Cisco 1218 MHz GainMaker High Gain Dual System Amplifier Data Sheet

Data Sheet

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Updated:June 12, 2019

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

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Updated:June 12, 2019

Table of Contents

 

 

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 Dual (HGD) System Amplifier helps to make these demands a reality. The Cisco 1218 MHz GainMaker® High Gain Dual (HGD) System Amplifier (Figure 1) provides two high-level forward RF outputs (main and auxiliary), with the option to create a third RF output by using an optional plug-in auxiliary path signal director.

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 1.2GHz 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.

datasheet-c78-736468_0.jpg

Figure 1.           

Cisco 1218 MHz GainMaker High Gain Dual (HGD) System Amplifier

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-c78-736468_1.jpg

Figure 2.           

Block Diagram of Cisco 1218 MHz GainMaker High Gain Dual (HGD) System 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              1218MHz

                                                                                  1002 MHz

                                                                                     870 MHz

                                                                                     750 MHz

                                                                                     650 MHz

                                                                                     550 MHz

                                                                                     258 MHz

                                                                                     105MHz

                                                                                       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 13.5 dB I/S EQ

Notes

Operational gain (minimum)

dB

48

2

Internal tilt (± 0.5 dB) at 54 - 1218 MHz

dB

19.0

3

Noise figure at 54, 65, 105, 258 MHz

dB

8.5

2

Noise figure at 1218MHz

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) at 42 MHz

dB

21.6

6, 7

Operational gain (minimum) at 65 MHz

dB

22.7

6, 7

Operational gain (minimum) at 85 MHz

dB

23.8

6, 7

Operational gain (minimum) at 204 MHz

dB

27.2

6, 7

Internal tilt (± 0.5 dB)

dB

0

3

Noise figure

dB

11

6, 7

NPR at 50 dB CNR at 42MHz

dB

20

 

NPR at 50 dB CNR at 65 MHz

dB

19

 

NPR at 50 dB CNR at 85 MHz

dB

15

 

NPR at 50 dB CNR at 204 MHz

dB

11.5

 

Table 4.          Station Delay Characteristics

Station Delay Characteristics (42/54)

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)

Forward
(Chrominance to Luminance Delay)

Reverse
(Group Delay in 1.5 MHz bandwidth)

Frequency (MHz)

Delay (ns)

Frequency (MHz)

Delay (ns)

112.25 to 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 (85/105)

Forward
(Chrominance to Luminance Delay)

Reverse
(Group Delay in 1.5 MHz bandwidth)

Frequency (MHz)

Delay (ns)

Frequency (MHz)

Delay (ns)

109.275 to 112.855

25

5.0 to 6.5

60

115.275 to 118.855

15

6.5 to 8.0

22

121.2625 to 124.8425

10

8.0 to 9.5

12

127.2625 to 130.8425

5

80.5 to 82.0

10

 

 

82.0 to 83.5

17

 

 

83.5 to 85.0

21

 

Station Delay Characteristics (204/258)

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

6

 

 

201 – 202.5

5

 

 

202.5 – 204

8

Table 5.          Station Powering Data

Station Powering Data

Cisco GainMaker

HGD System Amplifier

I DC
(Amps)

 

AC Voltage

90

85

80

75

70

65

60

55

50

45

40

35

Thermal

1.42

AC current (A)

0.66

0.67

0.65

0.65

0.64

0.65

0.74

0.79

0.85

0.94

1.05

1.22

Power (W)

39.2

38.9

38.7

38.7

38.6

38.6

38.6

38.6

38.6

38.7

38.8

39.2

AGC

1.47

AC current (A)

0.67

0.68

0.67

0.67

0.66

0.67

0.76

0.81

0.88

0.97

1.10

1.26

Power (W)

40.5

40.2

40.2

40.1

39.9

39.9

39.9

39.9

40.0

40.1

40.2

40.6

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.

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 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 6dB back-off
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 Systems 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 HGD System Amplifier is available in a wide variety of configurations. Table 8 contains the configured PIDs for the High Gain Dual Amplifiers. Table 8 and Table 9 contain ordering information for required and optional accessories. Consult with your account representative, customer service representative, or systems engineer to determine the best configuration for your particular application.

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

Cisco GainMaker 1.2-GHz HGD Amp Configurations

Part Number for Ordering

42/54 MHz Split

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

GMSADS4THXXXXXXXXX

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

GMSADS4TXXXXXXXXXX

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

GMSADS45HXXXXXXXXX

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

GMSADS45XXXXXXXXXX

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

GMSADS8THXXXXXXXXX

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

GMSADS8TXXXXXXXXXX

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

GMSADS85HXXXXXXXXX

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

GMSADS85XXXXXXXXXX

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

GMSADS6THXXXXXXXXX

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

GMSADS6TXXXXXXXXXX

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

GMSADS65HXXXXXXXXX

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

GMSADS65XXXXXXXXXX

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

GMSADS2THXXXXXXXXX

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

GMSADS2TXXXXXXXXXX

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

GMSADS25HXXXXXXXXX

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

GMSADS25XXXXXXXXXX

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 dB0 – 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

Plug-in Signal Director for Auxiliary output: 1 required, chose from the following:

  Jumper
  Two-Way Splitter
  DC-8 Directional Coupler
  DC-12 Directional Coupler

 

GM-SD-1.2G-JMP=

GM-SD-1.2G-SPLT=

GM-SD-1.2G-DC8=

GM-SD-1.2G-DC12=

The optional accessories listed in Table 8 can be ordered separately.

Table 9.          Optional Accessories

Optional Accessories

Part Number

24V Power Supply for Cisco GainMaker AMPs

GM-PS-HO=

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 HGD Split Kit 85/105 MHz (PKG OF 10)

GMSA-SKT-1.2G-85=

Cisco GainMaker SA HGD 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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