Modification Of "Common Data" Parameters; Master/Slave Dcs; Ptt1 State; Pre-Emphasis - Vertex VXR-1000 Service Manual

Note: If the Yaesu system is used, you must
program only CTCSS or Carrier Squelch to
be used for the main coded squelch signal
(for communication between the portable
and the VXR-1000. The CE-22 will not al-
low the use of DCS if the Yaesu system is
selected, because the Yaesu system needs to
use DCS for coding for the Master Tone sig-
nal.

20-3: Master/Slave DCS

This function sets the DCS code to be em-
ployed by the Master VXR-1000. This DCS
code is sent to other arriving VXR-1000s,
whereby the first VXR-1000 on the scene
announces itself as the Master.
Press [ENTER] to display the CODE SE-
LECT window, from which you may select
a DCS code using the Arrow keys; press
[ENTER] again to accept the selected code,
or press [ESC] to cancel.
If you know the three-digit DCS code you
want, you can enter it directly using the 0 -
9 keys. When the desired DCS code is dis-
played, press [ENTER] to accept this value.
If you keyed in an invalid code number (not
among the "standard" DCS code list), the
CODE SELECT window will appear, with
the nearest valid DCS code number pre-se-
lected.
21. Modification of
"Common Data" Parameters
The following command parameters are
found in the "Edit Common Data" window.
These parameters are common to all chan-
nels in the VXR-1000 being programmed,
unlike the previous command parameters
(which can be set on a channel-by-channel
basis).

21-1: PTT1 State

This command allows customization of the
"Mobile COR Detect" signal at Pin 7 of J1004
(on the VXR-1000). This permits the VXR-
1000 to work with either "Active High" or
"Active Low" COR Detection signals from
the mobile.
CE-22 Program Software
High: If the connected mobile radio uses an
"Active High" system, set the PTT1
State parameter to High.
Low: If the connected mobile radio uses an
"Active Low" system, set the PTT1
State parameter to Low.
For control purposes, High is defined as 33.5
Volts, while "Low" is defined as ≤2.5 Volts.
There is no "pull up" facility provided on
this connector pin.
21-2: PTT2 State
This command allows customization of the
status of the "Mobile TX Detect" line applied
to Pin 9 of J1004 on the VXR-1000. This al-
lows either "Active High" or "Active Low"
TX Detect signals from the connected mo-
bile to be used.
High: If the connected mobile radio's "TX
Detect" line goes "High" during mo-
bile transmission, set this parameter
to High.
Low: If the connected mobile radio's "TX
Detect" line goes "Low" during mo-
bile transmission, set this parameter
to Low.
Levels used for this command are identical
to those in section 21-1, and there likewise
is no "pull-up" facility provided on this line.

21-3: Pre-Emphasis

When the VXR-1000 is receiving a signal
from the portable radio, the received audio
is fed to the connected mobile radio via Pin
2 of J1004 (on the VXR-1000). This parame-
ter allows this audio signal to have either a
flat response, or to have 6 dB/Octave pre-
emphasis applied.
Off: No pre-emphasis will be applied.
On: Pre-emphasis will be applied to the
signal applied to the connected mobile
radio's modulator circuit.
If the connected mobile injects this audio
signal to its modulator prior to the mobile's
internal pre-emphasis network, please set
this parameter to Off. If the audio input is
applied downstream from the internal pre-
21