[HamWAN PSDR] optimization first results

Bart Kus me at bartk.us
Fri Nov 1 15:36:10 PDT 2019

Yes, much better.  I also noticed a problem on the HamWAN side, where 
that sector was configured for only 5MHz service instead of our normal 
10MHz.  I've changed the sector config, and you should be getting twice 
the bandwidth now.

I tried to run a speed test, but noticed your bandwidth-server was still 
set to require authentication, so I've logged into your modem and turned 
that off:

[eo at K7ITE-Lookout] > /tool bandwidth-server set authenticate=no

I also noticed you still have an "admin" account.  If it's not properly 
password protected, this may be dangerous now that your modem is on the 
Internet.  I have left it untouched.

I also noticed you have the "winbox" service running.  This is also 
dangerous, as it's full of exploits.  I have left it untouched, but you 
should probably disable it.  (/ip service disable winbox)  We should 
update the website instructions to disable this by default.

I also noticed your ssh is on port 22.  This will get more hacking 
attempts than port 222.  You can change it with /ip service set ssh 

With the bandwidth-server available on your end, I ran a speed test from 
the sector to your modem:

[eo at Lookout-S2] > /tool bandwidth-test duration=30s 
                 status: running
               duration: 29s
             tx-current: 38.4Mbps
   tx-10-second-average: 35.6Mbps
       tx-total-average: 37.5Mbps
            random-data: no
              direction: transmit
                tx-size: 1500
       connection-count: 20
         local-cpu-load: 20%
        remote-cpu-load: 28%

[eo at Lookout-S2] > /tool bandwidth-test duration=30s 
                 status: running
               duration: 29s
             rx-current: 40.8Mbps
   rx-10-second-average: 41.7Mbps
       rx-total-average: 35.7Mbps
           lost-packets: 1285
            random-data: no
              direction: receive
                rx-size: 1500
       connection-count: 20
         local-cpu-load: 21%
        remote-cpu-load: 27%

This is the performance you can expect from a 10MHz MIMO link that has 
good signal.

The current-distance is reported in km, not miles.  It's not round-trip 
distance, just physical distance between the modems. There is a separate 
metric for round-trip-time, which is measured in microseconds: 
tdma-timing-offset=202.  You can do the speed-of-light math to get a 
more precise distance than the 1km granularity reported by the 
"current-distance" field.


On 11/1/2019 3:18 PM, Ric Merry wrote:
> tx-rate: 6.5Mbps-5MHz/2S
>                  rx-rate: 3.2Mbps-5MHz/1S
>                     ssid: HamWAN
>                    bssid: 74:4D:28:57:F6:BA
>               radio-name: Lookout-S2/WA7DEM
>          signal-strength: -62dBm
>      signal-strength-ch0: -64dBm
>      signal-strength-ch1: -66dBm
>       tx-signal-strength: -62dBm
>   tx-signal-strength-ch0: -66dBm
>   tx-signal-strength-ch1: -64dBm
>              noise-floor: -124dBm
>          signal-to-noise: 62dB
>                   tx-ccq: 35%
>                   rx-ccq: 19%
>    authenticated-clients: 1
>         current-distance: 32
> Mo' betta? Is current distance miles in both send and receive (round 
> trip)?
> On Fri, Nov 1, 2019 at 3:06 PM Bart Kus <me at bartk.us 
> <mailto:me at bartk.us>> wrote:
>     No, you're missing an entire chain of the radio (ch1).  Do this to
>     enable both chains:
>     /interface wireless set 0 rx-chains=0,1 tx-chains=0,1
>     --Bart
>     On 11/1/2019 2:55 PM, Ric Merry wrote:
>>     I climbed back up the ladder to do some fine tuning (thanks for
>>     the advice here)
>>     Luckily I could remotely view my computer with my cell phone thus
>>     saving me the cost of a divorce attorney had I asked my wife to
>>     help me when she gets home from work.
>>     ;)
>>     These are my results, I can do more but for now, how do they look?
>>     signal-strength: -66dBm
>>          signal-strength-ch0: -66dBm
>>           tx-signal-strength: -67dBm
>>       tx-signal-strength-ch0: -67dBm
>>       tx-signal-strength-ch1: -89dBm
>>                  noise-floor: -123dBm
>>              signal-to-noise: 57dB
>>                       tx-ccq: 88%
>>                       rx-ccq: 70%
>>        authenticated-clients: 1
>>             current-distance: 32
>>     Funny things is that thee are about where I started. Elevation is
>>     the more difficult adjustment with the brackets provided. I may
>>     end up modifying those.
>>     _______________________________________________
>>     PSDR mailing list
>>     PSDR at hamwan.org  <mailto:PSDR at hamwan.org>
>>     http://mail.hamwan.net/mailman/listinfo/psdr

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