DIMA
High Density RF Splitter/Combiner
DIMA Datasheet
About the Product
The Dense Intelligent Multi-Access (DIMA) is a headend splitter/combiner assembly in a 1RU or 5RU 19 inch chassis. Each module can integrate 3× double splitters, 2× four splitters, 1× eight splitters or directional coupler modules with varies values.
The DIMA platform is designed to operate as an RF splitter or combiner in both forward and return path configurations. It can be deployed in virtually any HFC environment and each port’s link attenuation can be independently adjusted to balance RF levels.
A single DIMA platform can be fitted with up to 160 input / output ports with every RF port having 1000 Vdc of voltage blocking. It also features excellent RF characteristics spanning 5-1000 MHz with each port having 30 dB of isolation.
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| Performance(1) | |||
| Module | 5Axx/5Cxx | 5109 | 5120 |
| Bandwidth | 5 ~ 1000 MHz | 5 ~ 1000 MHz | 5 ~ 1218 MHz |
| Flatness | ±0.5 dB | ±0.5 dB (Between input port and output port) ±0.75 dB (Between input port and coupling port) |
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| Impedance | 75 Ω | 75 Ω | 75 Ω |
| Splitter insertion loss |
5A32/5C32 4.5 dB 5A24/5C24 9.0 dB 5A18/5C18 13.0 dB |
> -1.5±0.5 dB (5~65MHz)(2) > -1.6±0.5 dB (65~550MHz)(2) > -1.7±0.5 dB (550~750MHz)(2) > -2.0±0.5 dB (750~1000MHz)(2) |
in/out 1.5 dB |
| Test point(3) | -20 ± 1dB (5Axx) | N/A | -20 ± 1dB (Full band) |
| RF return loss(4) | > 18 dB | > 19 dB | > 16 dB |
| Isolation(5) | > 30 dB | > 26 dB (5~65MHz) > 27 dB (65~550MHz) > 30 dB (550~1000MHz) |
N/A |
| Directional coupler value(6) | N/A | xx(7) ±0.75 dB | N/A |
| DC block | > 1000 Vdc | > 1000 Vdc | > 1000 Vdc |
| General | |||
| Temperature and humidity | Working temperature | -5 ~ 55 °C | |
| Storage temperature | -30 ~ 80 °C | ||
| Operating Humidity | 90 % (non-condensing) | ||
| Storage Humidity | 90 % (non-condensing) | ||
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Chassis Dimensions |
5RU: 223 x 484 x 386 mm 1RU: 266 x 443 x 45.5 mm |
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Module Dimensions |
22 x 130 x 220 mm |
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Chassis Weight |
5RU: 3.0 kg 1RU: 1.75 kg |
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| Module Weight | 0.7 kg | ||
| Module connector | F-connector | ||
Note:
(1) The not used ports are terminated by 75 Ω load.
(2) Between the input port and the output port.
(3) The test point is a unidirectional coupler used for monitoring the input of a splitter (5Axx); for 5Cxx, the test point’s deviation may vary due to differences in insertion loss with different modules. Example: 5Axx: -20 ± 1 dB; 5Cxx: -(20 + module insertion loss) ± 1 dB.
(4) Minimum between all the ports.
(5) 5Axx/5Cxx is between port and port, and 51xx is between the output port and the coupling port.
(6) Between the input port and the coupling port.
(7) Currently only a 9 dB directional coupler is available.
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Chassis |
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| D-DCHA-[Z] |
DIMA Chassis |
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Options: |
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| Z |
Height |
| 5U 1U |
5RU height chassis holding up to 20 DIMA modules 1RU height chassis holding up to 4 DIMA modules |
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Splitters and Combiners: |
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| D-DMOD-5[X][Y]-[Z] |
DIMA Modules |
| Options | |
| X |
Function |
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A
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Splitter
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| Y |
Configurations |
| 24 32 18
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2 x 4-way 3 x 2-way 1 x 8-way
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| Z |
Bandwidth |
| 1G | 5 ~ 1000 MHz |
Note:
(1) Function [X] variable 1 must be used with Configuration [Y] variable 09 or 20.
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Plug-in Attenuation Pad: |
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D-DMOD-ATT1-xx |
xx = 0 dB to 30 dB in 1 dB increments |
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Examples |
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D-DCHA-5U |
DIMA Chassis 20-slots, 5RU height |
| D-DCHA-1U | DIMA Chassis 4-slots, 1RU height |
| D-DMOD-5A18-1G | DIMA Splitter module, 1 x 8-way, 13 dB attenuation, 5-1000 MHz |
| D-DMOD-5A24-1G | DIMA Splitter module, 2 x 4-way, 9 dB attenuation, 5-1000 MHz |
| D-DMOD-5A32-1G | DIMA Splitter module, 3 x 2-way, 4.5 dB attenuation, 5-1000 MHz |
| D-DMOD-5C18-1G | DIMA Combiner module, 1 x 8-way, 13 dB attenuation, 5-1000 MHz |
| D-DMOD-5C24-1G | DIMA Combiner module, 2 x 4-way, 9 dB attenuation, 5-1000 MHz |
| D-DMOD-5C32-1G | DIMA Combiner module, 3 x 2-way, 4.5 dB attenuation, 5-1000 MHz |
| D-DMOD-5109-1G | DIMA Directional Coupler Modules, DC value 9dB, 5-1000 MHz |
| D-BP |
1-Slot Blank Panel |
