Interference Management; Firmware Update Instructions - Lectronics DSR-A1B1 Instruction Manual

Interference Management

Multi-channel System Checkout
Interference can result from a wide variety of sources
including TV station signals, other wireless equipment in
use nearby, or from intermodulation within a multi-chan-
nel wireless system itself. Regardless of how the fre-
quencies were coordinated, a final checkout procedure is
always a good idea.
Scanning with the RF spectrum analyzer built into the
DSR system will identify external RF signals, but it does
not address the compatibility of the selected frequencies.
The pre-coordinated frequencies address in-system in-
termodulation, but obviously cannot take into account RF
signals from external sources that may be present in the
location where the system will be operating.
1. Set up the system for testing.
Place antennas in the position in which they will be
used and connect to the receivers. Place trans-
mitters about 3 to 5 feet apart, about 25 to 30
feet from the receiver antennas. If possible, have
all other equipment on the set, stage or location
turned on as well, especially any mixing or record-
ing equipment that will be used with the wireless
system.
2. Set all receivers on clear channels.
Turn on all receivers, but leave the transmitters
off. Observe at the RF signal strength indicator for
each receiver module. If a signal is present, change
the frequency to a clear channel where no signal
is indicated. If a completely clear channel cannot
be found, select the frequency with the lowest RF
level indication. Once all receiver modules are on
clear channels, go to step 3.
Firmware Update
Instructions
The DSR is supported in the current version of Wireless
Designer via USB connection. Be aware of the following
when preparing to connect your DSR to Wireless De-
signer via USB:
The DSR must have the micro and FPGA firmware both
updated to the most recent versions: v1.33 (micro) or
v.1.30 (FPGA) or higher. Wireless Designer version must
be at least 2.0.50 for macOS, or version 2.0.52 or higher
for Windows. These are available on our Support website
https://www.lectrosonics.com/wireless-designer.
at:
html.
Rio Rancho, NM
Two Channel Digital Receiver
3. Turn each transmitter on one at a time.
Start with all transmitters turned off. As you turn on
each one, look at the matching receiver to verify a
strong RF signal is received. Then, look at the other
receivers and see if one of them is also picking up
the signal. Only the matching receiver should indi-
cate a signal. Change frequencies on either system
slightly until all channels pass this test, then check
again to see that all channels are still clear as done
in step 2.
4. Turn each transmitter off one at a time.
With all transmitters and receivers turned on, turn
each transmitter off one at a time, in turn, and look
at the RF level indicator on the matching receiver
module. The RF level should disappear or drop to
a very low level. If it does not, change frequency on
that receiver and transmitter and try it again. When
a clear frequency is found, turn the transmitter on
and move on to the next channel.
IMPORTANT: Any time a frequency is changed
on any of the systems in use, you must start at
the beginning and go through this procedure
again for all systems. With a little practice, you
will be able to do this quickly and save yourself
some "multi-channel grief."
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