VSATplus International Inc.

Comtech Skywire MDX-420 Satellite Network Gateway

1 In stock

L-Band Modems

Comtech EF Data

Typical Users • Oil & Gas• SNG Operators• Enterprise• Government & Military Common Applications • IP-Centric Applications• Full Mesh Data & Voice• Bandwidth on-Demand Video, Voice & IP• Communications on- the-Move / Pause Overview The revolutionary SkyWire™ MDX420 is one of the most innovative satellite products. The system combines the...
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Typical Users
• Oil & Gas
• SNG Operators
• Enterprise
• Government & Military
Common Applications
• IP-Centric Applications
• Full Mesh Data & Voice
• Bandwidth on-Demand Video, Voice & IP
• Communications on- the-Move / Pause


The revolutionary SkyWire™ MDX420 is one of the most innovative satellite products. The system combines the throughput and robustness of a single channel per carrier (SCPC) system with the bandwidth savings of a time division multiple access (TDMA) system.
The SkyWire MDX420 leverages the benefits of each to provide the ultimate in satellite network performance.
The SkyWire MDX420 is the first TDMA broadband satellite system to eliminate the need for high stability references or an expensive central hub with complicated system software. With its revolutionary single hop bandwidth-on-demand capability, the SkyWire MDX420 minimizes system response time to changes in traffic flow. The small efficient burst sizes and ultra low overhead allow the SkyWire MDX420 to provide unprecedented bandwidth efficiency and increased network throughput.
The SkyWire MDX420 system is easy to configure and the auto-everything 10/100/1000 terrestrial data ports provide instant connectivity for any IP application.

Whether you need a TRUE full mesh, a hub and spoke, or a hybrid combination, the SkyWire MDX420 system provides the most cost-effective, easy to use, bandwidth efficient solution available today. And, the system is packaged in a single, secure, one rack unit box.


  • Most bandwidth-efficient TDMA solution available
  • Connect remote sites in a TRUE full mesh, hub and spoke, or hybrid network configuration
  • TDMA network throughput capability of over 86 Mbps and 168,000 pps
  • Multiple Link / Multiple transponder operation
  • Advanced Turbo Product Code FEC
  • Dynamic bandwidth allocation with single hop bandwidth-on-demand functionality
  • Programmable, multi-queued Quality of Service (QoS)
  • Graphical user interface program for monitor and control


The published specifications reflect the maximum SkyWire MDX420 performance. Each SkyWire MDX420 can be configured to customer requirements via hardware / software options applied at the factory or in the field.

SkyWire MDX420 Performance

Modulation &
User Data
Rate Range
BER 1E-8
Enhanced QPSK .710 328 kbps -
12.7 Mbps
2.9 dB 3.5 dB
Enhanced QPSK .793 328 kbps -
14.2 Mbps
3.3 dB 3.8 dB
Standard QPSK .793 328 kbps -
14.7 Mbps
3.4 dB 4.4 dB
Enhanced 8PSK .793 537 kbps -
20.9 Mbps
6.5 dB 7.6 dB
Standard 8PSK .793 555 kbps -
21.6 Mbps
6.5 dB 7.6 dB



QPSK (8PSK optional)

L-Band Tuning Range

950 to 1750 MHz in 1 Hz steps


50 Ohm


N-Type (50 Ohm)

Return Loss

10 dB minimum

Output Power

0 to -25 dBm

Output Accuracy

±1.0 dB over frequency and temperature


-55 dBc In-band

-45 dBc Out-of-band


-45 dBc

On/Off Power Ratio

>60 dB

Symbol Rate Range

.256 to 10 Msps in 1 sps steps


Turbo Product Code .710, .793

Internal Stability

± 280 ppB

± 50 ppB (optional)

Optional BUC Power:

3.3 Amps @ 24 V maximum

2.8 Amps @ 48 V maximum

BUC Reference

10 MHz, +3 dBm ± 3 dB




QPSK (8PSK optional)

L-Band Tuning Range

950 to 2050 MHz in 1 Hz steps


75 Ohm


F-Type (75 Ohm) female

Return Loss

10 dB minimum

Input Level

10 x Log (symbol rate) -122 ± 12 dB

Total Input Power

-10 dBm or +40 dBc (the lesser)

Symbol Rate Range

.256 to 10 Msps in 1 sps steps


Turbo Product Code .710, .793

Carrier Acquisition Range

± 5% of the symbol rate

LNB DC Power

500 mA @ 24 VDC maximum

LNB Reference

10 MHz, +3 dBm ± 3 dB

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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