[HamWAN PSDR] How to Aim Uplink on a Tower
Doug Kingston
dpk at randomnotes.org
Sat Feb 1 12:38:35 PST 2020
I really like the idea of a tone feedback.
On Sat, Feb 1, 2020 at 10:20 AM Herb Weiner <herbw at wiskit.com> wrote:
> Thanks, Tom. I was not aware of the print oid command, bu t this looks
> very promising. We certainly will practice this.
>
> Herb
>
> On Feb 1, 2020, at 10:02 AM, Tom Hayward <tom at tomh.us> wrote:
>
> 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
>>>>
>>>>
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>>>> http://mail.hamwan.net/mailman/listinfo/psdr
>>>>
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