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    Certificate TW12/11128



Satellite-IF / TV Diplexers
DPX1 series


* Wideband, up to 2.3 GHz

* Flat Passband

* Low Loss

* High Rejection

* Excellent Return Loss

* High Stability

* Die-casting Housing

* High RFI Shielding

* Precision Connector Thread

* Good Plating Quality

* Good Weather Resistance

In satellite reception systems, sometimes use a diplexer to combine or separate the satellite-IF and CATV or TV's VHF/UHF signals in order to reduce accessories and coaxial cable used (see illustration).

This will affect the signal quality and even generate interference if a poor quality diplexer is used.
Now, with our expertise, we offer you a better diplexer.

The DPX1 series is a newly designed, wideband, high performance diplexers. It offers many features:

1. Lowest insertion loss: VHF/UHF band through-loss <1.0dB and satellite-IF band through-loss <1.5dB, reduced the insertion loss to absolute minimum.

2. Excellent return loss: Better than 14dB is essential for VHF/UHF and satellite-IF bands to provide a good impedance match 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.

4. Closed cover panel and thick die-casting housing provides very good RFI shielding performance.

In addition to the general models in the table below, the TV/ CATV and satellite-IF bands can be designed according to customer specifications.

For more diplexer products, please see our diplexer category.



1. Use diplexers for system set-up.




2. Use diplexers for 4-way system set-up.


* The direction of diplexer function ports
   depends on actual diplexer.

Model TV/ CATV Band Satellite-IF Band
DPX1-770/1000 5 - 770 MHz 1000 - 2300 MHz
DPX1-862/950 5 - 862 MHz 950 - 2300 MHz
DPX1-1218/1350 5 - 1218 MHz 1350 - 2300 MHz
  Electrical Curve ( DPX1-862/950 )

Insertion Loss  |  Return Loss
Fig. 1

Insertion Loss  |  Return Loss
Satellite-IF Band
Fig. 2

Insertion Loss  |  Return Loss
Fig. 3

Insertion Loss  |  Return Loss
Satellite-IF Band
Fig. 4
  General Specifications
  Item DPX1 - 862 / 950
  Impedance 75 Ohm
  Frequency Range 10 - 862MHz 950 - 2300MHz
  Insertion Loss 0.5dB (typ) / 3.0dB (max) 1.0dB (typ) / 3.0dB (max)
  Return Loss 16dB (typ) / 10dB (min) 15dB (typ) / 10dB (min)
  Rejection (Isolation) 50dB (typ) / 25dB (min) 50dB (typ) / 35dB (min)
  Power Passing DC +30V / 500mA (max)
  Dimensions 18(H) x 74.5(W) x 33(D) mm
  Net Weight 60g
 * Specifications may be change depending on the model or customer's requirement.


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