PBN

DIMA

High Density RF Splitter/Combiner

AOCM3900 datasheet DIMA Datasheet

 

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DIMA

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.

  • Excellent RF characteristics spanning the entire 5-1000 MHz range 
  • High density RF combiner or splitter with up to 160 input/output ports 
  • Test point (-20 dB) 

 

 
  • Plug-in attenuation pad on every port to balance RF port levels 
  • Isolation more than 30 dB per port
  • Each RF port includes 1000 Vdc of voltage blocking 
  • Available module configurations:
    3 x 2, 2 x 4, 1 x 8, Directional coupler 

     

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)
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)

Chassis Dimensions
(W x D x H)

5RU: 223 x 484 x 386 mm

1RU: 266 x 443 x 45.5 mm

Module Dimensions
(W x D x H) 

22 x 130 x 220 mm

Chassis Weight 

5RU: 3.0 kg

1RU: 1.75 kg 

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.

Chassis

D-DCHA-[Z]

DIMA Chassis

Options:

Z

Height

5U
1U
5RU height chassis holding up to 20 DIMA modules
1RU height chassis holding up to 4 DIMA modules

Splitters and Combiners:

D-DMOD-5[X][Y]-[Z]

DIMA Modules

Options
X

Function

A
C


1

Splitter
Combiner


Directional Coupler

Y

Configurations

24
32
18


09 

20 
2 x 4-way
3 x 2-way
1 x 8-way


Directional Coupler Value (1)

Cassette with three directional couplers (2)
Z

Bandwidth

1G 5 ~ 1000 MHz

Note:

(1) Function [X] variable 1 must be used with Configuration [Y] variable 09 or 20.

(2) Only 1218 MHz version available.
The typical Model:
D-DMOD-5120-12: Cassette with three directional couplers 20 dB, in-out on rear, tap on front, 5~1218 MHz.

 

Plug-in Attenuation Pad:

D-DMOD-ATT1-xx 

xx = 0 dB to 30 dB in 1 dB increments 

Examples

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-DMOD-5120-12 Cassette with three directional couplers 20 dB, in-out on rear, tap on front, 5~1218 MHz
D-BP

1-Slot Blank Panel 

  • DIMA-front
  • DIMA-3D
  • DIMA-back
  • DIMA-1U