Lectrosonics R1a - Manual (Page 6)

R1a
LECTROSONICS, INC. 6
Receiver Normal Operation
(already programmed)
1. Set the Frequency of the receiver to match the
frequency of the transmitter by using the two HEX
rotary switches located on the side of the receiver
under the sliding door. The 1.6M switch is for
“coarse” adjustment (1.6 MHz per click) and the
100k switch is for “fine” adjustment (0.1 MHz per
click). Setting both to zero (0,0) is the low frequen-
cy end of the block and setting both to F (F,F) is the
highest frequency end of the block.
NOTE: Block 944 covers a special frequency
range starting at 0,0 for 944.100 MHz through 4,E
for 951.900 MHz for this limited band.
2. Plug an earphone or headset into the 3.5mm jack.
Be sure the unit has a good battery.
3. Rotate the knob clockwise to switch the power ON
(Do NOT hold the knob in while switching power
ON). The LED will illuminate. Rotate the
knob to set the desired audio level.
4. If channel frequencies have been stored in the
memory, change channels by pressing the knob
briefly and release. The LED will blink the next
channel number (frequency) and the receiver will
resume operation on that channel. If no channel
frequencies have been stored when pressing the
knob to change channels, the LED will flash from
green to red to yellow to green, indicating no stored
channels and the unit will resume operation on
the channel set by the switches.
5. Whenever the power is switched ON, the unit de-
faults to the frequency set by the switches.
Add a New Frequency to
The Next Open Channel
Before operating a receiver, one or more IFB T1 or T4
transmitters must be placed in XMIT mode, with each
transmitter set to the desired frequency and connected
to a proper antenna, audio source, and power source.
The transmitter frequency block must be the same as
the receiver frequency block as marked on each unit.
1. Position the receiver at a location within 20 to 100
feet of the transmitter or transmitters.
2. With the power ON, depress the knob until the LED
starts rapidly blinking, then release the knob.
3. The unit goes into program mode and does a scan/
search. Previously programmed frequencies will
be automatically skipped. When the unit stops on
a new frequency audio from the transmitter will be
heard in the earphone and the LED will stop blink-
ing rapidly and will change to a slow blink mode.
The unit is now waiting for an operator decision.
You must now decide to either SKIP or STORE the
frequency (step 4 or 5 below.) Switching the power
to OFF without storing will delete the frequency.
4. To SKIP the frequency, depress the knob briefly
and the scan/search will resume.
5. To STORE the frequency into a channel memory,
depress the knob and hold it until the LED blinks
the new channel number, then release the knob.
The frequency is now stored in an open channel.
6. The unit will continue scan/search for other fre-
quencies. To store more frequencies repeat steps 4
and 5 above. Up to 5 frequencies can be stored in
memory channels.
7. When all desired frequencies are stored switch the
power to OFF for a few moments, then switch back
to ON. The unit will default to the channel number
set by the switches and resume normal operating
mode.
8. The first scan is made at low sensitivity and search-
es for only high level transmitter signals to avoid
intermods. If the receiver does not stop on any
frequency in the first scan, that means an IFB trans-
mitter was not detected. In this condition the LED
will change from a fast blink to a slow blink indicat-
ing the end of the scan. The complete scan should
take 15 to 40 seconds.
9. A second scan at high sensitivity is initiated by de-
pressing the knob briefly at the end of the first scan
to search for low level transmitter signals. When
the scan stops and the transmitter audio is heard,
either SKIP or STORE the frequency (step 4 or 5
above).
10. If the receiver still does not stop on any frequency,
check that the transmitter is ON. Also, if a frequen-
cy is not received or received but distorted, some
other signal may be interfering on that frequency.
Change the transmitter to another frequency and
try again.
11. Switching the POWER to OFF during any mode
simply terminates that mode and returns the unit to
normal operating mode when the power is switched
back to ON.
Note: If knob does not change frequencies or
begin scanning when pressed, check to see if its
function has been changed - see instructions on
page 9.