Ka band, different freq front to rear?

Slewis

Learning to Drive
General User
Joined
Dec 30, 2019
Messages
6
Reaction score
10
Still getting my R3 dialed in. Passed a county rig today running Ka. The frequency shifted after he went by me. I wrote it down but don't have it on me. Do the front and rear radar guns run on different frequencies or is this some sort of natural frequency shift?
 

sdrawkcaB

Defender of Light
Security
Advanced User
Lifetime Premium Member
Joined
Mar 6, 2018
Messages
4,825
Reaction score
9,455
Location
Here
What you're observing is correct. The frequencies for the front and rear guns are almost never the same. Stalker Dual and Stalker Dual 2X systems almost always use 34.7xx in the front, and 34.6xx in the rear. It's nice because even with a single horn non-directional detector like the Uniden R3, you can guesstimate the orientation of the police officer as you pick up the signal.

For example, if I'm on the freeway and I begin getting an alert for 34.6xx, then I figure I am most likely approaching a cop who is facing the same direction as me. Note that you'll still need to take into the account the ramp up; how quickly and strongly the signal grows and fades, but with a little more road time you'll quickly become experienced in this and be able to tell the difference between a 34.7xx approaching you from behind vs. a 34.7xx signal coming at you from the opposite direction.

You're off to a good start, and are very observant! Keep it up!
 

Slewis

Learning to Drive
General User
Joined
Dec 30, 2019
Messages
6
Reaction score
10
Awesome that is what I was hoping to hear, for the reasons mentioned. Wish I had a photographic memory for all the freqs I've been observing. I've been keeping a notepad in the console to get an idea of what's being run around me.
 

sdrawkcaB

Defender of Light
Security
Advanced User
Lifetime Premium Member
Joined
Mar 6, 2018
Messages
4,825
Reaction score
9,455
Location
Here
Awesome that is what I was hoping to hear, for the reasons mentioned. Wish I had a photographic memory for all the freqs I've been observing. I've been keeping a notepad in the console to get an idea of what's being run around me.
I did the same thing to begin with; I'd remember the numbers, then write them down when I got to a stop light and had a few seconds. If you get a dashcam, you can have your dashcam placed near to your detector, and then the dashcam will capture the audio of the frequency readout (voice readout) of an Uniden R1,R3 or R7.
 

fireparamed

Learning to Fly
Beginner User
Joined
May 14, 2018
Messages
171
Reaction score
344
Location
Utah
FYI, This is a great rule of thumb and I was excited when I figured out the same thing with my R3, HOWEVER, a couple of times in the last few months AND TODAY, I came across as stationary Officer using only rear radar and it was shooting 34.7. I’ve also been hit by 34.6 from front radar.

So do not lose situational awareness and think that it is always 34.7 front and 34.6 rear. Learn to trust the ramp up and other cues.
 

sdrawkcaB

Defender of Light
Security
Advanced User
Lifetime Premium Member
Joined
Mar 6, 2018
Messages
4,825
Reaction score
9,455
Location
Here
@fireparamed is right - There are occasional outliers to the norm. Learning to become familiar with your detectors signal strength ramp up is a critical skill.

I’ve encountered one Utah Highway Patrol who had 34.7xx in the rear, and 34.3xx in the front. Yes, you read that correctly: 34.3xx in the front.
 

Kennyc56

Ford Lover-I/O hater!
Advanced User
Lifetime Premium Member
Joined
Feb 22, 2018
Messages
3,163
Reaction score
8,273
Location
I/O Hell, Aka Eastern N.C.
Since NCHP has started switching over to Stalkers, one of their favorite new tricks is hitting you with I/O with their front antenna, then after you pass them by they'll switch to their rear unit! They never have the same frequency but so far in NC they are keeping their Stalkers spot on. The front units are around 34.7-34.730 and the rears are just a little higher starting around 34.735-34.745 or so. After you get hit around 10,000 times or so LOL, you won't have to write it down anymore! One of my favorite things about my R1's is their bogey alert tones! I love it when they pass me by and it lets me know they switched up on me and shows me the new frequency! Dammit @sdrawkcaB ,34.3? Really? That's no damn fair! :argh:
 
Last edited:

Discord Server

Latest threads

Latest posts

Forum statistics

Threads
81,097
Messages
1,232,465
Members
20,549
Latest member
bennie gibbins
Top