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.
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
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 |
||
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 |
Table 4. Station Delay Characteristics
Station Delay Characteristics |
|||
Forward |
Reverse |
||
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 |
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 |
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 |