What is minimum DSL/4G speed for acceptabel remote operation w SDR 1.4 LAN

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The new LAN software seems to open new possibilities for remote DX-ing. Today remote operation of a "traditional non SDR TRX " is feasible with low speed internet access networks like DSL and less than 1 Mbit/s uplink. Even as low as 250 kbit/ s is fessible for full remote operation and controlling of TRX, amplifiers and rotors at remote QTH. Now 4G is rolled out with considerable higher speeds and low latencies. With a new Flex radio and LAN software what is the minimum WAN speed needed on the internet access link for a basic acceptable dual receiving operation (no waterfalls or other bandwidht requiring features)? Or in other words - with e g maximum 2 Mbit/s down and uplink what functions of a Flex radio setup and the new remote LAN software can not be achieved? Will the receivers performance (dynamic range) for strong signals be degraded with this low bandwidth for remote operation?
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Kari Gustafsson SM0HRP, Elmer

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Posted 3 years ago

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Al K0VM, Elmer

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Karl,
   The amount of network loading depend a bit on how you have much you have configured..
for example: One panadapter with one Slice and remote enabled might be 1.3 Mbps of sustained network data.  But that also depend on the size of the graphics area and update rate.   Each additional PA adds another 0.6 Mbps , Each DAX channel adds another 1.5 Mbps

 Since the DSP is in the radio, the network will have no effect on the dynamic range

AL, K0VM
(Edited)
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Kari Gustafsson SM0HRP, Elmer

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Hi Al,
Thanks for reply. As you understand I am a total novice on SDR:s. So assuming you would like to use the SDR as a conventional TRX in split mode (VFO A and B) and listen with diversity and nothing else (like pan adapter) in an acceptable audio quality that would require a minimum of a couple of Mbps then?
Sorry if my Q in a SDR technical jargon is unclear.
Best 73s Kari SM0HRP
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KY6LA - Howard, Elmer

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Kari
Lots of us are using iPad's and iPhones to run the Flex Remote over 3G and 4G LTE

It works well... with full panadapters and audio
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Al K0VM, Elmer

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Karl,
  if you take 1 PA down to 1 fps and the waterfall down to 1 update per second,  then with remote on the network sees about 20 Kbps in receive.

AL, K0VM
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Kari Gustafsson SM0HRP, Elmer

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Hi Al, Thanks for info. Sounds really god. So scaling up the updates per second would imply a linear increase in bandwidth required ? So in typical dx pile- up in split and diversity on one band with say 10 updates per second would require 10 x 20 x 2 (diversity) = 400 kbits?
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Al K0VM, Elmer

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Karl,
    Its not linear.. The 20KBps for 1fps includes other fixed overhead..  The network traffic also is dependent on the number of pixels in the SSDR display area..
Adding additional RX slice adds very little to the network traffic.
 
   Another data point.  SSDR on a 1920x1080 display with 2 RX slices in 1 panadapter at 10 fps ( WF at 1 update /sec ) and remote audio, uses about 50KBps of network. MostDX splits can run in one panadapter.

I guess 50KBytes/sec = 400Kbits/sec

AL, K0VM
p.s my previous post should have stated 20 KBps.