Term
| •WHAT ARE THE TWO COMPONENTS THAT MAKE UP A RADIO WAVE? |
|
Definition
| Magnetic field (“H” Field), Electric field (“E” Field): Determines polarization. |
|
|
Term
|
Definition
| Base unmodulated frequency the TX and RX remain locked to. |
|
|
Term
| •NAME TWO TYPES OF MODULATION? |
|
Definition
|
|
Term
| •WHAT TYPE OF MODULATION IS USED FOR WIRELESS MICROPHONE AND IN EAR–MONITOR SYSTEMS? WHY? |
|
Definition
| Frequency modulation because it has a wider frequency response (50-16kHz) and better dynamic range (90+ dB). |
|
|
Term
•WHAT TWO TYPES OF AUDIO SIGNAL PROCESSING ARE USED IN
TRANSMITTING AND RECEIVING? WHY? |
|
Definition
•Pre/Post emphasis EQ
•Companding |
|
|
Term
| •WHAT DOES TRUE DIVERSITY MEAN? |
|
Definition
| The ability to sample the radio field from 2 or more location and/or the ability to select/combine the resulting signal. |
|
|
Term
| •WHAT DIVERSITY DESIGN IS MOST COMMON? |
|
Definition
| Receiver switching diversity. |
|
|
Term
| •WHAT IS THE MINIMUM SIZE FOR A TRANSMITTING OR RECEIVING ANTENNA? |
|
Definition
| ¼ the size of the wavelength you are transmitting or receiving. |
|
|
Term
| •WHAT IS THE BEST WAY TO MAINTAIN MAXIMUM EFFICIENCY BETWEEN A TRANSMITTING AND RECEIVING ANTENNA? |
|
Definition
| Line of sight between TX and RX. |
|
|
Term
| •NAME 4 TYPES OF COMMONLY USED ANTENNA DESIGNS. |
|
Definition
•Ground Plane
•Whip
•Yagi
•Logarithmic periodic dipole array (LPDA)
•Helical
•Circularly Polarized |
|
|
Term
| •WHAT ARE THE TWO TYPES OF ANTENNA DISTRIBUTION AND WHEN WOULD WE USE THEM? |
|
Definition
| Passive (up to 2), Active (more than 2). |
|
|
Term
| •WHAT CAUSES “DROP OUT”, “NOISE UP” AND “HITS”? |
|
Definition
•Obstructions
•Dead or dying Batteries
•Multi-path Effects |
|
|
Term
| •WHAT IS THE PURPOSE OF THE SQUELCH CIRCUIT? |
|
Definition
| To mute the audio output of the receiver when RF signal level falls below a set threshold. |
|
|
Term
| •WHICH FREQUENCY BAND HAS its TRANSMITTER POWER LIMITER TO 50mW? |
|
Definition
| VHF (Very High Frequency) |
|
|
Term
| •WHICH FREQUENCY BAND HAS its TRANSMITTER POWER LIMITER TO 250mW? |
|
Definition
| UHF (Ultra High Frequency) 300-3GHz. |
|
|
Term
| •WHICH FREQUENCY BAND IS ILLEGAL TO USE AS OF JUNE 2010? |
|
Definition
|
|
Term
| •TWO CHANNELS HAVE BEEN ALLOCATED IN EVERY MAJOR CITY MARKET FOR WIRELESS USE. WHERE ARE THEY LOCATED? |
|
Definition
| UHF – TV Channel 37: the first open channel that is above and the first open channel that is below. |
|
|
