Fw: [LakelandARC] Re: test equipment for rf analysis

Sat May 21 20:36:14 PDT 2011

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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