Fw: [LakelandARC] Re: test equipment for rf analysis
Phil Dentler
k4bhe at tampabay.rr.com
Sun May 22 13:53:17 PDT 2011
Mike just off county line road just south of I-4....Phil
----- Original Message -----
From: Mike Phillips
To: LakelandARC at yahoogroups.com
Sent: Sunday, May 22, 2011 10:45 AM
Subject: Re: Fw: [LakelandARC] Re: test equipment for rf analysis
I'm in N. lakeland, you? I'm a working stiff, so I'm usually only available in the evenings after 6 or on weekends.
Mike
--- On Sat, 5/21/11, Phil Dentler <k4bhe at tampabay.rr.com> wrote:
From: Phil Dentler <k4bhe at tampabay.rr.com>
Subject: Re: Fw: [LakelandARC] Re: test equipment for rf analysis
To: LakelandARC at yahoogroups.com
Date: Saturday, May 21, 2011, 11:53 PM
Mike...just getting home from a show I ran....you can bring the stuff out and we can put it on the bench.....Let me know your sched. Phil
----- Original Message -----
From: Mike Phillips
To: LakelandARC at yahoogroups.com
Sent: Saturday, May 21, 2011 11:36 PM
Subject: Re: Fw: [LakelandARC] Re: test equipment for rf analysis
Phil
I've got two scanners, but they're both blocked from 512-806MHZ. I didn't pick anything up from 170-174MHZ from the mic, but didn't really expect to since it is marked UHF.
I've got a handheld transceiver, but it is only 144-148MHZ, so I cant test any transmission ranges to the receiver.
Thanks for your help so far, any else I could try?
Mike
--- On Sat, 5/21/11, Mike Phillips <mostsigbit at yahoo.com> wrote:
From: Mike Phillips <mostsigbit at yahoo.com>
Subject: Re: Fw: [LakelandARC] Re: test equipment for rf analysis
To: LakelandARC at yahoogroups.com
Date: Saturday, May 21, 2011, 11:58 AM
Phil
Sorry for the delayed response... I'm not sure what you or Anchor mean conflicting, I thought I posted in the original message these are 'incompatible'. I want to know _how_ they are incompatible- eg what did Anchor change, and can anything be done (by me) to make 'em work. I own both and therefore can mod both. I observe the mic appears to have a jtag interface. I suspect the single rx/tx channel combo where I can receive, it is simply hitting a harmonic.
Thanks for the info about the freqs, the receiver is s/n H30000506. The mic is either s/n 0217376374 or s/n C3003792.
I'll try to play with the mic with my scanner and see what I can see, I don't know why I didn't think of that...
Mike
KJ4UKY
--- On Thu, 5/19/11, Phil Dentler <k4bhe at tampabay.rr.com> wrote:
From: Phil Dentler <k4bhe at tampabay.rr.com>
Subject: Fw: [LakelandARC] Re: test equipment for rf analysis
To: LakelandARC at yahoogroups.com
Date: Thursday, May 19, 2011, 6:19 PM
----- Original Message -----
From: Phil Dentler
To: LakelandARC at yahoogroups.com
Sent: Thursday, May 19, 2011 2:08 PM
Subject: Re: [LakelandARC] Re: test equipment for rf analysis
Mike more info on the Anchor unit....you list conflicting models and wh numbers....I know a tech in Anchor Audio and called him......The eairlier series used Vhf 170MHZ freqs and the later units used 700 MHZ for a very short time then they switched to 682 to 698 MHZ freqs. Sense our HAM radios or a scanner can get to these freqs. you can scan them for the most part. Triple check the model and also the serial number is the key to nailing down what you have.....next step is yours....Phil K4BHE
----- Original Message -----
From: Mike
To: LakelandARC at yahoogroups.com
Sent: Wednesday, May 18, 2011 9:59 AM
Subject: [LakelandARC] Re: test equipment for rf analysis
Thanks for responding Phil, here's the info I have on the Anchor equipment;
The receiver is integrated into a loudspeaker MegaVox Pro model MEGA-6000U1. It is set to wireless channel 9.
The transmitter is a hand-held wireless microphone model WH-3000. With the mic set to channel 4, with the equipment in close physical range (~5-10 feet)I can get the rx link lights to illuminate on the receiver and it will demodulate audio as expected. It doesn't lock onto the signal too well and will lose the lock often depending on mic orientation.
I cannot find any meaningful documentation on the mfgrs site, but a call to their support revealed these are not intended to be compatible. I don't know if the incompatibility is with the channel 'codes', modulation technique, or carrier.
I don't have physical access to the drive-in equipment, but swear to myself every time I visit the drive-in that I will bring up the topic here, and finally I'm getting around to it. If your equipment is at all portable, I'd just like to give the signal a look-see to see if anything jumps out as being mis-aligned. I've simply never had a good experience trying to tune their signal from various locations on the property using a variety of FM receivers. I figure if I have problems, everyone else probably does too.
Mike Phillips
KJ4UKY
--- In LakelandARC at yahoogroups.com, "Phil Dentler" <k4bhe at ...> wrote:
>
> Mike...good morning.....I can help you with both.....I need to know the channel code on both pieces.....this will tell us everything we need to know about the pieces then we will know the next move....I have a optoelectronics near field receiver that is used on my bench. The lakeland drive in transmitter that you want to see is probably a Ramsy product. I install these and set them up also. What is the model number and I can tell you your next move on that also. Phil K4BHE
> ----- Original Message -----
> From: Mike
> To: LakelandARC at yahoogroups.com
> Sent: Wednesday, May 18, 2011 12:48 AM
> Subject: [LakelandARC] test equipment for rf analysis
>
>
>
> Greetings
>
> I've got a 16 channel UHF mic from Anchor anchoraudio.com - and a 16 channel uhf receiver from the same company that are incompatible according to the mfg. I suspect the carrier freq is shifted and that's why they're 'incompatible'. There is a single channel where they kinda work, but not too good.
> I'd like to look at the signals and try to figure out what's going on. All I've got is a 60mhz DSO. I'm looking for a spectrum analyzer or whatever you've got and some RF know-how. Anybody wanna try to help figure this out?
> A separate project; I'd really also like to look at the FM signal for the lakeland drive-in. I suspect simple over modulation, but would really like to look at the signal.
>
> Mike Phillips
> KJ4UKY
>
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