User's Manual

IFB Receiver
Rio Rancho, NM
7
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 to 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 in Scan Mode.)
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.
Erase All 5 Channel Memories
1. With power OFF, depress the knob and turn the unit
ON. Continue to hold the knob down until the LED
starts rapidly blinking. The memory is now erased
and the unit will go into scan/search mode.
2. Continue from step 3 above - Add New Frequency.
Multiple Transmitter Setup
When using this IFB receiver in a search mode, with
2 or more transmitters running at the same time, the
receiver may stop on a false signal under the following
conditions:
• 2 transmitters are on and transmitting.
• The distance from the transmitters to the IFB re-
ceiver is less than 5 feet.
The false hits are caused by intermodulation or mixing
in the front end of the IFB receiver. At a 5 to 10 foot
distance, the two carriers are so strong at the receiver,
that even this well designed front end will mix the carri-
ers and produce phantom frequencies. The IFB receiver
then halts its scan and stops on these false frequencies.
All receivers will exhibit this type problem at some trans-
mitter power level and range. You notice false signals
more with a scanning mode receiver since it will find
them all.
Prevention is simple. Do one of the following:
• Do the scan with only one transmitter on at a time.
(Time consuming)
• Increase the receiver to transmitter distance to at
least 10 feet. (Preferred)