#POLICE RADAR TUNING FORK TEST HOW TO#
#POLICE RADAR TUNING FORK TEST MANUALS#

Measurement – Takes approximately 110 frequency shifts to calculate 1 mph.Prevalence – Increasingly used in law enforcement RADAR systems since 1990s.Frequency Range – 26.5-40 GHz (Police typically use 33 to 36 GHz).Range – Generally shorter range when compared to Ka band.Antenna Size – Historically larger than KA, but current K-band antennas use a planar array and can be much smaller and lighter than KA antennas.Measurement – Approximately 70 frequency shifts to calculate 1 mph.Prevalence – Common in law enforcement RADAR systems since 1970s.Frequency Range – 18-27 GHz (Police typically use 24 GHz).The frequency allocations can change from country or region, so check with your local regulations before purchasing. Both K and Ka bands refer to specific segments of the electromagnetic spectrum that have been allocated for use by different entities.

#POLICE RADAR TUNING FORK TEST HOW TO#

What Are K and Ka Bands Differences?īefore looking at how to choose between K and Ka band antennas, it’s helpful to understand what these bands represent. For the purposes of this post, we will focus on K and Ka bands that are in production today. The police RADAR frequencies have historically been allocated into four main bands. Speed measurement devices can operate on several frequency bands. A phenomenon known as the Doppler Principle enables the device to accurately measure the speed of motorists by measuring the change of frequency of the signal reflected by a target vehicle. When the radio waves from the police RADAR make contact with a vehicle, some of the signal is reflected back to the device. The word RADAR is actually an acronym, which stands for Radio Detection And Ranging. In this blog post, we’ll break down the differences between these two bands and offer guidance on how to make the right choice for your needs. One important decision you’ll face is choosing between K and Ka band antennas for your RADAR systems. When it comes to RADAR detection, officers must be equipped with the right tools to ensure safety on the road and effective enforcement of traffic laws.

#POLICE RADAR TUNING FORK TEST MANUALS#

Operating Manuals and Quick Start Guides.

Falcon HR Railroad Handheld Doppler RADAR.

Back Office Storage - Eyewitness Data Vault.

That’s insufficient under the law, and there’s reasonable doubt whether I was going 70 miles an hour in a 55 lane. You heard from Officer Jones, who admitted that he didn’t use the tuning forks, relying instead only on the switch. As this state’s Supreme Court held, radar must be calibrated after every stop.

For example, you can say, “And, finally, Your Honor, the radar is not trustworthy. However, you should always say at least a few sentences about the radar’s accuracy. You might have many different reasons for getting out of the speeding ticket.

Refer to the judge as “Your Honor.” Refer to the officer by his or her last name, e.g., “Officer Jones.”.

You want the judge to be able to hear you. You should try to use 15 sentences or less, although you can use more if you have a lot of good evidence on your side. Explain to the judge how this evidence creates reasonable doubt that you were speeding. You should pull together all of your evidence. At the end of the trial, you will have to make an argument to the judge. If not, then they can become inaccurate because of moisture or jostling.

Where did the officer store the tuning forks? They need to be kept in a box.

X Research source Both the Wisconsin and Minnesota Supreme Courts have held that using only the test switch is insufficient if it is the only method of calibration used.

However, many officers might think that they “calibrate” the unit by turning on a test switch. How did they calibrate the unit? The officer should have calibrated it using the tuning forks.In some states, the unit must be calibrated after the ticket is issued. However, your state may have different requirements. When did they calibrate the unit? Generally, the unit should be calibrated at least once every 30-60 days.You should ask the officer questions about whether he or she calibrated the unit: X Research source Radar units come with tuning forks, and this is how they are mostly tested. Ask if the officer calibrated the radar unit.

Police radar tuning fork test