Vertex Standard VXR-1000, Service Manual

Page: 22 / 54

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emphasis network, please set this parame-
ter to On.
21-4 : De-Emphasis
The audio signal received by the connected
mobile (received from the base station) is
applied to the VXR-1000 via Pin 6 of J1004.
This command allows de-emphasis to be
applied (or not applied) to this audio sig-
nal, depending on the condition of the au-
dio signal as it left the mobile radio's receiver
section.
On : De-emphasis of -6 dB/Octave will be
applied to the incoming audio signal.
Off : No de-emphasis will be applied to the
incoming audio signal.
If the connected mobile applies de-empha-
sis to the audio prior to routing the audio to
the VXR-1000, please set this parameter to
Off. If the audio exits the mobile radio be-
fore de-emphasis is applied at the mobile
radio side, please set this parameter to On.
21-5 : EXT MIC Level
When audio from the connected mobile ra-
dio's microphone is routed to the VXR-1000
(via Pin 8 of J1004) for simultaneous trans-
mission by the mobile and the VXR-1000,
using the mobile's microphone as the audio
source, this command allows configuration
of the VXR-1000 so as to be compatible with
the expected microphone audio level.
High : The input level is between -18 dBm
and 0 dBm.
Low : The input level is between -44 dBm
and -18 dBm.
21-6 : EXT MOD Level
When receiver audio from the connected
mobile radio is routed to the VXR-1000 (via
Pin 6 of J1004), this command allows con-
figuration of the VXR-1000 so as to be com-
patible with the expected receiver audio lev-
el.
High : The receiver audio level is between -
18 dBm and -2 dBm.
Low : The receiver audio level is between-
36 dBm and -18 dBm.
21-7 : Band
This parameter must be set for the band on
which the VXR-1000 is transmitting.
21-8 : COM Port
Set this parameter for the COM port you will
use for data uploading and downloading.
Either COM1 or COM2 may be used.
21-9 : Trunking Data
When the connected mobile radio is config-
ured as a trunked radio, the VXR-1000's tim-
ing parameters must be compatible with
those used in the trunking system in use.
The default values are:
E-TX Time: 200 ms.
PTT2 Detector Time: 200 ms.
Connect Wait Time:
4800 ms.
Waiting Time: 2000 ms.
These parameters may be modified, if nec-
essary, per the information presented below.
E-TX Time :
This is the length of the PTT signal sent to
the trunked mobile in response to a connec-
tion request from the portable radio.
PTT2 Detect Time
:
This is the length of the Mobile TX Detect
response signal sent to the VXR-1000 from
the trunked mobile in response to a success-
ful trunking request.
Connect Wait Time :
This is the length of time which the trunked
mobile will wait between connection re-
quests to the trunking system.
Waiting Time :
When the trunking system has successfully
initiated a connection with the connected
mobile radio, the connection acknowledg-
ment tone will be sent from the trunked
mobile, via the VXR-1000, to the portable.
The portable must then respond with its ini-
tial transmission within the time window set
via this parameter, or else the connection to
the trunking system will be terminated (to
avoid tying up the system).
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