[HamWAN PSDR] How to Aim Uplink on a Tower
Tom Hayward
tom at tomh.us
Sat Feb 1 10:02:06 PST 2020
I have never heard of Aim Master.
The Mikrotik command to learn OIDs is "print oid". Example:
[tom at Baldi.Crystal] /interface wireless> print oid
0 tx-rate=.1.3.6.1.4.1.14988.1.1.1.1.1.2.2
rx-rate=.1.3.6.1.4.1.14988.1.1.1.1.1.3.2
strength=.1.3.6.1.4.1.14988.1.1.1.1.1.4.2 ssid=
.1.3.6.1.4.1.14988.1.1.1.1.1.5.2
bssid=.1.3.6.1.4.1.14988.1.1.1.1.1.6.2
frequency=.1.3.6.1.4.1.14988.1.1.1.1.1.7.2
band=.1.3.6.1.4.1.14988.1.1.1.1.1.8.2
[tom at Baldi.Crystal] /interface wireless> registration-table print oid
0 signal-strength=.1.3.6.1.4.1.14988.1.1.1.2.1.3.212.202.109.98.213.93.2
tx-signal-strength=.1.3.6.1.4.1.14988.1.1.1.2.1.19.212.202.109.98.213.93.2
tx-bytes=.1.3.6.1.4.1.14988.1.1.1.2.1.4.212.202.109.98.213.93.2
rx-bytes=.1.3.6.1.4.1.14988.1.1.1.2.1.5.212.202.109.98.213.93.2
tx-packets=.1.3.6.1.4.1.14988.1.1.1.2.1.6.212.202.109.98.213.93.2
rx-packets=.1.3.6.1.4.1.14988.1.1.1.2.1.7.212.202.109.98.213.93.2
tx-rate=.1.3.6.1.4.1.14988.1.1.1.2.1.8.212.202.109.98.213.93.2 rx-rate=
.1.3.6.1.4.1.14988.1.1.1.2.1.9.212.202.109.98.213.93.2
routeros-version=.1.3.6.1.4.1.14988.1.1.1.2.1.10.212.202.109.98.213.93.2
uptime=.1.3.6.1.4.1.14988.1.1.1.2.1.11.212.202.109.98.213.93.2
signal-to-noise=.1.3.6.1.4.1.14988.1.1.1.2.1.12.212.202.109.98.213.93.2
tx-signal-strength-ch0=
.1.3.6.1.4.1.14988.1.1.1.2.1.13.212.202.109.98.213.93.2
signal-strength-ch0=.1.3.6.1.4.1.14988.1.1.1.2.1.14.212.202.109.98.213.93.2
tx-signal-strength-ch1=
.1.3.6.1.4.1.14988.1.1.1.2.1.15.212.202.109.98.213.93.2
signal-strength-ch1=.1.3.6.1.4.1.14988.1.1.1.2.1.16.212.202.109.98.213.93.2
tx-signal-strength-ch2=
.1.3.6.1.4.1.14988.1.1.1.2.1.17.212.202.109.98.213.93.2
signal-strength-ch2=
.1.3.6.1.4.1.14988.1.1.1.2.1.18.212.202.109.98.213.93.2
Once you have found enough signal to maintain a connection, exit out of
scan and use mon for much better data. It will show you both chains.
[tom at haystack.evergreenmonroe] > /in wi mon 0
status: connected-to-ess
channel: 5880/10/an
wireless-protocol: nv2
tx-rate: 43.3Mbps-10MHz/2S/SGI
rx-rate: 52Mbps-10MHz/2S
ssid: HamWAN
bssid: 6C:3B:6B:5D:5E:17
radio-name: Haystack-S3/K7WAN
signal-strength: -67dBm
signal-strength-ch0: -69dBm
signal-strength-ch1: -71dBm
tx-signal-strength: -68dBm
tx-signal-strength-ch0: -71dBm
tx-signal-strength-ch1: -71dBm
noise-floor: -118dBm
signal-to-noise: 51dB
tx-ccq: 80%
rx-ccq: 79%
authenticated-clients: 1
current-distance: 22
wds-link: no
bridge: no
routeros-version: 6.46
last-ip: 192.241.235.209
current-tx-powers:
6Mbps:27(27/30),9Mbps:27(27/30),12Mbps:27(27/30),18Mbps:27(27/30),24Mbps:27(27/30),36Mbps:27(27/30),48Mbps:25(25/28),54Mbps:24(24/27),HT20-0:27(27/30),HT20-1:27(27/30),
HT20-2:27(27/30),HT20-3:27(27/30),HT20-4:27(27/30),HT20-5:27(27/30),HT20-6:25(25/28),HT20-7:23(23/26)
notify-external-fdb: no
Practice on the ground if you've never done it before.
Tom KD7LXL
On Wed, Jan 29, 2020 at 5:52 PM Kenny Richards <richark at gmail.com> wrote:
> I have not used the Aim Master, but I would be surprised if it isn't
> operating off the same data being provided by the scan. As someone who has
> done a fair amount of the tower work, you really don't want to have them
> trying to manage anything additionally like watching a display.(regardless
> of what display) That is why having the pre-defined interactions between
> the ground person (who can completely focus on the data) and the tower
> person is the best solution.
>
>
>
> On Wed, Jan 29, 2020 at 4:53 PM Herb Weiner <herbw at wiskit.com> wrote:
>
>> Thanks, Kenny. This is the same technique we have used (except without
>> the HTs) when we are setting up a dish on a tripod, but I was really hoping
>> that there was a better way. And it is quite possible that the tower
>> climber will have experience with this. At this point, we don't know who
>> the tower climber will be, since KOIN requires that we use climbers
>> approved by them.
>>
>> I agree that scan sucks. Also, for aiming, an analog display really would
>> work better than a digital display. That is why I was hoping that I could
>> get Aim Master to work. (If anyone can tell me what some suitable SNMP OIDs
>> for aiming an antenna, I will try to update Aim Master. Perhaps this would
>> be a better solution.)
>>
>> Herb
>>
>> On Jan 29, 2020, at 4:32 PM, Kenny Richards <richark at gmail.com> wrote:
>>
>> Herb,
>>
>> The approach which has always been used when I have been involved uses
>> the output of /interface wireless scan 0, but it really requires two
>> people.
>>
>> 1) person on tower preps the dish and does their best to aim it in the
>> right direction. They report to ground (usually via a HT) that they are
>> ready.
>> 2) person on ground that is logged into radio, issues the scan command.
>> 3) The ground person at this point is in control and should be doing
>> almost all the talking. (which is good, because the person the tower needs
>> both hands aiming the dish)
>> 4) ground person reads the signal level, whether they see a connection or
>> not, etc. They need todo this continually, because the person on the
>> tower is completely operating on what they are being told. This means you
>> keep swing in one direction until the ground person tells you to stop and
>> go back the other direction.
>> 5) remember that you will need to adjust horizontal and vertical
>> multiple times to fine tune the signal.
>> 6) also remember the scan sucks and will 'stop' updating when it looses
>> the signal.
>> 7) the tower person has to try and go as slow and steady as possible when
>> adjusting.
>>
>> If you are using a professional tower climber, get a set of FRS radios or
>> something to send up with them. I'd be surprised if the pro's haven't done
>> this general alignment before, but that is just a guess.
>>
>> Kenny
>>
>>
>>
>> On Wed, Jan 29, 2020 at 1:53 PM Herb Weiner <herbw at wiskit.com> wrote:
>>
>>> In the near future, Oregon HamWAN (http://www.oregonhamwan.org) will
>>> be deploying three sectors and an uplink (aimed at Larch Mountain) on the
>>> KOIN Tower in Southwest Portland.
>>>
>>> What is the best way to optimize the aiming of our uplink? I am familiar
>>> with the use of /interface wireless scan 0, but it is difficult to
>>> optimize the signal strength using the output of this command.
>>>
>>> Aim Master (https://github.com/HamWAN/aim) looked like a promising
>>> approach, but it appears as if this has not been updated since 2016, and it
>>> appears to use SNMP MIBs that are no longer supported by the current
>>> firmware.
>>>
>>> We need to provide instructions for a professional tower climber that
>>> will probably have limited, if any, experience with HamWAN.
>>>
>>> Thanks for your suggestions.
>>>
>>> Herb, AA7HW
>>>
>>>
>>> _______________________________________________
>>> PSDR mailing list
>>> PSDR at hamwan.org
>>> http://mail.hamwan.net/mailman/listinfo/psdr
>>>
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