8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART II
January 2019
Page 63 of 153
If the APX ‘DVRS Enabled’ PSU needs to support say 10 TGs via the DVRS, then the
PSU may be programmed with a single Conventional Personality, which is using a
Conventional System of ‘DVRS’ type. The Conventional Personality’s Frequency Option
table will contain 10 entries, which are strapped to desired TG IDs. The actual TG IDs are
specified in the designated Astro Talk Group List, which is then linked to the Conventional
Personality (‘Astro Talkgroup’ tab). The PSU behavior, when switched to a DVR channel,
is specified by programming the desired features in the corresponding Conventional
System ‘DVRS’ Tab. Each Frequency option of the Conventional Personality (using
desired TG ID and a ‘DVRS’ type Conventional System) is then assigned to a PSU mode
in the Zone Channel Assignment listing. Alternatively, the PSU can be programmed with
just one (or a few TG IDs) and
TG translation
can be enabled in the DVR so that the PSU
TG ID is always translated to the ID of the TG selected on the MSU Control Head.
Programming of Generic P25 PSU for Digital DVRS Mode
The programming of a Generic P25 PSU requires matched DVR
– PSU programming of:
•
DVR Tx and Rx Frequencies
•
Tx and Rx NIDs (NACs)
In addition, the programmed PSU ASTRO Unit ID and selected TG ID must be valid and
allowed on the P25 system.
Programming of the P25 PSU (Generic P25 or DVRS enabled) for operation
on Conventional P25 MSU System
Both PSU types must have the Tx and Rx NIDs matched with those programmed in the
DVR. If the P25 conventional system is not using dedicated TG IDs then all system radios
transmit with the default TG ID = 1.
When the XTS PSU is programmed as ‘DVRS Enabled’, and ‘Talkgroup’ is checked in the
given conventional personality, the PSU transmits with default TG ID = 2. When the
system radios are operating on a conventional P25 system, which is not using Talkgroups,
all radios still transmit with default TG ID = 1. Therefore, the DVRS Enabled XTS PSU
programming may need to be changed to TG ID=1 in order to match the rest of the system
radios so that communications can be heard between DVRS PSUs and system PSUs.
The Generic P25 PSU transmits with default TG ID = 1 so it matches the rest of the system
radios and its programming does not need to be changed.
NOTE:
TG ID 1 can be added to the DVRS Translation tables so that PSU calls coming from
Generic P25 PSUs (with TG ID 1) will be translated to the TG ID currently selected on the
MSU, while ‘DVRS Enabled’ PSUs will be able to make proxied calls on their selected TG
IDs.
If the conventional P25 system is using dedicated TG IDs, then the
‘DVRS Enabled’ or
Generic P25 PSU must be programmed with corresponding conventional personalities
using the required TG IDs.
