Glossary-2
Glossary
carrier squelch
Feature that responds to the presence of an RF carrier by opening or
unmuting (turning on) a receiver's audio circuit. A squelch circuit
silences the radio when no signal is being received so that the user
does not have to listen to “noise.”
central controller
A software-controlled, computer-driven device that receives and
generates data for the trunked radios assigned to it. It Monitors and
directs the operations of the trunked repeaters.
channel
A group of characteristics, such as transmit/receive frequency pairs,
radio parameters, and encryption encoding.
CMOS
Complementary metal-oxide semiconductor.
CODEC
coded squelch
Used on conventional channels to ensure that the receiver hears only
those communications intended for the receiver.
codeplug
Firmware that contains the unique personality for a system or device. A
codeplug is programmable and allows changes to system and unit
parameters.
coder/decoder
A device that encodes or decodes a signal.
control channel
In a trunking system, one of the channels that is used to provide a
continuous, two-way/data-communications path between the central
controller and all radios on the system.
conventional
Typically refers to radio-to-radio communications, sometimes through a
repeater. Frequencies are shared with other users without the aid of a
central controller to assign communications channels.
conventional scan
list
A scan list that includes only conventional channels.
CPS
See Customer Programming Software.
cursor
A visual tracking marker (a blinking line) that indicates a location on a
display.
Customer
Programming
Software
Software with a graphical user interface containing the feature set of an
ASTRO radio.
D/A
See digital-to-analog conversion.
DAC
See digital-to-analog converter.
deadlock
Displayed by the radio after three failed attempts to unlock the radio.The
radio must be powered off and on prior to another attempt.
default
A pre-defined set of parameters.
Term
Definition
Содержание APX 4000
Страница 1: ...APXTM TWO WAY RADIOS APX 1000 APX 2000 APX 4000 APX 4000Li BASIC SERVICE MANUAL ...
Страница 6: ...Notes iv Commercial Warranty ...
Страница 8: ...ii Notes ...
Страница 16: ...x Portable Radio Model Numbering System Notes ...
Страница 46: ...3 12 Basic Theory of Operation Controller Section Notes ...
Страница 60: ...5 12 Performance Checks Transmitter Performance Checks Notes ...
Страница 90: ...6 30 Radio Alignment Procedures Performance Testing Figure 6 41 Transmitter Test Pattern Screen 900 MHz ...
Страница 128: ...8 34 Disassembly Reassembly Procedures Ensuring Radio Submergibility Notes ...
Страница 138: ...10 6 Exploded Views and Parts Lists APX 2000 APX 4000 APX 4000Li Back Kit Exploded View Parts List Notes ...
Страница 142: ...Index 4 Index Notes ...
Страница 143: ...Title Page ASTRO APX 1000 Digital Portable Radios Section 2 VHF UHF1 UHF2 700 800 MHz APX 1000 ...
Страница 144: ...ii Notes ...
Страница 150: ...viii List of Figures Notes ...
Страница 152: ...x Portable Radio Model Numbering System Notes ...
Страница 208: ...6 24 Radio Alignment Procedures Performance Testing Figure 6 30 Transmitter Test Pattern Screen 700 800 MHz ...
Страница 240: ...7 32 Disassembly Reassembly Procedures Ensuring Reliable Splash Protection Notes ...
Страница 250: ...9 6 Exploded Views and Parts Lists APX 1000 Back Kit Exploded View Parts List Notes ...
Страница 254: ...Index 4 Index Notes ...
Страница 255: ...Title Page ASTRO APX 1000 Digital Portable Radios Section 3 900 MHz APX 1000 ...
Страница 256: ......
Страница 262: ...viii List of Figures Notes ...
Страница 264: ...x Portable Radio Model Numbering System Notes ...
Страница 278: ...3 8 Basic Theory of Operation Controller Section Notes ...
Страница 336: ...7 32 Disassembly Reassembly Procedures Ensuring Reliable Splash Protection Notes ...
Страница 346: ...9 6 Exploded Views and Parts Lists APX 1000 Back Kit Exploded View Parts List Notes ...
Страница 350: ...Index 4 Index Notes ...
Страница 351: ...Title Page ASTRO APX APX 2000 APX 4000 Digital Portable Radios Section 4 APX 2000 APX 4000 Two Knobs ...
Страница 352: ...ii Notes ...
Страница 360: ...x Portable Radio Model Numbering System Notes ...
Страница 400: ...5 12 Performance Checks Transmitter Performance Checks Notes ...
Страница 427: ...Radio Alignment Procedures Performance Testing 6 27 Figure 6 34 Transmitter Test Pattern Screen 700 800 MHz ...
Страница 428: ...6 28 Radio Alignment Procedures Performance Testing Notes ...
Страница 434: ...7 6 Encryption Erase an Encryption Key Notes ...
Страница 478: ...8 44 Disassembly Reassembly Procedures Ensuring Radio Submergibility Notes ...
Страница 488: ...10 6 Exploded Views and Parts Lists APX 2000 APX 4000 Two Knobs Back Kit Exploded View Parts List Notes ...
Страница 489: ...Title Page ASTRO APX 1000 APX 2000 APX 4000 APX 4000 Li Digital Portable Radios Section 5 Appendices ...
Страница 490: ...ii Notes ...
Страница 492: ...A 2 Accessories Notes ...
Страница 496: ...Notes B 4 EMEA Warranty Service and Technical Support Further Assistance From Motorola ...
Страница 500: ...C 4 LACR Replacement Parts Ordering and Motorola Service Centers Motorola Service Centers Notes ...
Страница 520: ...Glossary 12 Glossary Notes ...
Страница 524: ...Index 4 Index Notes ...
Страница 525: ......