Lectrosonics R1a User Manual download pdf (Page 6)

R1a

LECTROSONICS, INC.

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.

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Lectrosonics R1a User Manual Page 6

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