|
|||||||||
|
Thread Tools | Search this Thread |
March 30th, 2003, 05:02 AM | #1 |
Regular Crew
Join Date: Jan 2003
Location: Clearwater, Florida
Posts: 60
|
Would anyone be interested in this?
I've heard and read a lot about RF affecting the steadyshot feature on the PD-150.
Would anyone be interested in seeing the results posted if I did a somewhat scientific test as to the minimum level of RF it takes to start causing a problem? Among all of the other gadgets I own, I have a Motorola R2001A commnunications service monitor. This device has a RF signal generator, spectrum analyzer, oscilliscope, CTCSS tone generator, as well as a host of other features. I'm still knocking around in my head a testing methodology and procedure, but it would be something like this: The procedure would be to set up the PD-150 to simulate real-world conditions as much as possible. Next, I would set up an antenna on a portable test-stand. The antenna would be tunable so I could test at different frequencies, as well as variable distances from the camera. Coax would be run from the antenna to the generator output on the signal generator. I would then start recording a tape in the PD-150 while it was pointing at a test target. While recording, I would then turn on the signal generator and start keying it at different power levels--lowest power to the highest level that causes an effect and record the results. The resulting spreadsheet would look somthing like this: Antenna distance - 3ft / frequency 154.000 Mhz / power level -30dbm - no effect Antenna distance - 3ft / frequency 154.000 Mhz / power level -20dbm - no effect Antenna distance - 3ft / frequency 154.000 Mhz / power level -10dbm - Interference noted This would be repeated at varying antenna distances / power and frequencies. I have a couple of friends with PD-150s, so we could average the results and create a baseline graph as to the maximum power of any kind of handie-talkie or headset communicator you could use without worrying about interference. Sounds like a good weekend project in between gigs for me - or this simply could be the incoherent ramblings of someone who just finished a marathon editing session at 6:00 AM. *grin* Opinions? Ideas on methodology? Let me know! cheers, -Phil
__________________
Phil Reams Timeless Studio Productions Clearwater, Florida FCC Licensed Electronics Technician (GROL) Amateur Radio - KC4UVU Life Member of the PSHA - Pinnacle Studio Haters of America |
March 30th, 2003, 12:14 PM | #2 |
Wrangler
Join Date: May 2002
Location: Vallejo, California
Posts: 4,049
|
Certainly it would be of interest.
I wouldn't extend the sessions too long because I think the action can get fairly violent inside the camera and might, over the long term, cause some damage. Perhaps you would start at a distance or low power level and bring up the power/lower the distance until you perceive a problem, then stop. I'd like to send the results to the WEVA camera committee so they can make Sony pay attention to the problem.
__________________
Mike Rehmus Hey, I can see the carrot at the end of the tunnel! |
| ||||||
|
Thread Tools | Search this Thread |
|