Dual RP-TNC in 1200 Radios

Answered Question
Nov 23rd, 2007

There somethig that i would like to understand..

what is the purpouse of a dual antenas in a 1240G.

I understand the diversity feature, but i dont understand the purpouse of dual antenas

in a 1240G radio.

Are two internal radios (one each antena) or is only one radio with two antenas...

how it work?

I have this problem too.
0 votes
Correct Answer by rob.huffman about 9 years 2 weeks ago

Hi Rafael,

Hope all is well with you :)

The 1240G has only one b/g radio and will have one set of Dual RP-TNC connectors in case you want to hook up two Antennas in Diversity Mode (as you nicely noted!) In many cases you will just use one Antenna connected to the Primary RP-TNC side.

The 1240A/B/G has only one b/g radio and one A radio and will have two sets of Dual RP-TNC connectors. One dual set for each radio in case you want to hook up two Antennas in Diversity Mode. In many cases you will just use one Antenna connected to the Primary RP-TNC side for b/g and one Antenna connected to the Primary RP-TNC side for A.

For the 1240G

Dual RP-TNC antenna connectors for 2.4-GHz radios

Antenna connectors support a variety of Cisco 2.4-GHz antennas, providing range and coverage versatility.

http://www.cisco.com/en/US/products/ps6521/products_data_sheet0900aecd80635208.html

For the 1240A/B/G

Dual RP-TNC Antenna Connectors for Both 2.4-GHz and 5-GHz Radios

Antenna connectors support a variety of Cisco 2.4-GHz and 5-GHz antennas, providing range and coverage versatility.

http://www.cisco.com/en/US/products/ps6521/products_data_sheet0900aecd8031c844.html

Cisco Aironet 2.4 GHz and 5 GHz Antennas and Accessories

http://www.cisco.com/en/US/products/ps6521/products_data_sheet09186a008022b11b.html

Hope this helps! And makes some sense :)

Rob

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scottmac Fri, 11/23/2007 - 07:11

It is one radio (802.11g) with two antennas, only one of them is active at any given time (antenna A is Tx/Rx OR antenna B is Tx/Rx). Thre is only one path to the radio, and only one antenna can occupy that path at a time.

Then there may be also an 802.11a radio with either an integrated "padddle" antenna or another version of that radio has two antenna jacks.

Both radios have two antennas to enable Diversity; basically two views of the SAME AREA to reduce the chances of Nulls and minimize multipath effects.

Good Luck

Scott

Correct Answer
rob.huffman Fri, 11/23/2007 - 07:23

Hi Rafael,

Hope all is well with you :)

The 1240G has only one b/g radio and will have one set of Dual RP-TNC connectors in case you want to hook up two Antennas in Diversity Mode (as you nicely noted!) In many cases you will just use one Antenna connected to the Primary RP-TNC side.

The 1240A/B/G has only one b/g radio and one A radio and will have two sets of Dual RP-TNC connectors. One dual set for each radio in case you want to hook up two Antennas in Diversity Mode. In many cases you will just use one Antenna connected to the Primary RP-TNC side for b/g and one Antenna connected to the Primary RP-TNC side for A.

For the 1240G

Dual RP-TNC antenna connectors for 2.4-GHz radios

Antenna connectors support a variety of Cisco 2.4-GHz antennas, providing range and coverage versatility.

http://www.cisco.com/en/US/products/ps6521/products_data_sheet0900aecd80635208.html

For the 1240A/B/G

Dual RP-TNC Antenna Connectors for Both 2.4-GHz and 5-GHz Radios

Antenna connectors support a variety of Cisco 2.4-GHz and 5-GHz antennas, providing range and coverage versatility.

http://www.cisco.com/en/US/products/ps6521/products_data_sheet0900aecd8031c844.html

Cisco Aironet 2.4 GHz and 5 GHz Antennas and Accessories

http://www.cisco.com/en/US/products/ps6521/products_data_sheet09186a008022b11b.html

Hope this helps! And makes some sense :)

Rob

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