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DPX1 Series
Cable Network Diplexer

 
 
    Features
 
* CE Approved

* High Performance

* Low Insertion Loss

* High Rejection

* Excellent Return Loss

* DC Blocked

* Suitable for Cable Network System
Introduction

Currently Cable Network systems usually use a 2-way splitter to combine or separate the signals for upstream and downstream.

Since 2-way splitters cannot isolate the two bands effectively, interference between the upstream and downstream often becomes a problem

To solve this problem correctly, replace the 2-way splitter with a diplexer for upstream and downstream bands.

The DPX1-42/54 is a newly designed, high performance Cable Network diplexer. It offers many features:

1. Lowest insertion loss: Upstream and Downsterm bands through-loss <1.0dB reduced to
    absolute minimum.

2. Excellent return loss: Better than 16dB in essential for Upstream and Downsterm bands to
    provide a good match of impedance so as avoid an increased in noise and to reduce signal
    loss to keep the signal clean.

3. High rejection: Better than 45dB provides a good isolation and avoids interference.

The Upstream and Downstrem bands can be chosen according to customer specifications.

- Technical Note -
 * Upstream band : 5 - 45MHz (North American)
 * Upstream band : 6 - 65MHz (EUROPE)
 * Downstream band : 54 - 806MHz (North American)
 * Downstream band : 85 - 862MHz (EUROPE)
 * The 2-way splitter insertion loss is 3.5 to 4dB and isolation is 20dB with normal specifications.

  Items
Model Upstream Band Downstream Band
DPX1-30/47 5 - 30 MHz 47 - 1000 MHz
DPX1-42/54 5 - 42 MHz 54 - 1000 MHz
DPX1-50/65 5 - 50 MHz 65 - 1000 MHz
DPX1-55/70 5 - 55 MHz 70 - 1000 MHz
DPX1-65/85 5 - 65 MHz 85 - 1000 MHz
DPX1-85/108 5 - 85 MHz 108 - 1000 MHz
DPX1-204/258 5 - 204 MHz 258 - 1250 MHz
  Electrical Curve (DPX1-42/54)

Insertion Loss  |  Return Loss
Upstream Band
Fig. 1

Insertion Loss  |  Return Loss
Downstream Band
Fig. 2

Insertion Loss  |  Return Loss
Close-up fig. 1
Fig. 3

Insertion Loss  |  Return Loss
Close-up fig. 2
Fig. 4
  General Specifications
  Item DPX1 - 42 / 54
  Impedance 75 ohm
  Frequency Range 5 - 42MHz 54 - 1000MHz
  Insertion Loss 0.5dB (typ) / 2.0dB (max) 0.5dB (typ) / 2.0dB (max)
  Return Loss 20dB (typ) / 14dB (min) 20dB (typ) / 14dB (min)
  Rejection (Isolation) 50dB (typ) / 45dB (min) 50dB (typ) / 45dB (min)
  Dimensions 18(H) x 74.5(W) x 33(D) mm
  Net Weight 60g
   * Specifications are subject to change without notice.
[Table 1]

 

 
 

SOONTAI  TECH  CO.,  LTD.
No.43, Huangong Rd., Yongkang Dist., Tainan City 710, Taiwan
TEL: 886-6-2016969   FAX: 886-6-2013939   E-mail: soontai@soontai.com