Lectronics VR Field Reference Manual - page 20
VR Field Receiver
LECTROSONICS, INC.
0
When the system is LOCKED, no settings or operat-
ing parameters may be changed from the LCD inter-
face. The system also will not enter Scan Mode. This
provides a measure of insurance against accidental
changes while still allowing all parameters to be viewed.
Attempts to change a parameter or enter Scan Mode
when the system is LOCKED results in the LOCKED!
screen message being displayed. The only exception is
the LockSet Setup Screen itself.
Scan Function
Warning: Do not enter the Scan Function
during normal operation. This is a setup
mode and not an operating mode. The
Scan Function automatically removes two
receiver modules from normal operation (one
from each frequency block) and uses them
to scan the frequency block ranges. (The
reciever modules used for scanning cannot
be changed by the user.) Entering the Scan
Function during normal operation may result
in unwanted audio interferrence, or accidental
retuning of the scanning receiver modules.
The VR Field System has an integrated scanning
function that displays a spectrum analysis as it scans
across the frequency block range. The purpose is to
find unused frequencies, or frequencies with minimal
RF interference. The Scan function has three modes:
Scan, Stop and Zoom. These modes are displayed on
the Scan screen and are accessed by pressing the front
panel Function button.
Note: The current Scan mode is displayed in the
upper left corner of the Scan screen. The mode
which will be selected by pressing the Function
button is highlighted and located under the current
Scan mode.
To use the integrated scanning function, from the Over-
view Screen push the MENU/SELECT control to enter
the Top Menu then rotate the control to highlight Scan.
Pressing the MENU/SELECT control again begins the
scanning function.
Scan Mode
The LCD switches to the Scan screen and automatically
starts progressively scanning all installed frequency
blocks. The unit will scan continually, accumulating the
highest peak seen on each channel with each sub-
sequent pass, until stopped by pressing the Function
button or the MENU/SELECT control. Data gathered
during the scanning process shows the “worst case
scenario” for any given channel and is retained until the
VRM is turned off or scanning is reset by momentarily
pressing the POWER On/Off switch.
In Scan mode, the highlighted Receiver Module boxes
are the receiver modules automatically selected for use
for spectrum analysis. The user cannot change this
selection. The lowest numbered receiver from each fre-
quency block is used. They are essentially “borrowed”
for the scanning function and are returned to their
original frequencies in Stop or Zoom modes, or when
Scan is exited.
In Scan mode, each vertical band of the display repre-
sents eight frequencies (800 kHz).
Warning: If one of the receiver modules is
manually tuned in Stop mode or Zoom mode,
the new frequency setting will persist when
exiting Scan. Moving the cursor for the
selected receiver module tunes that receiver in
real time.
Press.Function.
button.to.halt.
scanning
Receiver.Modules.automatically.
selected.for.scanning
Accumulated.peaks
Currently.Selected.Receiver.Module
Transmitter.Frequency.Select.
Switch.settings.(Cursor.Location)
Press.Function.
button.to.enter.
Zoom.mode
Press.
Function.
button.to.
resume.
scanning
Current.Scan.
mode
Relative.position.of.
6.6.MHz.window.in.
frequency.block
Currently.Selected.
Receiver.Module