz)

Delay (ns)

112.25 - 116.68

8

5.0 to 6.5

60

119.25 - 123.68

7

6.5 to 8.0

22

126.25 - 130.68

6

8.0 to 9.5

12

133.25 - 137.68

6

60.5 – 62.0

10

 

 

62.0 – 63.5

17

 

 

63.5 – 65.0

21

 

Station Delay Characteristics (85/102 Split)

Forward (Chrominance to Luminance Delay)

Reverse (Group Delay in 1.5 MHz bandwidth)

Frequency (MHz)

Delay (ns)

Frequency (MHz)

Delay (ns)

109.275 - 112.855

25

5.0 to 6.5

60

115.275 - 118.855

15

6.5 to 8.0

22

121.2625 - 124.8425

10

8.0 to 9.5

12

127.2625 - 130.8425

5

80.5 – 82.0

10

 

 

82.0 – 83.5

17

 

 

83.5 – 85.0

21

 

Station Delay Characteristics (204/258 Split)

Forward (Chrominance to Luminance Delay)

Reverse (Group Delay in 1.5 MHz bandwidth)

Frequency (MHz)

Delay (ns)

Frequency (MHz)

Delay (ns)

259.2625 - 262.8425

10

5.0 to 6.5

60

265.2625 - 268.8425

8

6.5 to 8.0

22

271.2625 - 274.8425

7

8.0 to 9.5

12

277.2625 - 280.8425

5

199.5 -201.0

6

 

 

201.0-202.5

5

 

 

202.5-204.0

8

Table 5.          Station Powering Data

Station Powering Data

Cisco GainMaker HGBT System Amplifier

I DC
(Amps)

 

AC Voltage

90

85

80

75

70

65

60

55

50

45

40

35

Thermal

1.85

AC current (A)

0.66

0.68

0.72

0.73

0.76

0.81

0.87

0.94

1.04

1.18

1.35

1.61

Power (W)

49.0

48.7

48.2

48.1

47.8

47.6

47.6

47.5

47.5

47.6

47.5

47.9

AGC

1.90

AC current (A)

0.67

0.69

0.73

0.74

0.77

0.82

0.89

0.97

1.07

1.21

1.38

1.64

Power (W)

50.1

49.7

49.3

49.2

48.9

48.6

48.6

48.6

48.6

48.6

48.8

49.0

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.

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, part number 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.

Note:         

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 negative sign (-). Up tilt, the effect of equalization, is represented by a plus sign (+).

4.  Mixed loading of 79 analog channels (54–554MHz) and SC-QAM’s (554–1218MHz) with 6 dB backoff.

5.  X-mod (at 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 Engineering for CIN calculation.

10.  CIN spec number is the same for both all QAM and mixed analog loading.

Table 6.          Physical Specifications

Environmental

Operating temperature range

-40 - 140°F (-40 - 60°C)

 

Mechanical

Housing dimensions (L x H x D)

17.3 in. x 7.2 in. x 7.8 in. (439.4 mm x 182.9 mm x 198.1 mm)

Weight

  Housing with power supply
  Module

 

12 lb, 5 oz (5.6 kg)

5 lb, 5 oz (2.4 kg)

Unless otherwise noted, specifications reflect typical performance and are referenced to 68°F (20°C). Specifications are based on measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.

Ordering Information

The Cisco GainMaker HGBT System Amplifier is available in a wide variety of configurations. Table 7 contains the configured PIDs for the High Gain Balanced Triple Amplifiers. Table 8 and Table 9 contain ordering information for required and optional accessories. Consult with your Cisco account representative, customer service representative, or system engineer to determine the best configuration for your particular application.

Table 7.          Cisco GainMaker High Gain Balanced Triple (HGD) Amp Configurations

Cisco GainMaker 1.2-GHz HGD Amp Configurations

Part Number for Ordering

42/54 MHz Split

GMSA 1.2 GHz, HGBT,42/54, CB, PS, CTD HSG, TPA, Thermal

GMSATS4THXXXXXXXXX

GMSA 1.2 GHz, HGBT,42/54, CB, Launch Amp, Thermal

GMSATS4TXXXXXXXXXX

GMSA 1.2 GHz, HGBT,42/54, CB, PS, CTD HSG, TPA, QAM AGC 711 MHz

GMSATS45HXXXXXXXXX

GMSA 1.2 GHz, HGBT,42/54, CB, Launch Amp, QAM AGC 711 MHz

GMSATS45XXXXXXXXXX

GMSA 1.2 GHz, HGBT,65/86, CB, PS, CTD HSG, TPA, Thermal

GMSATS6THXXXXXXXXX

GMSA 1.2 GHz, HGBT,65/86, CB, Launch Amp, Thermal

GMSATS6TXXXXXXXXXX

GMSA 1.2 GHz, HGBT,65/86, CB, PS, CTD HSG, TPA, QAM AGC 711 MHz

GMSATS65HXXXXXXXXX

GMSA 1.2 GHz, HGBT,65/86, CB, Launch Amp, QAM AGC 711 MHz

GMSATS65XXXXXXXXXX

GMSA 1.2 GHz, HGBT,85/102, CB, PS, CTD HSG, TPA, Thermal

GMSATS8THXXXXXXXXX

GMSA 1.2 GHz, HGBT,85/102, CB, Launch Amp, Thermal

GMSATS8TXXXXXXXXXX

GMSA 1.2 GHz, HGBT,85/102, CB, PS, CTD HSG, TPA, QAM AGC 711 MHz

GMSATS85HXXXXXXXXX

GMSA 1.2 GHz, HGBT,85/102, CB, Launch Amp, QAM AGC 711 MHz

GMSATS85XXXXXXXXXX

GMSA 1.2 GHz, HGBT,204/258, CB, PS, CTD HSG, TPA, Thermal

GMSATS2THXXXXXXXXX

GMSA 1.2 GHz, HGBT,204/258, CB, Launch Amp, Thermal

GMSATS2TXXXXXXXXXX

GMSA 1.2 GHz, HGBT,204/258, CB, PS, CTD HSG, TPA, QAM AGC 711 MHz

GMSATS25HXXXXXXXXX

GMSA 1.2 GHz, HGBT,204/258, CB, Launch Amp, QAM AGC 711 MHz

GMSATS25XXXXXXXXXX

Table 8.            Required Accessories

Required Accessories

Part Number

Plug-in Pads (attenuators): Available in 1.0 dB steps from 0 to 20 dB

  1 required for forward input
  1 required for AGC, if applicable *
  4 required for reverse (3 input, 1 output)

*To determine AGC pad value, subtract 34 dB from the design value main port RF output level at the AGC pilot frequency.

GM-PAD-1.2G-00= and

GM-PAD-1.2G-1.0 sequentially through

GM-PAD-1.2G-20.0=

Plug-in Forward Cable Equalizer: Available in 1.5 dB steps from 0 to 30 dB at 1002 MHz

  1 required for forward input

GM-EQC-1.2G-0= and

GM-EQC-1.2G-1.5 sequentially through

GM-EQC-1.2G-30=

Plug-in Reverse Cable Equalizer: Available in 1 dB steps from 0 to 12 dB at 42 MHz

  1 required for reverse output, unless design value is 0 dB (0 dB EQ is provided)

712719 (0 dB) and

589628 (1dB) sequentially thru 589639 (12 dB) – 40 MHz

589736 (1 dB) sequentially thru 589747 (12 dB) – 65 MHz

4036769 (1 dB) sequentially thru 4036780 (12 dB) – 85 MHz

GM-EQREV-204M-1= (1 dB) sequentially thru GM-EQREV-204M-12= (12 dB) – 204 MHz

The optional accessories listed in Table 9 can be ordered separately.

Table 9.          Optional Accessories

Optional Accessories

Part Number

24V Power Supply for Cisco GainMaker HGD

4026157

230 VAC Crowbar Surge Protector (plug-in, one per station)

715973

Plug-in Inverse Equalizer: Simulates cable equivalent tilts (creates tilt opposite that of equalizers). Use in place of forward input EQ as needed to maintain proper output tilt in short spaced locations. Available in 1.5dB cable-equivalent steps from 1.5 to 21.0dB

GM-EQIN-1.2G-1.5= sequentially thru GM-EQIN-1.2G-21=

Long Reach Test Point Adapter

562580

Cisco GainMaker SA HGBT Split Kit 85/102 MHz (PKG OF 10)

GMSA-SKT-1.2G-85=

Cisco GainMaker SA HGBT Split Kit 204/258 MHz (PKG OF 10)

GMSA-SKT-1.2G-204=

Cisco GainMaker 1.2 GHz Amplifier Housing

GMSA-HSG-1.2G=

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