chris_bollard Posted November 29, 2011 Report Share Posted November 29, 2011 This is a question to all the RF gurus on the forum. Why is it when I enter Lectrosonics Pre-coordinated 16 frequencies for a block (in my test case bk28) does my IAS software find errors? On the same track, how come Lectro promotes 16 channels within a block and when I get IAS to generate a list of frequencies does it only ever find a maximum of 15? Quote Link to comment Share on other sites More sharing options...
taylormadeaudio Posted November 29, 2011 Report Share Posted November 29, 2011 Chris, Can you elaborate as to the specific errors the IAS software is finding? ~tt Quote Link to comment Share on other sites More sharing options...
chris_bollard Posted November 30, 2011 Author Report Share Posted November 30, 2011 Ok. Bk28 - testing (hex numbers) 0/5, 0/B, 1/4 Good to there When I test next in precoordinated list (1/A) I get IMD Hitlist "Triple Beat from 718.800 (standard) & 717.900 (standard) & 717.400 Test on 717.300 (standard),,,,,,,," Not sure how large an issue this is? Quote Link to comment Share on other sites More sharing options...
RadoStefanov Posted November 30, 2011 Report Share Posted November 30, 2011 Ok. Bk28 - testing (hex numbers) 0/5, 0/B, 1/4 Might be a local interference... Good to there When I test next in precoordinated list (1/A) I get IMD Hitlist "Triple Beat from 718.800 (standard) & 717.900 (standard) & 717.400 Test on 717.300 (standard),,,,,,,," Not sure how large an issue this is? Quote Link to comment Share on other sites More sharing options...
John Steigerwald Posted November 30, 2011 Report Share Posted November 30, 2011 I'd just skip the Lectro list and let IAS do all your coordination. Not to diss the Lectro chart, but it's just gonna be your easiest route. Quote Link to comment Share on other sites More sharing options...
chris_bollard Posted November 30, 2011 Author Report Share Posted November 30, 2011 Unfortunately I need 16 Tx in the one block at IAS will only give me 15 max Quote Link to comment Share on other sites More sharing options...
Peter Mega Posted November 30, 2011 Report Share Posted November 30, 2011 Chris, Group C and D in block 28 seem to work better than A and B in Australia. I've just been around Australia twice and Auckland twice in the last 4 months with no problems apart from Nerang in the Gold Coast. Admittedly I was using the 411's out of a bag set up which increases range incredibly but group C and D should work for you without intermod. Give me a call if you wanna chat some more about it but I'm finding C and D to be fine and currently using them with block 26 and 24 with 8 ifb also. Total of 28 radio mics and 8 ifb without problems. Good luck Peter Mega Quote Link to comment Share on other sites More sharing options...
RichardMeredith Posted November 30, 2011 Report Share Posted November 30, 2011 What you up to Mega that needs 28 channels of RF? Are IAC'ing - stroke my JoeCo and say "Hello" to it if you are. Lectro themselves have recently clarified this exact point to me in the last month. The 16 channels outlined for each freq block within the Lectro manual is not, it appears, a guaranteed 16 channel intermod free plan - merely an advisory guide to 16 frequencies that have the least likely hood of interacting with one another (but not necessarily running them all at the same time). I agree the IAS spits out 15 max for the same span. Therefore Lectrosonics are NOT claiming that the system per se is capable of running 16 simultaneous transmit frequencies. If you're using SR receivers - forget it - I've been trying unsuccessfully to get anyway near 16. Quote Link to comment Share on other sites More sharing options...
chris_bollard Posted November 30, 2011 Author Report Share Posted November 30, 2011 Thx Pete & Richard Great to see someone else getting same response as me On top of 16 BK28 (411 receivers in bag unfortunately) got three in 26 and IFBs in 21 and 27. Four camera links as well as Comms and video links (5) in 5.8Ghz Only had to retune up on Barrier Reef, moved from groups C & D to A & B. Next trip is remote location so I don't forsee any major RF issues. The talent are on the large size so when they are grouped together (huddle) is when I'm struggling and was wondering if it is IM. Quote Link to comment Share on other sites More sharing options...
studiomprd Posted December 1, 2011 Report Share Posted December 1, 2011 " I need 16 Tx in the one block at IAS will only give me 15 max " IAS software is being more fussy (theoretical) than practical: It is warning you that if you group all the TX's together in one small sack, and put all the RX's together side by side and vertically stacked up, there might be some issue with a 7th order harmonic, or whatever... 25 MHz is a lot of spectrum! OTOH, other interference issues (besides TV broadcasters, are likely to play havoc, so in the end, you will have some trial and error testing to deal with... and of course you could get a bit of help by calling... Quote Link to comment Share on other sites More sharing options...
karlw Posted December 5, 2011 Report Share Posted December 5, 2011 Unfortunately I need 16 Tx in the one block at IAS will only give me 15 max I've used IAS quite a bit - perhaps my settings will be helpful. For one thing, I find IAS in stock form to be too conservative. Go to the "Tools" menu, then "Options". Un-check "3 TX 3rds" and "5ths" in the Test Enable area. I have never had any problem with triple beats or 5th order intermods, using high-quality gear. As John Steigerwald pointed out - ignore the pre-coordinated lists. We have stopped including them with products lately - there is just too much going on in the spectrum in most places to rely on those charts. Let us know if relaxing the testing criteria yields enough channels - it should. Quote Link to comment Share on other sites More sharing options...
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