Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
LoadBase 3.0 Mobile w/G7 BC Test Results
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="BryanLitz" data-source="post: 382429" data-attributes="member: 7848"><p>jrs,</p><p></p><p>It's good to think of these things. I tested my system for delays with the following approach:</p><p>1) On my desk I placed the transmitter and receiver, as well as the 'muzzle' mic and ran both signals into an audio mixer.</p><p>2) I then generated a tone from my PC speakers of a known frequency.</p><p>3) By viewing the wave-form of the added signal (from both mics) I was able to determine the delay that's caused by the transmitter/receiver pair.</p><p></p><p>The delay was way less than 1 millisecond.</p><p></p><p>The only thing the above test doesn't account for is the time delay it takes for the signal to travel the distance from transmitter to receiver in the field. A few calculations with the speed of light will convince you this is negligible too. I know nothing about TCP/IP LAN protocols, so you would probably have to perform a similar test to see what the delays are using your equipment. My transmitters and receivers are simply modified walkie-talkies.</p><p></p><p>Another delay you'll have to account for (not in the electronics, but in the math) is the time it takes for the sound to travel from the bullet to the mic as it passes. This is a simple calculation with the speed of sound, but you have to make it part of the process. A bullet that passes 5 feet from a mic will add 4.5 ms to the instrumental tof which you have to subtract out. Same is true on the muzzle end, but if you afix the mic to the chrono, the distance is only a few inches.</p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 382429, member: 7848"] jrs, It's good to think of these things. I tested my system for delays with the following approach: 1) On my desk I placed the transmitter and receiver, as well as the 'muzzle' mic and ran both signals into an audio mixer. 2) I then generated a tone from my PC speakers of a known frequency. 3) By viewing the wave-form of the added signal (from both mics) I was able to determine the delay that's caused by the transmitter/receiver pair. The delay was way less than 1 millisecond. The only thing the above test doesn't account for is the time delay it takes for the signal to travel the distance from transmitter to receiver in the field. A few calculations with the speed of light will convince you this is negligible too. I know nothing about TCP/IP LAN protocols, so you would probably have to perform a similar test to see what the delays are using your equipment. My transmitters and receivers are simply modified walkie-talkies. Another delay you'll have to account for (not in the electronics, but in the math) is the time it takes for the sound to travel from the bullet to the mic as it passes. This is a simple calculation with the speed of sound, but you have to make it part of the process. A bullet that passes 5 feet from a mic will add 4.5 ms to the instrumental tof which you have to subtract out. Same is true on the muzzle end, but if you afix the mic to the chrono, the distance is only a few inches. -Bryan [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
LoadBase 3.0 Mobile w/G7 BC Test Results
Top