Wireless product max distance

RouterOS Wireless Networking
1

We played with wireless calculators a little, and came up with these tables.
The tables are based on perfect conditions - interference, weather, alignment will affect your real life results.

The data was taken from the product specifications, and entered into wireless calculators.
The table shows the max distance if you want to get max data rate at 802.11ac or 802.11n, and the max distance if you don’t care about speed. We used -70 as the signal for the high distance result, if lower signal is acceptable, you will get bigger distances.

Product to Product (same kind)
PDF: http://www.mikrotik.com/download/share/antenas.pdf
antenas-mantbox.png
Product to mANTBox 19
PDF: http://www.mikrotik.com/download/share/antenas_mantbox.pdf
antenas.png

Dear Experts Would you please help?
Help me choose
2

that tables are equivalent to the results of wireless link calculator tool?

http://www.mikrotik.com/test_link.php

3

Yes, that is what I wrote.

4

why some products dont have the white line of the best data-rate distance??

for example the lhg

5

White is for 802.11ac, and LHG does not support 802.11ac, only 802.11n

6

i think is a very good idea publishing this, a honesty proof of mikrotik

i am trying to recreate the lhg results on calculator but i dont obtain -70dbm what i am doing wrong??

lhg.jpg

7

For sure it will be very useful for people in order to select the proper equipment!

Cannot spot any mistakes (apart from obious :smiley: ) and calculated results are in line with real life experience after you factor in a reasonable real life derating.

@chechito: if you’re calculating for the LHG sensitivity at MCS7 is -75 not -80… and probably calculations are done around the optimal gain frequency, 5500?

We used -70 as the signal for the high distance result, if lower signal is acceptable, you will get bigger distances.

@normis: which frequency was used? Maximum distance parameters for 6Mbps G mode I assume?

8

thx for your response

i have updated de sensitivity value, still -63 of signal
lhg2.jpg

9

Chechito, what are you trying to find?
Max distance overall, or Max distance at MCS7?

If MCS7, enter these values:

TX: 19
RX: -75
Gain: 24
Frequency: 5442 (for example)

Then increase distance until it says Reliable. You will get what my table shows = 8km

If you want max distance, use not MCS7 but values from 6Mbit:

TX: 25
RX: -96

And increase until you reach -70.

10

@chechito: -70 signal parameters (maximum distance) are for 6Mbps G/MCS 0 mode (optimal Tx Power and sensitivity)

11

Yes, that is the max achievable distance at any speed, like I wrote in the first post (“if you don’t care about speed”)

12

I know, but had to ask, 6Mbps G != MCS 0 parameters on all devices.

13

i am trying to replicate this result
lhg3.jpg

14

I did not say MCS 0, I said minimum speed.

Here you go (Max speed is not based on -70 signal, it is based on “Reliable”)

15

thx for the explanation

i have just another doubt

that values apply for any channel width?? 5mhz 10mhz 20mhz 30mhz 40mhz 50mhz 80mhz etc??

if not how will be the correct way to adjust calculations for different channel width??

16

MCS7 = 300Mbit = 40MHz
MCS9 = 866Mbit = 80MHz

Those are specific values. Can’t set more.

17

I dont think so, because:

MCS9 with 80 MHz channel is 433 Mbps
MCS9 with 160 MHz channel is 867 Mbps

18

Not entirely correct. Your values are per stream. SXT is dual chain, so multiply it. On our dual chain devices (all devices in the above table), MCS9 = 80 = 866

19

This is only true for a single spacial stream case.

20

Sorry, im forgot. Really, MSC9 for 2S is 867.