Vector-LP Radio Beacon Transmitter Technical Instruction Manual
Page
3-11
Section 3 Operating Instructions
Issue 1.1
Table 3-4:
Remote Interface PWB Controls and Indicators
REF DES
PANEL
MARKING
DESCRIPTION
E4
Press-To-
Talk/Phantom
Feed
Bi-position selection jumper that is installed based on the type
of mode to enable voice operation. The jumper is factory
installed for ‘press-to-talk’ mode, position
A
(shorting pins 1
and 2). For ‘phantom feed’ mode, install the jumper in
position
B
(shorting pins 2 and 3). In ‘press-to-talk’ mode a
ground is applied to TB1-12 to enable voice. In ‘phantom
feed’ mode, -15 V is applied to the shield of the audio to
enable voice.
E5 – E8
Single/
Differential
Bi-position selection jumpers that configure the remote
interface PWB to accept either single-ended or differential
remote control inputs.
x
A differential input is selected when the jumper shorts
pins 1 and 2 of its associated 3-pin header.
x
A single-ended input is selected when the jumper shorts
pins 2 and 3 of its associated 3-pin header.
E11
NORMAL/
BYPASS
Factory default is shorting pins 1 and 2. No user adjustment
is required.
E13 – E15
E17
NORM/NDB
Bi-position selection jumpers that are installed in positions
determined by the type of transmitter. In NDB transmitters,
the jumpers are factory installed in the
NDB
position (shorting
pins 2 and 3). No user adjustment is required.
E18
NORM/
BATTERY
Bi-position selection jumper that should always be installed in
the
NORM
position (shorting pins 1 and 2).
R37
AUDIO LEVEL
Adjusted for 100% modulation when the modulating audio is
between -20 dBm and +10 dBm and its amplitude is the level
that is expected to produce 100% modulation.
R163
MONITOR
LEVEL
Adjusted to set the level of the
RF MONITOR
output, which is
a sample of the RF output. This output is located on BNC
connector J8 on the remote interface PWB).
