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Cisco GainMaker GaN High Gain Dual System Amplifier 5-42/54-1002 MHz Data Sheet

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The Cisco GainMaker® GaN High Gain Dual (HGD) System Amplifier is the latest-generation broadband amplifier in the Cisco GainMaker platform. Gallium nitride (GaN) technology supports RF output levels up to 58 dBmV. The Cisco GaN HGD 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. All Cisco GainMaker products share common plug-in accessories and perform to 1 GHz in the forward path. The system amplifiers in this portfolio provide multiple forward RF output ports, while the line extenders provide a single forward RF output port.

Cisco GainMaker 1 GHz system amplifier modules have increased gain to allow drop in for 750-MHz spacing and are mechanically compatible with previous Cisco GainMaker System Amplifier II, II+, and III housing bases, often allowing upgrade 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 GainMaker 1 GHz 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.

Figure 1. Cisco GainMaker GaN HGD System Amplifier

Features

High-performance GaN gain stage technology

Plug-in accessories that are common to all Cisco GainMaker nodes and Cisco GS7000 products (i.e.,attenuator pads, equalizers, diplexers, and crowbar)

Amplifier cover that provides access to RF test points

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

Optional three-state reverse switch (on/off/-6 dB) that allows each reverse input to be isolated for noise and ingress troubleshooting (status monitoring required)

Quadrature amplitude modulation (QAM) and analog 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

Figure 2. Block Diagram

Specifications

Table 1. General Station Performance

General Station Performance

Units

Forward

Reverse

Notes

Pass band

MHz

54-1002

5-42

Amplifier type

-

GaN

PP

Frequency response

dB

± 0.5

± 0.5

Auto slope and gain range

dB

± 5.5

-

Return loss

dB

16

16

7

Maximum AC through current (continuous)

Amps

15

-

Maximum AC through current (surge)

Amps

25

-

Hum modulation @ 12A

(over specified frequency range)

dB

70 (54-870 MHz)

60 (870-1002 MHz)

60 (5-10 MHz)

70 (11-42 MHz)

Hum modulation @ 15A

(over specified frequency range)

dB

65 (54-870 MHz)

60 (870-1002 MHz)

60 (5-10 MHz)

65 (11-42 MHz)

Test points (± 0.5 dB)

dB

-20

-20

Reference output level @ 1002 MHz

870 MHz

750 MHz

650 MHz

550 MHz

54 MHz

dBmV

56.0

54.0

52.2

50.5

49.0

41.5

35 (@42 MHz)

35 (@ 5 MHz)

Reference output tilt (54-1002 MHz)

dB

14.5

-

1

Table 2. Forward Station Performance

Forward Station Performance

Units

Auto/Thermal with 10.5 dB I/S EQ

Notes

Operational gain (minimum)

dB

44

2

Internal tilt (± 0.5 dB)

dB

13.8

3

Noise figure @ 54 MHz

dB

8.5

2

Noise figure @ 1 GHz

dB

8.0

2

78 NTSC channels (CW) with digital

4

Composite triple beat

dB

70

9

Cross modulation

dB

66

5,9

Composite second order (high side)

dB

68

9

Composite intermodulation noise (CIN)

dB

60

8,9

Table 3. Reverse Station Performance

Reverse Station Performance

Units

Notes

Operational gain (minimum)

dB

19.5

6,7

Internal tilt (± 0.5 dB)

dB

0

3

Noise figure

dB

12

6,7

6 NTSC channels (CW)

Composite triple beat

dB

92

9

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)

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

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

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).
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 (-). 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.

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)

Ordering Information

The Cisco GainMaker GaN HGD System Amplifier is available in a wide variety of configurations. The desired configuration is “built” by accessing the Cisco Commerce Workspace tool at https://cisco-apps.cisco.com/cisco/psn/commerce. The user specifies the new Assemble to Order (ATO) Product ID for the GainMaker System Amplifier High Gain Dual System Amplifier “GMSA-HGD” and the tool steps through the available options. Services may also be selected during this process. Once all the desired options are selected, the configuration and price are displayed. When the “Done” radio button is clicked, the configuration can be exported and saved for future use or immediate ordering. Table 7 and Table 8 contain ordering information for required and optional accessories. Please consult with your Account Representative, Customer Service Representative, or System Engineer to determine the best configuration for your particular application.

Table 7. Required Accessories

Required Accessories

Part Number

Plug-in Pads (attenuators): Available in 0.5 dB steps from 0 to 20.5 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.

589693 (0 dB) sequentially thru 589734 (20.5dB)

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

1 required for forward input

4007228 (0 dB)

sequentially thru 4007248 (30 dB)

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

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

712719 (0 dB) and 589628 (1 dB)

sequentially thru 589639 (12 dB)

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

4008208

4008364

4008365

4008366

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

Table 8. Optional Accessories

Optional Accessories

Part Number

24V Power Supply for Cisco GainMaker HGD

734771

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

4007682

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 approximate 1.6 dB “cable equivalent” steps from 1.6 to 16.2 dB

4007486 (1.6 dB)

sequentially thru 4007495 (16.2 dB)

Long Reach Test Point Adapter

562580

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

4042372

Status Monitoring Transponder

Refer to the Cisco GainMaker Status Monitoring Transponder Data Sheet. http://www.cisco.com/c/en/us/products/video/transponders/index.html

The housing options listed in Table 9 may be included with the product if ordered using the Cisco GainMaker Ordering Matrix. They may also be ordered separately.

Table 9. Housing Options

Cisco GainMaker System Amplifier Housing: 1 required housing includes housing base, lid, wiring harness, and 24V power supply # 4022846. All housings have 15A capacity.

Part Number

Uncoated 4-port housing without external test point access

4026387

Chromate plated 4-port housing without external test point access

4026388

Uncoated 4-port housing with external test point access

4026385

Chromate plated 4-port housing with external test point access

4026386

Cisco GainMaker System Amplifier Housing Upgrade Kit: 1 required if upgrading an existing SA II, II+, or III housing to allow use of Cisco GainMaker System Amplifier modules. Includes a Cisco GainMaker System Amplifier housing lid, wiring harness, and 24V power supply # 4022846.

Uncoated 4-port housing lid without external test point access

4026389

Painted 4-port housing lid without external test point access

4026390

Uncoated 4-port housing lid with external test point access

4026391

Painted 4-port housing lid with external test point access

4026392

Seizure Upgrade Kit: 1 required if upgrading an existing SAII or SAII+ housing base to allow use of Cisco GainMaker System Amplifier Modules. Includes high current (15A) rated seizure screws and anvils.

548775

Cisco Systems, Inc.

1 800 722-2009 or 678 277-1120

http://www.cisco.com

Text Box: Printed in USA	C78-731589-00	04/14