Try the Models 240 or 242. They are the older models that work quite well. I
use them both for many years with great success. Although they don't have
actual video you can record patterns for comparison. when you find one of these
it should be at a considerably lower price.
RFI Services
Michael Martin
240-508-3760
rfiservices.com
Get BlueMail for Android
On Jun 29, 2020, 7:01 PM, at 7:01 PM, kd6bzn@gmail.com wrote:
>Question:
>
>Since I’m trying to chase multiple noises all mixed together, the Radar
>Engineers Model 243 would be cool to have, but it cost ~ $6,500. I’m
>thinking of buying an SDRPlay or HackRF product instead, to display
>frequency tuned zero span analysis. I haven’t seen a video yet, but do
>either of these devices (with available software) perform zero-span
>sweeps?
>
>
>
>RFI Search Update:
>
>The SCE RTVI guys came out a second time today and located, I believe,
>the correct source of noise this time (a lightning arrester). This is
>the 3rd lightning arrester to start leaking (arcing to ground) in the
>past 10 years or so. They wrote it up, priority 2, should be fixed in
>90 days or less.
>
>
>
>At the bottom of this page: http://www.mulveyware.com/noise/ is a
>screenshot and video of the noise on a spectrum analyzer (time domain).
>
>The video and screenshot on the web page depicts at least three noise
>sources. The two highest noises are obvious to me (AC line arcing).
>
>
>
>The 3rd and lowest amplitude noise source is weird to me. I marked the
>screenshot (not the video) in green.
>
>
>
>I’ll have to call SCE later when I locate these other two sources.
>
>
>
>Dave
>
>
>
>From: kd6bzn@gmail.com <kd6bzn@gmail.com>
>Sent: Monday, June 15, 2020 3:56 PM
>To: rfi@contesting.com
>Subject: Southern California Edison (RTVI Dept)
>
>
>
>I had a good experience with Southern California Edison. SCE contracts
>the Radio TV Interference (RTVI department) duties to two guys
>(electrician contractors) Steve and Ben.
>
>
>
>The first hurdle is to call the main line, get through the menu and
>talk to a real person.
>
>
>
>The 2nd hurdle is to tell the receptionist that we have "Interference"
>probably from the SCE and we need an appointment with the "RTVI
>department". They will likely not know what you are talking about,
>they may create a ticket, but refer to the EMF department, or not
>create a ticket because they do not understand, please hold while I
>talk to my manager...
>
>
>
>Once I had acknowledgement that a ticket was being created and it was
>concerning the "RTVI" department, Steve called me about a week later
>and set up an appointment with me.
>
>
>
>Steve and Ben drove two hours to my location and connected their
>RadarEngineers.com Model 243 receiver (tuned O-scope or zero-span
>spectrum analyzer) to my antenna. I showed them the noise and they
>recorded it. They left the house, returned 2 hours later with a
>location. Unfortunately for me, it wasn't a power line, rather, noise
>from someone's house 600 feet away. I felt a little embarrassed that I
>didn't do due diligence and perform a DF hunt before they were called.
>But, they said this is our job... Next time, I'll do better.
>
>
>
>There are a group of ~4 pulses, and each group of 4 pulses repeat every
>8.25 ms. 1/0.00825 = 120 Hz.
>
>So, something is arching at the peak of the wave envelope (bottom and
>top).
>
>
>
>The PRF is 120 Hz (60Hz X 2), so it's likely a AC Line accessory on the
>property. I have to go knock on the door, pray for me.
>
>
>
>
>freq (MHz)
>
>Measured Signal (dBm) @ ~500 KHz BW
>
>spreading loss
>
>distance (feet)
>
>Antenna Gain
>
>Calculated dBm (EIRP)
>
>watts
>
>millivolts
>
>
>50
>
>-54
>
>-51.80
>
>608
>
>12.8
>
>-15.00
>
>3.16577E-05
>
>0.031657697
>
>
>
>
>
>Pictures:
>
>http://www.mulveyware.com/noise/index.html
>
>
>
>Dave
>
>
>
>
>
>
>
>_______________________________________________
>RFI mailing list
>RFI@contesting.com
>http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|