Doug Siddons Posted May 12, 2008 Share Posted May 12, 2008 Hi Guys Had a real hair puller on saturday night and haven't got much left to pull out, in my radio rack have two sennheieser recievers ew100's and one JTS reciever and 2 akg wms s40 recievers, all are uhf and all except the akg are tuneable. I was using Senns radio mics tuned into the senn recievers and wanted to tune a senn body pack into the JTS reciever which was having none of it. The JTS radio mic could be tuned into the senn recievers and the akg reciever, the senn body pack could be tuned into the senns and the akg recievers. The senn body pack could't be tuned into the JTS what have I done wrong? By the way, the mics sound best tuned into the sennheiser recievers then the akg with the jts being my least favourite Link to comment Share on other sites More sharing options...
Light Console Posted May 12, 2008 Share Posted May 12, 2008 I don't know for sure, but it might have something to do with the Pilot feature on the Senn TX. The JTS RX will not have the Pilot function. My JTS out performs my Sen TX on range, but audio quality... Link to comment Share on other sites More sharing options...
johndenim Posted May 12, 2008 Share Posted May 12, 2008 Strange one this, unless it has somthing to do with the 'pilot' feature as mentioned. What happens when you tune the senn body pack to the the jts reciever?Nothing? Maybe tune one of the senn mics to the jts and use the body pack with one of the senn recievers?Try turning off the pilot off on the body pack, and retry tuning to the jts reciever. ( if its on of course!)Maybe contact sennheiser, I have dealt with them before and customer services are quite helpful. John Denim. Link to comment Share on other sites More sharing options...
Rob_Beech Posted May 12, 2008 Share Posted May 12, 2008 This is of course, assuming that they are G2 units, as the older ones didn't have the pilot tone at all. Link to comment Share on other sites More sharing options...
Shez Posted May 12, 2008 Share Posted May 12, 2008 One thing to bear in mind when trying to mix & match kit is that different manufacturers use different companding schemes. This is likely to mess up your dynamics a bit... Link to comment Share on other sites More sharing options...
Doug Siddons Posted May 12, 2008 Author Share Posted May 12, 2008 They are not G2 Units, all I can assume is the jts has some sort of block to other makes on it, the reciever unit shows that its locked onto the rf signal but no af signal hence no sound .. its not the end of the world just annoying Link to comment Share on other sites More sharing options...
johndenim Posted May 12, 2008 Share Posted May 12, 2008 So it locks onto the freq of the senn but no audio. Hmm, maybe you are right about it locking out other manufacturers equipment, but how does it know that if its on the same freq?I assume that you have checked every other possibility, signal, that kind of thing? Or is it the case that there is no rf signal on the reciever? John Denim. Link to comment Share on other sites More sharing options...
Bobbsy Posted May 13, 2008 Share Posted May 13, 2008 It rarely works (and even more rarely works well) to mix and match RF body packs and receivers from different brands. The pilot tone issue has already been mentioned (and is likely not applicable here) but there are all sorts of parameters which can vary in RF. These include the companding scheme, pre-emphasis settings, FM deviation settings and centre frequencies/tuning increments. Bob Link to comment Share on other sites More sharing options...
Shez Posted May 13, 2008 Share Posted May 13, 2008 According to a quick google, JTS kit uses pilot tones too. (NB. these will be different & incompatible with Sennheiser tones) When the JTS receiver picks up RF and doesn't hear a JTS pilot tone, it mutes the audio output. Not technically a block on using other manufactuer's kit but it is a side effect of it.Plus everything Bobbsy said. Link to comment Share on other sites More sharing options...
Doug Siddons Posted May 13, 2008 Author Share Posted May 13, 2008 Thanks shez that will be it then, but the JTS mic works with the Sennheiser reciever ....... Thanks to all on this and Dan thanks for the pm. And as an after thought if anyone has a Ew135 mic only they want out of please let me know Doug Link to comment Share on other sites More sharing options...
Bobbsy Posted May 13, 2008 Share Posted May 13, 2008 Thanks shez that will be it then, but the JTS mic works with the Sennheiser reciever ....... That makes sense....if it's the OLD Evolution 100 series receivers that don't use pilot tone then they will just ignore the presence of the signal coming from the JTS transmitter (though, depending on the pilot frequency there could be low level interference). However, the other way round, a receiver expecting pilot tone will mute when it's not present. Bob Link to comment Share on other sites More sharing options...
Lamplighter Posted May 13, 2008 Share Posted May 13, 2008 The current Sennheiser units (g2 series) use the same pilot tone as JTS (measured as 32.767 kHz) The major difference is the level of the pilot tone. Sennheiser use 2.5 kHz deviation, JTS use 5 kHz deviation. This may result in the JTS receiver not opening the audio path. As previously mentioned the older Sennheisers do not generate a pilot tone and thefore a JTS receiver will not open the audio path. The companding issue mentioned by Shez and Bobbsy is also very real.Brian Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.