Re: [Repeater-Builder] Noise Level on a Duplexer
Dear Eric, Thank you for your mail. Yes, we found that the interconnect T-Join between two system is heated up. Could we just cool down the T-Join for there is other way to solve this issue? Best Regards, Kent --- On Wed, 10/3/10, Eric Lowell elowell9...@yahoo.com wrote: From: Eric Lowell elowell9...@yahoo.com Subject: Re: [Repeater-Builder] Noise Level on a Duplexer To: Repeater-Builder@yahoogroups.com Date: Wednesday, 10 March, 2010, 8:54 PM Kent, I have seen this sort of problem before in a simaler application. I believe that your duplexer may have a bad internal connection, possibly at a fingerstock contact. In my case the problem was solved by replacing the duplexer. I believe the problem was caused by tuning the duplexer under power rather than with a network analyser. This occured many years ago, so my memory may be faulty. Best Regards de Eric (W1EL) Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband. net www.satnetmaine. com 207-210-7469 From: Kent Chong kentchongkm@ yahoo.com. sg To: Repeater-Builder@ yahoogroups. com Sent: Tue, March 9, 2010 10:31:30 AM Subject: Re: [Repeater-Builder] Noise Level on a Duplexer Dear Joe, Yes, we have observed the signal with a spectrum analyser. It is a broadband noise covering our entire TETRA band. Yes, the transmitter is keyed up continually. Regarding oscillation, what circuitry will develop the oscillation in 3 days? We are thinking about the heat problem too, as heat may be developed overtime. Best Regards, Kent --- On Tue, 9/3/10, Joe k1ike_m...@snet. net wrote: From: Joe k1ike_m...@snet. net Subject: Re: [Repeater-Builder] Noise Level on a Duplexer To: Repeater-Builder@ yahoogroups. com Date: Tuesday, 9 March, 2010, 8:52 PM Hello Kent, Have you looked at the noise on a spectrum analyzer? Is is broadbanded noise, or is it just on your receiver frequencies? If it is only on specific frequencies, is it frequency stable or does it drift around? Also, do any of your transmitters stay constantly keyed up? I'm wondering if something external to your system is oscillating. Your signals may be causing it to go into self-oscillation. When you shut your system off it stops. This is just a guess right now. 73, Joe, K1ike http://sg.rd. yahoo.com/ sg/mail/domainch oice/mail/ signature/ *http://mail. promotions. yahoo.com/ newdomains/ sg/ Get your new Email address! Grab the Email name you've always wanted before someone else does! New Email names for you! Get the Email name you#39;ve always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
Re: [Repeater-Builder] Noise Level on a Duplexer
Dear Joe, Yes, we have observed the signal with a spectrum analyser. It is a broadband noise covering our entire TETRA band. Yes, the transmitter is keyed up continually. Regarding oscillation, what circuitry will develop the oscillation in 3 days? We are thinking about the heat problem too, as heat may be developed overtime. Best Regards, Kent --- On Tue, 9/3/10, Joe k1ike_m...@snet.net wrote: From: Joe k1ike_m...@snet.net Subject: Re: [Repeater-Builder] Noise Level on a Duplexer To: Repeater-Builder@yahoogroups.com Date: Tuesday, 9 March, 2010, 8:52 PM Hello Kent, Have you looked at the noise on a spectrum analyzer? Is is broadbanded noise, or is it just on your receiver frequencies? If it is only on specific frequencies, is it frequency stable or does it drift around? Also, do any of your transmitters stay constantly keyed up? I'm wondering if something external to your system is oscillating. Your signals may be causing it to go into self-oscillation. When you shut your system off it stops. This is just a guess right now. 73, Joe, K1ike http://sg.rd. yahoo.com/ sg/mail/domainch oice/mail/ signature/ *http://mail. promotions. yahoo.com/ newdomains/ sg/
[Repeater-Builder] Noise Level on a Duplexer
Hello Everybody, Good day. We have developed a Duplexer to combine to two signals form two systems for in-building application. The Dupluxer (or combiner) has specifications of 1.7dB insertion loss and 60dB isolation. When we set up the system and power on the two systems, the combiner works fine. However, we notice that the noise level (up link) on the two systems will slowly increase, and until 3~4 days later, the noise level has increased to -80~-60dBm level. We then power down the systems for 3 hours, and power them up again. The systems work fine again. Anybody could help? Best Regards, Kent New Email names for you! Get the Email name you#39;ve always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
Re: [Repeater-Builder] Noise Level on a Duplexer
Dear Joe, One system is on 380~400Mhz, and the other one is on 470~490Mhz. Best Regards, Kent --- On Tue, 9/3/10, Joe k1ike_m...@snet.net wrote: From: Joe k1ike_m...@snet.net Subject: Re: [Repeater-Builder] Noise Level on a Duplexer To: Repeater-Builder@yahoogroups.com Date: Tuesday, 9 March, 2010, 7:29 AM What frequency are you on? Joe Kent Chong wrote: Hello Everybody, Good day. We have developed a Duplexer to combine to two signals form two systems for in-building application. The Dupluxer (or combiner) has specifications of 1.7dB insertion loss and 60dB isolation. When we set up the system and power on the two systems, the combiner works fine. However, we notice that the noise level (up link) on the two systems will slowly increase, and until 3~4 days later, the noise level has increased to -80~-60dBm level. We then power down the systems for 3 hours, and power them up again. The systems work fine again. Anybody could help? Best Regards, Kent - - - - - - New Email names for you! http://sg.rd. yahoo.com/ sg/mail/domainch oice/mail/ signature/ *http://mail. promotions. yahoo.com/ newdomains/ sg/ Get the Email name you've always wanted on the new @ymail and @rocketmail. Hurry before someone else does! New Email addresses available on Yahoo! Get the Email name you#39;ve always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
Re: [Repeater-Builder] Noise Level on a Duplexer
Dear Nate, They are TETRA TETRAPOL systems. It seems like our Duplexer that is causing the problem, as the TETRA system bypasses the Combiner, the noise is removed. At first, we were thinking it is the heat problem, but the system is installed in an air-condition room at 25 deg C, and the Duplexer is not heated up. Best Regards, Kent --- On Tue, 9/3/10, Nate Duehr n...@natetech.com wrote: From: Nate Duehr n...@natetech.com Subject: Re: [Repeater-Builder] Noise Level on a Duplexer To: Repeater-Builder@yahoogroups.com Date: Tuesday, 9 March, 2010, 6:08 AM What specific radios, and would 3 hours be enough for the radios themselves or any other components they might be heating to return to room-temperature (whatever that is where they're installed)? Nate WY0X On 3/8/2010 10:03 AM, Kent Chong wrote: Hello Everybody, Good day. We have developed a Duplexer to combine to two signals form two systems for in-building application. The Dupluxer (or combiner) has specifications of 1.7dB insertion loss and 60dB isolation. When we set up the system and power on the two systems, the combiner works fine. However, we notice that the noise level (up link) on the two systems will slowly increase, and until 3~4 days later, the noise level has increased to -80~-60dBm level. We then power down the systems for 3 hours, and power them up again. The systems work fine again. Anybody could help? Best Regards, Kent New Email addresses available on Yahoo! Get the Email name you#39;ve always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
[Repeater-Builder] Multi Tone IMP Level with IP3 Figure
Hi, Does anybody come across any paper on calculating the power level of the intermodulation products for multi-tone signal going through a Power Amplifier having an IP3 figure? Best Regards, Chong Kwan Meng New Email names for you! Get the Email name you#39;ve always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
RE: [Repeater-Builder] MPT Trunked Radio in CB Band
Dear Mike, Thanks for your information. We are not sure if TDMA (TETRA) comes with CB band. Does it? Best Regards, Chong Kwan Meng --- On Wed, 18/2/09, Mike Mullarkey k7...@comcast.net wrote: From: Mike Mullarkey k7...@comcast.net Subject: RE: [Repeater-Builder] MPT Trunked Radio in CB Band To: Repeater-Builder@yahoogroups.com Date: Wednesday, 18 February, 2009, 1:31 PM Kent, Kenwood has the TK-8180 Mobile and the TK-3180 Portable will work in your band your requiring. Just curious, why go to MPT1327 and not TDMA digital. Mike From: Repeater-Builder@ yahoogroups. com [mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of Kent Chong Sent: Tuesday, February 17, 2009 8:40 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] MPT Trunked Radio in CB Band Dear John, Yes, we are located in Singapore . We are thinking of putting up a MPT system in CB band. Do you have any products/suppliers that you could recommend to us? Best Regards, Kent Chong --- On Wed, 18/2/09, John Gleichweit smokeyb...@sbcgloba l.net wrote: From: John Gleichweit smokeyb...@sbcgloba l.net Subject: Re: [Repeater-Builder] MPT Trunked Radio in CB Band To: Repeater-Builder@ yahoogroups. com Date: Wednesday, 18 February, 2009, 5:02 AM By Kent 's email domain, I'd gather that he's in Singapore . I'm not sure what the unlicensed/low restriction band may be over there, but it's probably in the 450-470 range. -- John Smokey Behr Gleichweit FF1/EMT, CCNA, MCSE IPN-CAL023 N6FOG UP Fresno Sub MP183.5 ECV1852 List Owner x10, Moderator x9 CA-OES 51-507 http://smokeybehr. blogspot. com http://www.myspace. com/smokeybehr - Original Message From: Mike Morris WA6ILQ wa6...@gmail. com To: Repeater-Builder@ yahoogroups. com Sent: Tuesday, February 17, 2009 10:32:15 AM Subject: Re: [Repeater-Builder] MPT Trunked Radio in CB Band At 09:53 PM 02/16/09, you wrote: Hi Everybody, Good day. Does anybody know about the a portable/mobile and basestation MPT trunked radio operating in citizen band (CB)? Best Regards, Kent Chong What country ?? CB in the USA is 27MHz using AM and MPT is very rare in the US . CB in NZ is somewhere in the 470 region using FM and MPT is a bit more common in AU and NZ. Don't forget - the first two Ws in WWW is World Wide, and this group has over 4300 members in over a dozen countries. Mike WA6ILQ - - -- Yahoo! Groups Links Search. browse and book your hotels and flights through Yahoo! Travel Get your new Email address! Grab the Email name you#39;ve always wanted before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
Re: [Repeater-Builder] Re: MPT Trunked Radio in CB Band
Dear Walter, We have checked the regulation here, and the CB for UHF is 477 ~ 478Mhz (1 Mhz bandwidth). It is not sufficient for trunking operation (Tx/Rx separation of 10Mhz). It seems that trunked radio could not operate in CB band. Best Regards, Kent Chong --- On Thu, 19/2/09, ka1jfy walter.howard...@gmail.com wrote: From: ka1jfy walter.howard...@gmail.com Subject: [Repeater-Builder] Re: MPT Trunked Radio in CB Band To: Repeater-Builder@yahoogroups.com Date: Thursday, 19 February, 2009, 2:18 AM Chong; Please tell the rest of the world what YOU'RE CB band is. Tetra equipment usually covers a specific band of frequencies in the 380-430 MHz range, although WikiPedia says there are specifications at 800, 900, and 450-470 MHz [http://en.wikipedia .org/wiki/ TETRA] WalterH --- In Repeater-Builder@ yahoogroups. com, Kent Chong kentchongkm@ ... wrote: Dear Mike, Thanks for your information. We are not sure if TDMA (TETRA) comes with CB band. Does it? Best Regards, Chong Kwan Meng New Email names for you! Get the Email name you#39;ve always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
Re: [Repeater-Builder] MPT Trunked Radio in CB Band
Dear John, Yes, we are located in Singapore. We are thinking of putting up a MPT system in CB band. Do you have any products/suppliers that you could recommend to us? Best Regards, Kent Chong --- On Wed, 18/2/09, John Gleichweit smokeyb...@sbcglobal.net wrote: From: John Gleichweit smokeyb...@sbcglobal.net Subject: Re: [Repeater-Builder] MPT Trunked Radio in CB Band To: Repeater-Builder@yahoogroups.com Date: Wednesday, 18 February, 2009, 5:02 AM By Kent's email domain, I'd gather that he's in Singapore. I'm not sure what the unlicensed/low restriction band may be over there, but it's probably in the 450-470 range. -- John Smokey Behr Gleichweit FF1/EMT, CCNA, MCSE IPN-CAL023 N6FOG UP Fresno Sub MP183.5 ECV1852 List Owner x10, Moderator x9 CA-OES 51-507 http://smokeybehr. blogspot. com http://www.myspace. com/smokeybehr - Original Message From: Mike Morris WA6ILQ wa6...@gmail. com To: Repeater-Builder@ yahoogroups. com Sent: Tuesday, February 17, 2009 10:32:15 AM Subject: Re: [Repeater-Builder] MPT Trunked Radio in CB Band At 09:53 PM 02/16/09, you wrote: Hi Everybody, Good day. Does anybody know about the a portable/mobile and basestation MPT trunked radio operating in citizen band (CB)? Best Regards, Kent Chong What country ?? CB in the USA is 27MHz using AM and MPT is very rare in the US. CB in NZ is somewhere in the 470 region using FM and MPT is a bit more common in AU and NZ. Don't forget - the first two Ws in WWW is World Wide, and this group has over 4300 members in over a dozen countries. Mike WA6ILQ - - -- Yahoo! Groups Links Yahoo! Toolbar is now powered with Search Assist.Download it now! http://sg.toolbar.yahoo.com/
[Repeater-Builder] MPT Trunked Radio in CB Band
Hi Everybody, Good day. Does anybody know about the a portable/mobile and basestation MPT trunked radio operating in citizen band (CB)? Best Regards, Kent Chong Yahoo! Toolbar is now powered with Search Assist.Download it now! http://sg.toolbar.yahoo.com/
[Repeater-Builder] Comparison Between P25 Conventional Radio Data Transmission
Dear Sir, We are interested in upgrading our current analog radio into P25 system. Does anyone have the comparison between the P25 and conventional radio? We will be using the radio for voice and data transmission. Best Regards, Kent Chong New Email addresses available on Yahoo! Get the Email name you#39;ve always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/
[Repeater-Builder] HF ALE LQA Values
Good day. Does anybody know about the relationship between the HF ALE LQA value and received signal strength? We could extract the LQA values from the HF radio, but we do not know how to convert it back to the received signal strength. Appreciate your advices. Best Regards, Chong Kwan Meng __ Tired of visiting multiple sites for showtimes? Yahoo! Movies is all you need http://sg.movies.yahoo.com
Re: [Repeater-Builder] Re: Amplifier
Dear Gary, Thanks for the calculations. As we are using a +22dBm amplifier, the output per channel shall work out as -2dBm (+22dBm - 24dB, and +22dBm is 1dB compression point). However, the measurement shows that it is -24dBm per channel. Anything we have missed out? Best Regards, Chong Kwan Meng - Original Message From: Gary Schafer [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, 11 January 2008 2:28:09 Subject: RE: [Repeater-Builder] Re: Amplifier If you want each signal, of the 16 signals, to be 0 dBm (1 mW) output capable then the amplifier has to be capable of 16 squared times 1 mW or 256 milliwatts. This is the peak envelope power that can be present at any one time in the amplifier with 16 signals present. So the amplifier would need to be able to handle a little over +24dBm with a single signal (256mW) With only 2 signals of 1 mW each the peak envelope power would be 2 squared (2x2) or 4 mW that the amplifier would need to handle or +6dBm. It is the number of signals squared times the power of one of the signals assuming that all the signal levels are the same. This is exactly the same thing as if it was an SSB linear amplifier and you were testing it with multiple tones. 73 Gary K4FMX From: Repeater-Builder@ yahoogroups. com [mailto:Repeater- [EMAIL PROTECTED] ups.com] On Behalf Of Kent Chong Sent: Thursday, January 10, 2008 8:46 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] Re: Amplifier Dear NJ902, Thanks for your advise. In this case, what is the amplifier power rating for us to obtain 0dBm output power for 16 channels? Best Regards, Chong Kwan Meng - Original Message From: nj902 [EMAIL PROTECTED] net To: Repeater-Builder@ yahoogroups. com Sent: Friday, 11 January 2008 12:23:19 Subject: [Repeater-Builder] Re: Amplifier It appears that your amplifier is doing what you should expect. An amplifier's power handling capability, compression point, etc. are rated based on amplification of a single sinusoid. When multiple signals are present at the amplifier input, the total output power of the amplifier does not change, hence the power available per channel decreases as the number of input signals increases. Also, since multiple independent signals will combine randomly, crest factor issues further decrease the available power per channel in order to keep the amplifier output below clipping. This is a common issue in the design of signal enhancement products such as BDA's used to provide coverage extension for trunking and cellular radio systems. - - - - - - --- In Repeater-Builder@ yahoogroups. com, Kent Chong kentchongkm@ ... wrote: All three amplifiers are connected in series. I shall correct my statement: in the lab, we get 0dBm output on the last stage of amplifier. However, when we are at the site, it max at -24dBm (it is - ve, sorry). There is no difference in the configuration but number of channel. Tired of visiting multiple sites for showtimes? Yahoo! Movies is all you need __ Search, browse and book your hotels and flights through Yahoo! Travel. http://sg.travel.yahoo.com
Re: [Repeater-Builder] Amplifier
All three amplifiers are connected in series. I shall correct my statement: in the lab, we get 0dBm output on the last stage of amplifier. However, when we are at the site, it max at -24dBm (it is -ve, sorry). There is no difference in the configuration but number of channel. Best Regards, Chong Kwan Meng - Original Message From: Yahoo [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, 10 January 2008 2:45:53 Subject: RE: [Repeater-Builder] Amplifier We would need more information for a proper response. Are you terminating the unused ports in the LAB? If the amplifier is 22dBm then 24dBm would be normal. Jeff From: Repeater-Builder@ yahoogroups. com [mailto:Repeater- [EMAIL PROTECTED] ups.com] On Behalf Of Kent Chong Sent: Wednesday, January 09, 2008 9:47 PM To: Repeater-Builder@ yahoogroups. com Subject: [Repeater-Builder] Amplifier Hello, Good day. A question on the amplifer specifications. We are using a few amplifiers for our RX signal. The amplifier has 22dBm - 1dB compression point. We the have 5~6 channels input into the amplifers, we could obtain about 0dBm output power in the LAB. However, at the site, when we have total 16 channels input into the amplifiers, the output power per channel max. at 24dBm. Anybody could give some advices. Anybody could advise how could we get 0dBm output at the site? Best Regards, Chong Kwan Meng Real people. Real questions. Real answers. Share what you know. __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
Re: [Repeater-Builder] Re: Amplifier
Dear NJ902, Thanks for your advise. In this case, what is the amplifier power rating for us to obtain 0dBm output power for 16 channels? Best Regards, Chong Kwan Meng - Original Message From: nj902 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, 11 January 2008 12:23:19 Subject: [Repeater-Builder] Re: Amplifier It appears that your amplifier is doing what you should expect. An amplifier's power handling capability, compression point, etc. are rated based on amplification of a single sinusoid. When multiple signals are present at the amplifier input, the total output power of the amplifier does not change, hence the power available per channel decreases as the number of input signals increases. Also, since multiple independent signals will combine randomly, crest factor issues further decrease the available power per channel in order to keep the amplifier output below clipping. This is a common issue in the design of signal enhancement products such as BDA's used to provide coverage extension for trunking and cellular radio systems. - - - - - - --- In Repeater-Builder@ yahoogroups. com, Kent Chong kentchongkm@ ... wrote: All three amplifiers are connected in series. I shall correct my statement: in the lab, we get 0dBm output on the last stage of amplifier. However, when we are at the site, it max at -24dBm (it is - ve, sorry). There is no difference in the configuration but number of channel. __ Tired of visiting multiple sites for showtimes? Yahoo! Movies is all you need http://sg.movies.yahoo.com
[Repeater-Builder] Amplifier
Hello, Good day. A question on the amplifer specifications. We are using a few amplifiers for our RX signal. The amplifier has 22dBm - 1dB compression point. We the have 5~6 channels input into the amplifers, we could obtain about 0dBm output power in the LAB. However, at the site, when we have total 16 channels input into the amplifiers, the output power per channel max. at 24dBm. Anybody could give some advices. Anybody could advise how could we get 0dBm output at the site? Best Regards, Chong Kwan Meng __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
[Repeater-Builder] TETRA Amplifier Selection
Hi Everybody, Could anyone advise how to specify amplifier for TETRA applications? Best Regards, Kent Chong __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
[Repeater-Builder] Bi-directional Amplifer
Good day everybody, For an off-air repeater, we normal use bi-direction amplifier (BDA). A BDA is constructed using two amplifiers for uplink and downlink, interconnected with two duplexers (or circulators) at the front end. In order to prevent the BDA from looping oscillation, the duplexer (circulators) must provide sufficient isolation. We have built such BDA; however, we face the oscillation problem. We are thinking of breaking the BDA into two parts: uplink and downlink. And we amplify uplink and downlink separately. In this way, we need four duplexers (or circulators). Would this method work? Anybody could advise? Best Regards, Kent Chong __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
Re: [Repeater-Builder] Radio Tone Control
Dear Gareth, We have 29 fixed sites with 6 VX-4200 radios preloaded with frequency. We have one control site with the PC to control the VX-4200, such as frequency changing, receive ANI, select call etc. The fixed sites and control site are far a part which could not be reach with RF signal. We are using VSAT to link the fixed sites and control site, IP based. What is the VX-4200 controller that you are using? We are developping the controlling software in the control site PC. Would like to know the control protocol for the controller. Best Regards, Kent Chong - Original Message From: Gareth Bennett [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, 11 January 2007 6:36:06 Subject: Re: [Repeater-Builder] Radio Tone Control Kent, It would be beneficial to know exactly what you wish to achieve, and to know more about your project/requirement s so that I can be of more assistance. The VX-4200 is a very versatile radio and can preform numerous remote control functions. Cheers _ _ _ _ _ Gareth Bennett This e-mail is confidential, if you received this message in error, or you are not the intended recipient, please return it to the sender and destroy any copies. Thank you. - Original Message - From: Kent Chong To: Repeater-Builder@ yahoogroups. com Sent: Wednesday, January 10, 2007 11:45 PM Subject: Re: [Repeater-Builder] Radio Tone Control Dear Gareth, We are using VX-4200 series and ICOM IC-F521 or F621 radio. Would like to know more how you do it. We know the VX-4200 has a DB15. How do we control the radio via the audio line? Best Regards, Chong Kwan Meng - Original Message From: Gareth Bennett [EMAIL PROTECTED] nz To: Repeater-Builder@ yahoogroups. com Sent: Tuesday, 9 January 2007 6:14:39 PM Subject: Re: [Repeater-Builder] Radio Tone Control Vertex Standard VX-2200 and 4200 series radios can be channel changed via BCD addressible pins from the rear sub DB15. We utilise a UHF link radio (VX-2200 or 4200) to send 5 Tone commands that can be addressed via a configurable BCD output that can change the frequency and of course pass through the appropriate audio. Let me know if this is the down the track that you are interested in, and I can supply you more info. _ _ _ _ _ Gareth Bennett This e-mail is confidential, if you received this message in error, or you are not the intended recipient, please return it to the sender and destroy any copies. Thank you. - Original Message - From: Vincent Caruso To: Repeater-Builder@ yahoogroups. com Sent: Tuesday, January 09, 2007 6:47 PM Subject: Re: [Repeater-Builder] Radio Tone Control Some info can be found on the Midian site in pdf at the following link http://www.midians. com/pdf/tone_ signaling. pdf Telex has some info on their site as well, but most common commercial gear only interfaces to certain radios for multiple channel control otherwise you are limited to one two or four channel remotes. Vince Kent Chong wrote: Hello, Would like to control ICOM, and Vertex radio remotelly by using the tone, for example, change channel, PTT etc. Anybody know the remote control tone standard? Where could I find the informtion? Best Regards, Chong Kwan Meng Send instant messages to your online friends http://asia. messenger. yahoo.com Send instant messages to your online friends http://asia. messenger. yahoo.com __ Meet your soulmate! Yahoo! Asia presents Meetic - where millions of singles gather http://asia.yahoo.com/meetic
Re: [Repeater-Builder] Radio Tone Control
Dear Gareth, We are using VX-4200 series and ICOM IC-F521 or F621 radio. Would like to know more how you do it. We know the VX-4200 has a DB15. How do we control the radio via the audio line? Best Regards, Chong Kwan Meng - Original Message From: Gareth Bennett [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, 9 January 2007 6:14:39 PM Subject: Re: [Repeater-Builder] Radio Tone Control Vertex Standard VX-2200 and 4200 series radios can be channel changed via BCD addressible pins from the rear sub DB15. We utilise a UHF link radio (VX-2200 or 4200) to send 5 Tone commands that can be addressed via a configurable BCD output that can change the frequency and of course pass through the appropriate audio. Let me know if this is the down the track that you are interested in, and I can supply you more info. _ _ _ _ _ Gareth Bennett This e-mail is confidential, if you received this message in error, or you are not the intended recipient, please return it to the sender and destroy any copies. Thank you. - Original Message - From: Vincent Caruso To: Repeater-Builder@ yahoogroups. com Sent: Tuesday, January 09, 2007 6:47 PM Subject: Re: [Repeater-Builder] Radio Tone Control Some info can be found on the Midian site in pdf at the following link http://www.midians. com/pdf/tone_ signaling. pdf Telex has some info on their site as well, but most common commercial gear only interfaces to certain radios for multiple channel control otherwise you are limited to one two or four channel remotes. Vince Kent Chong wrote: Hello, Would like to control ICOM, and Vertex radio remotelly by using the tone, for example, change channel, PTT etc. Anybody know the remote control tone standard? Where could I find the informtion? Best Regards, Chong Kwan Meng Send instant messages to your online friends http://asia. messenger. yahoo.com Send instant messages to your online friends http://asia.messenger.yahoo.com
[Repeater-Builder] Radio Tone Control
Hello, Would like to control ICOM, and Vertex radio remotelly by using the tone, for example, change channel, PTT etc. Anybody know the remote control tone standard? Where could I find the informtion? Best Regards, Chong Kwan Meng Send instant messages to your online friends http://asia.messenger.yahoo.com
[Repeater-Builder] Isolator/Circulator
Hello, Building a combiner now. Frequency is between 400-520Mhz and power is 10W. Need to add isolator/circulator to improve the isolation. Anybody knows suppliers to provide this isolator/circulator? Best Regards, Kent Chong Send instant messages to your online friends http://asia.messenger.yahoo.com
[Repeater-Builder] Simplex Repeater
Good Day, We are using simplex radio (using single frequency for transmit and receive) and we would like to build a repeater. We would appreciate it if anybody could advise us how to do it. Best Regards, Chong Kwan Meng __ Yahoo! Movies - Search movie info and celeb profiles and photos. http://sg.movies.yahoo.com/
