8M083X25 Rev. 14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART II
January 2019
Page 150 of 153
Glossary
Keyword
Description
ACK
Acknowledgement of communications.
AVRA
Automated VR / DVR Activation. DVR Option which permits
automated activation of the DVR by either using a VIP input on
the MSU CH / DEK or a pin on the DVR Auxiliary cable.
Requires external logic / switch, not provided with the DVRS
hardware.
Band Lock
When enabled, causes the MSU to block usage of the same
frequency band as the DVR while the DVR is active. Enabled
by default when no in-band filter is present.
BL
Busy Lockout
– dynamic voting phase (follows the static
Primary / Secondary phase) of the DVR simulcast prevention
algorithm.
Channel
A group of characteristics, such as transmit / receive
frequency pairs, radio parameters, encryption encoding etc.
Coded Squelch
Tone Private-Line (PL) or Digital Private-Line (DPL). Used on
conventional channels for signal validation.
Conventional
Refers to radio-to-radio communications, sometimes through a
base station repeater or vehicular repeater.
Dispatcher
An individual who has radio system management duties.
DPD File
DVR personality file saved as
file_name.dpd
.
DPL Coded Squelch
A continuous sub-audible data signal transmitted with the
carrier. See Coded Squelch.
DVR
Digital Vehicular Repeater.
DVR Mode
Determines the communication exchange capabilities between
System Users and Local Portable Users; Can be set to OFF,
LOCAL or SYSTEM.
DVRS
Digital Vehicular Repeater interfaced to a Remote Mount APX
Mobile radio with or without Control Head.
‘DVRS Enabled’
PSU
APX
TM
4000, APX
TM
6000 or APX
TM
7000 Portable Radio with
enabled DVRS operation.
EPR File
File containing DVR personality (dpd) and calibration data of
the specific DVR unit. Typically saved in the following format
xxxxxxxx.epr where xxxxxxxx is the SN of the specific DVR.
