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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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UMTS Model Tuning - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

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 Post subject: UMTS Model Tuning
Posted: Fri Aug 08, 2008 12:05 pm 

Joined: Thu Feb 15, 2007 5:38 am

Posts: 6


Regarding UMTS Model Tuning

In my project for UMTS model tuning,

We performed CW measurements using the following:

Nemo outdoor 4 to collect RSSI, Omni antenna transmitting at 2127.5 MHz with 43 dBm

Now the customer asked us to validate the model using the following:

TEMS data collection 8.2.1 for live sites to pick up RSCP using Directive antennas (3 Sectors with mechanical and electrical tilt) transmitting at 2122.4 MHz

- My questions, is that logic to validate our model by receiving modulated signals transmitted from tilted directive antenna while our model was built depending on unmodulated signals transmitted from Omni antenna with zero tilt.

Another points,

- What are the rule of modifying the through clutter losses and clutter offsets values? When should I give it positive values and when should I give it negative values?


For TEMS drive test,

- Could we use the mobile handset as a scanner instead of the common RF scanner?

- I tried to collect data in the Idle mode and I noticed that there's a difference between TEMS route "shown in TEMS Map window" and exported log file table "shown in MapInfo".......the difference is just a repeated data which cause nonsense, so why I got these repeated data? And how could I disable it?

Please advice

Posted  11/12/2012

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