Until today, the frequency FM 102.0MHz or FM 102.1MHz is still vacated in Negeri Sembilan and one of them is not occupied by any radio station for Gunung Telapak Buruk transmission to cover Seremban, Kuala Pilah, Jelebu, Jempol, Port Dickson and Rembau.
I never saw MCMC assigned 102.0 or 102.1 to any radio broadcaster for Gunung Telapak Buruk radio transmission during 15 years observation.
Many years ago, I observed that FM 102.1MHz as the empty radio frequency and I think that it could be used in Seremban, Negeri Sembilan (Gunung Telapak Buruk) since 2008 when I was just a Form 2 student at a high school during that time. So, I nominated this frequency to Media Prima for One FM Seremban frequency transmission (later Kool FM in 2016).
I thought Media Prima could use FM 102.1MHz in Gunung Telapak Buruk for One FM (now as 8FM) or Kool FM (now as Buletin FM). Until today, none of them is assigned FM 102.0MHz or FM 102.1MHz there.
I deeply studied the frequency interference analysis via simulation test and on site radio DXing. In fact, FM 102.0MHz or FM 102.1MHz Gunung Telapak Buruk transmission can cause interference to Melaka FM 102.3MHz Gunung Ledang and Johor FM 101.9MHz Gunung Pulai coverage in Central Johor and Northwest Melaka respectively.
RF analysis:
101.8MHz: MY FM Gunung Ulu Kali
101.9MHz: Johor FM Gunung Pulai
102.0MHz: Gunung Telapak Buruk
Each stations are having 100kHz separation. Johor FM 101.9MHz will get more interference.
==FM 102.0MHz Gunung Telapak Buruk vs. Johor FM 101.9MHz Gunung Pulai==
1. Johor FM broadcasts on 3 frequencies to cover the entire state such as FM 101.9MHz Gunung Pulai, FM 105.3MHz Gunung Ledang and FM 92.1MHz Bukit Tinggi. In Central Johor areas such as Batu Pahat, Kluang, Parit Sulong, Yong Peng, Parit Raja and Sri Gading, Johor FM tuning frequencies are 105.3 and 101.9. Central Johor is the neutral location for 105.3 and 101.9 transmission. In Batu Pahat, basically Johor FM is tuned on 105.3MHz from Gunung Ledang, but the radio station tuning frequency is 101.9MHz from Gunung Pulai in several locations within Batu Pahat district when 105.3MHz Gunung Ledang signal is not clear. Hence, 101.9MHz Gunung Pulai is to cover the blind spot of FM 105.3MHz Gunung Ledang in Central Johor.
2. Johor FM 101.9MHz also backs up Pagoh when 105.3MHz Gunung Ledang reception is not clear. When FM 105.3MHz Gunung Ledang reception is weak in Pagoh and Yong Peng, listeners have to tune to Johor FM on 101.9MHz from Gunung Pulai. Studied that Gunung Telapak Buruk radio transmission can reach Pagoh, Johor FM 101.9MHz will be interfered by FM 102.0MHz Gunung Telapak Buruk there. Therefore, Johor FM has no clearer frequencies to be tuned in affected areas.
3. Johor FM 101.9MHz Gunung Pulai has adjacent channel interference with MY FM 101.8MHz from Gunung Ulu Kali in certain locations in Kluang. Listeners can tune on 105.3MHz from Gunung Ledang.
Gunung Telapak Buruk radio transmission actually can approach part of Batu Pahat and Kluang. When Johor FM 101.9MHz is being interfered by MY FM 101.8MHz from Gunung Ulu Kali, the interference will be worse if FM 102.0MHz is used in Gunung Telapak Buruk. This means Johor FM 101.9MHz will get more interference from FM 102.0MHz Gunung Telapak Buruk in Central Johor, alongside MY FM 101.8MHz Gunung Ulu Kali.
4. In Segamat, Johor FM is tuned on FM 105.3MHz from Gunung Ledang, meanwhile FM 101.9MHz Gunung Pulai is still available. Johor FM 101.9MHz Gunung Pulai reception is having interference with MY FM 101.8MHz Gunung Ulu Kali. Imagine if FM 102.0MHz is used in Gunung Telapak Buruk, Johor FM 101.9MHz is completely interfered in Segamat, Johor until Kluang.
==FM 102.1MHz Gunung Telapak Buruk vs. Melaka FM 102.3MHz Gunung Ledang==
1. RTM Melaka FM broadcasts only with 1 frequency to cover the entire Melaka state on FM 102.3MHz from Gunung Telapak Buruk, and it has no alternative frequency in Melaka as 102.3 covers Melaka perfectly.
In Northwest Melaka such as Masjid Tanah, Lubuk Cina, Kuala Sungai Baru, and Sungai Udang, Gunung Telapak Buruk radio stations can be received clearly, somewhat its signal is stronger than Gunung Ledang in those stated locations.
FM 102.1MHz Gunung Telapak Buruk radio transmission can cause interference to Melaka FM 102.3MHz Gunung Ledang coverage in Northwest Melaka as both frequency separation are at 200kHz. For this case, it is better to separate at 300kHz.
When Melaka FM 102.3MHz Gunung Ledang coverage is interfered by FM 102.1MHz Gunung Telapak Buruk transmission in Masjid Tanah, Sungai Udang, Kuala Sungai Baru and Lubuk Cina, Melaka FM's listeners in affected areas have no alternative frequency to tune the broadcast. Hence, this can anger the listeners due to interference.
Unless Melaka FM has alternative frequency, so the interference to Melaka FM 102.3MHz by FM 102.1MHz Gunung Telapak Buruk is no longer an issue.
102.1MHz: Gunung Telapak Buruk
102.3MHz: Melaka FM Gunung Ledang
<200kHz> (Melaka FM 102.3MHz can face interference in Masjid Tanah, Lubuk Cina, Kuala Sungai Baru and Sungai Udang)
==Conclusion==
With the studies and findings above, FM 102.0MHz and FM 102.1MHz are not suitable for Gunung Telapak Buruk radio broadcast transmission.
As today, FM 102.1MHz is only used for Sepang Grand Prix low power radio commentary broadcast when there is race event.
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