Digital Radio Transmission Quiz

Questions and Answers

What is the primary benefit of using authorized signals and codes in communication?

It allows for more elaborate explanations during conversations.

It decreases errors caused by misunderstanding the transmitted message. (correct)

It eliminates the need for any verbal communication.

It ensures every message is repeated for clarity.

Which signal should be used to indicate that a member is ending their shift?

10-42 (correct)

10-4

10-10

10-7

What does the Caution Indicator in the Missouri Criminal History Records System signify?

It guarantees that the subject has multiple convictions.

It alerts officers about potential dangerous individuals. (correct)

It provides a comprehensive criminal history of the individual.

It indicates the subject has been previously apprehended.

When should an officer use clear, concise language instead of codes?

When situations are not covered by authorized signals or codes. Signup and view all the answers

Which of the following signals indicates that there is a person present who should not hear the communication?

10-12 Signup and view all the answers

What is the purpose of the 10-23 signal in dispatch communication?

To report arrival at a scene and manage air communication. Signup and view all the answers

Which signal is associated with determining an individual as a potentially intoxicated driver?

10-55 Signup and view all the answers

What does the signal 10-8 indicate?

In-service. Signup and view all the answers

What is the purpose of Caution Indicator One?

Known to be physically violent Signup and view all the answers

How does the dispatcher communicate the Caution Indicator to the officer?

By verbally informing the officer Signup and view all the answers

What is recorded on the dispatcher’s radio console when an officer keys the radio?

The RID of the radio Signup and view all the answers

Which statement accurately reflects the interaction between the officer's checking and the indicator response?

The indicator response is independent of the individual being checked. Signup and view all the answers

What causes a decrease in radio transmission quality?

Distance between the mouth and microphone Signup and view all the answers

What does Caution Indicator Two indicate about a subject?

Known to be armed Signup and view all the answers

What is a key characteristic of I-call conversations?

They can be recorded if selected. Signup and view all the answers

What limitation does the dispatcher have regarding Caution Indicators?

They cannot access records to determine the originating agency. Signup and view all the answers

What action will the dispatcher take upon the broadcast of an 'Assist the Officer'?

Immediately hold the air Signup and view all the answers

What is the primary function of an RF repeater in radio communications?

To receive and re-transmit signals, enhancing communication range. Signup and view all the answers

Who is responsible for determining if the situation is under control after a 'Code Five' is dispatched?

The responding supervisor or officer Signup and view all the answers

What must a member in-service do to hold the air when encountering a situation requiring immediate attention?

Provide their radio number and location Signup and view all the answers

Which statement accurately describes P25 Conventional communications?

They do not pass through the radio system like analog conventional mode. Signup and view all the answers

The Radio Identification Number (RID) serves what primary purpose in radio communications?

To provide a unique identifier for each radio during transmissions. Signup and view all the answers

What constitutes a missed radio call for a member?

Not answering three times in a reasonable time Signup and view all the answers

In simplex mode of radio communication, what is a key characteristic of the transmission?

Radios transmit and receive on the same frequency directly. Signup and view all the answers

What is the first action a member should take upon realizing they have missed a radio call?

Contact their immediate supervisor Signup and view all the answers

What should the supervisor do upon learning of a missed radio call before the member responds?

Gather information from the communications unit supervisor Signup and view all the answers

What is a significant limitation of unencrypted P25 calls?

They are accessible to any radio or scanner within the range. Signup and view all the answers

Which term refers to a collection of channels or talkgroups in radio communication?

System or Zone Signup and view all the answers

Which form may a member be required to complete after missing a radio call?

Interdepartment Communication, Form 191 P.D. Signup and view all the answers

How does an I-call differ from typical talkgroup communications?

It allows communication without using a talkgroup. Signup and view all the answers

What must the responding supervisor inform the dispatcher after determining the situation is under control?

Whether to clear the air Signup and view all the answers

What feature does a receiving radio have when engaged in P25 communication?

It can display the Radio Identification Number (RID) of the transmitting radio. Signup and view all the answers

What must be prioritized by the Communications Unit before conducting records checks?

Priority 10 through 30 calls for service Signup and view all the answers

What guidance does the use of channels without a D fall under?

National Incident Management System Signup and view all the answers

Why should requests for records be made using names instead of social security numbers?

Names allow for broader searches with spelling variations Signup and view all the answers

What is one of the restrictions on the responses provided by the dispatcher regarding records checks?

No detailed information on warrants is permitted Signup and view all the answers

What must Department members adhere to when deployed to assist in other jurisdictions?

The communication protocols of the local jurisdiction Signup and view all the answers

What might happen during peak call times when requesting records checks?

Members may be advised to standby Signup and view all the answers

Which of the following is NOT a file that can be searched using a name inquiry?

FBI Signup and view all the answers

Where are repeaters currently located in relation to Kansas City?

Nowhere in the Kansas City area Signup and view all the answers

Study Notes

Radio Transmission Types

Individual, Private or I-Call: Direct communication between two radios without a talkgroup; can be intercepted by radio scanners.
E.P25 Conventional: A digital communication mode; does not use radio systems for transmissions and does not usually communicate with dispatch.
Radio Identification Number (RID): Unique number assigned to each radio; transmitted during Push to Talk (PTT) to identify the sender and can be displayed on receiving radios.

Communication Systems

Repeater Function: Enhances communication range by receiving and re-transmitting signals on different frequencies.
Simplex Mode: Allows radios to communicate directly on the same frequency without a repeater; suited for short-distance communication.
System or Zone: A grouping of talkgroups/channels to streamline communication and reduce misunderstandings.

Authorized Signals and Codes

10-4: Acknowledgment received.
10-7: Out-of-service status.
10-8: In-service status.
10-10: Available while previously engaged with other officers.
10-12: Caution, sensitive information may be overheard.
10-23: Arrival at scene; critical for dispatcher communication.
10-41 & 10-42: Indicate beginning and ending tour of duty, respectively.
10-55 to 10-96: Specialized codes for intoxicated drivers, contacting other law enforcement, and emotionally disturbed persons.

Criminal History Indicators

Caution Indicators: Alerts officers to potentially dangerous individuals; does not confirm a conviction.
Levels of Caution:
- Indicator One: Physically violent history.
- Indicator Two: Known to be armed.
- Indicator Three: History of assaulting police officers.

Standard Radio Procedure

Microphone Technique: Maintain a distance of 1-2 inches for clear transmission; clarity and volume are crucial.
Recording of Conversations: Radio conversations may be recorded, including I-calls.
Incident Responses: Proper procedures must be taken upon arrival at a scene; radio air may be held by dispatch as required.

Missed Radio Calls Protocol

A member is considered to have missed a call after three attempts by dispatcher.
Follow-up: Immediate supervisor must be notified and an explanation provided.
Documentation: If required, submit an Interdepartment Communication form related to the incident.

Records Checks

Priority Calls: Highest priority given to emergency calls before conducting records checks.
Request Process: Use party names instead of Social Security numbers for broader searches across multiple databases.
Dispatcher Responses: Limited to confirming the presence of warrants; detailed results are not provided over the air.

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Description

Test your knowledge on individual and private radio transmissions, especially focusing on I-calls and P25 Conventional mode. Explore how these modes differ and their implications for communication without using a talkgroup. This quiz will challenge your understanding of radio systems and their functionalities.