What if One FM Johor Bahru frequency 105.3MHz is transmitted from Gunung Pulai?

One FM Johor Bahru frequency was launched on November 2011 on FM 105.3MHz. It is transmitted from TM Taman Sentosa, Johor Bahru.

Due to no empty frequency is available in Gunung Pulai, one FM is awarded on 105.3MHz in Taman Sentosa, Johor Bahru.

In Johor, FM 105.3MHz is not only used for Johor Bahru by one FM, but 105.3MHz is also used by RTM Johor FM for North Johor areas from Gunung Ledang. 6 years ago, I was thinking if One FM 105.3MHz is transmitted from Gunung Pulai.

Actually RTM Johor FM used 105.3MHz in Gunung Ledang since 1980s for North Johor areas. If one FM uses 105.3MHz in Gunung Pulai, this will create co-channel interference between Johor FM and One FM in Central Johor such as Batu Pahat, Kluang, Yong Peng, even Pagoh may receive CCI. I was making inquiry with RTM broadcast engineers regarding this issue if happen, I was told that there was no problem when one FM 105.3MHz uses in Gunung Pulai if one FM never beams 105.3MHz Gunung Pulai signal to north direction.

"If one FM 105.3 and Johor FM 105.3 are interfering each other in affected areas (notably Central Johor), Johor FM listeners can tune to 101.9MHz from Gunung Pulai, meanwhile One FM listeners can tune to 88.1MHz from Gunung Ledang.", said RTM. (2012)

Since there is excellent feedback, I also think no problem as One FM and Johor FM have alternative frequency. This reflects me about Minnal FM Gunung Kledang 98.9MHz and 988 FM Gunung Ulu Kali 98.8MHz in South Perak.

"Minnal FM 98.9MHz and 988 FM 98.8MHz are clashing each other in South Perak. 988 FM listeners can tune to FM 99.8MHz from Gunung Kledang, meanwhile Minnal FM listeners can tune either 96.3MHz from Gunung Ulu Kali or 107.9MHz Bukit Larut in affected areas."

But when comes to MCMC, I think if I proposed Gunung Pulai on FM 105.3MHz, I strongly believe that the suggestion will be rejected by MCMC as it does not comply with the minimum frequency separation which set up by MCMC. Gunung Ledang and Gunung Pulai must be separated their frequencies at least 200kHz.

If One FM 105.3MHz is transmitted from Gunung Pulai for JB and beam signal to south direction only, basically Johor Bahru and Singapore can get better reception, but there may create co-channel interference to Radio Canggai Putri FM 105.3MHz coverage in Karimun Island, Indonesia. Marina Bay of Singapore may receive co-channel interference on FM 105.3MHz.

==RF analysis==

105.3MHz: one FM Gunung Pulai (Johor Bahru only by beaming south direction)
105.3MHz: Johor FM Gunung Ledang (North Johor only)
<0kHz, not recommended>

105.1MHz: RRI Batam Pro-1
105.3MHz: one FM Gunung Pulai (Johor Bahru only by beaming south direction)
<200kHz, OK>

105.3MHz: one FM Gunung Pulai (Johor Bahru only by beaming south direction)
105.5MHz: RRI Batam Pro-2
<200kHz, OK>

104.9MHz: Ai FM Gunung Pulai
105.3MHz: one FM Gunung Pulai (Johor Bahru only by beaming south direction)
<400kHz, OK>

105.3MHz: one FM Gunung Pulai (Johor Bahru only by beaming south direction)
105.7MHz: Nasional FM Gunung Pulai
<400kHz, OK>

105.3MHz: one FM Gunung Pulai (Johor Bahru only by beaming south direction)
105.3MHz: Radio Canggai Putri from Karimun Indonesia
<0kHz, NOT OK. Co-channel interference>

In conclusion, because Radio Canggai Putri is using FM 105.3MHz in Karimun which cause Singapore can receive the radio station with weaker reception. I don't think one FM can use 105.3MHz in Gunung Pulai, even it has co-channel interference with Johor FM 105.3MHz from Gunung Ledang. Therefore, 105.3MHz is better to be transmitted from current TM Taman Sentosa tower for Johor Bahru.

==Minimum frequency separation of Gunung Pulai with other surrounding Tx sites==
- Singapore: 0.4MHz
- Batam Indonesia: 0.2MHz
- Karimun Indonesia: 0.2MHz
- Gunung Ledang: 0.2MHz
- Bukit Tinggi: 0.2MHz
- Gunung Telapak Burok: 0.1MHz
- Bukit Tampin: 0.1MHz
- Taman Sentosa: 0.4MHz
- Sedilli: 0.3MHz