R52Hn 21dbm or 25dbm?

RouterOS General
1

I ordered this card coz its manual read 25dbm and I have recieved one which shows 21 dbm on my 433AH. Why so?

2

If you check the datasheet, you will find this:
TX-Power = 25db @ 6M
TX-Power = 21db @ 54M

3

i am talking about default card rates after installing a new card and sector. i use my network at 2.4 b mode and when i chk the TX power in default it shows 21dbm. All other card show as i have been expecting like the R52H shows 25dbm in the same routerboard and in same settings.

Is it some new version of r52Hn.

4

there is no such thing as “default rate”. it depends on the data rate, as was quoted above. if no traffic is running, there is also nothing transmitting.

so:

TX-Power = 25db @ 6M
TX-Power = 21db @ 54M

5

But how come under same circumstances n same everything else the R52H shows 25dbm
the XR2 Shows 28dbm the Compex card shows 23dbm as they were rated on their datasheet.

And using R52Hn as MIMO can we have 2 - 120 deg sectors put side by side for TX and RX purpose
and do the CPE’s need to be set in similar manner. like seperate patch ant. for TX & RX or the normal CPE should be good enuff

6

Because R52H has 25dBm at 1Mbit data rate also, but R52Hn only has 25dBm at 54Mbit data rate.

Compare:

http://www.routerboard.com/pricelist/download_file.php?file_id=202
http://www.routerboard.com/pricelist/download_file.php?file_id=97

7

thanks normis ..

but does this mean that if we r using “b” mode the R52H is a better choice. Coz in my network if i enable “g” the latency goes high…CCQ goes low…Pthroughput goes down to 200-300k.
I havent seen the effects of MIMO so far so i wanted to try this out hence ordered the R52Hn. Or does it mean that R52Hn is for indoor networks .. Or campus/hotel Wifi sort of purposes and not for ISP use.

8

but does this mean that if we r using “b” mode the R52H is a better choice

If you mean transmitter power in b-mode only, the R52H is better by 1db (25db vs 24db).
It appears the R52Hn receiver section may be a little better.

9

and not for ISP use.

you said yourself that the output power is lower by one dB only if datarate is at it’s lowest. Why would ISP have idle links with no traffic on them? It’s most important when traffic is running, and in that case power is the same.

10

Thanks normis.. but i still need assurance about the above mentioned setup which I am planning. I mean if we have like 30 live clients on one Wireless Radio + Sector … can we take them upto 50+ by giving the additional sector for TX and RX…& assuming that all clients have bandwidth betn 256kbps and 512 kbps. And yes without changing the cPE on the client side becoz that wld mean a lot of expenditure.
Or it will not make ne difference if CPE’s r not changed.

11

R52Hn has better receive sensitivity, which is more important for low-end clients. They don’t have high output power, so the AP needs to “hear” better.

12

thnks guys …all this info ws good help