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2.3.3 PT 81
2.4 Frequencies
2.5 Ordering
Transmitters and
Receivers
1.1 General
1.2 Controls
1.2.1 Top Panel
Refer to section 1.3 Audio
Output.
CB 40 bag
Color Coding Kit
The PR 81 portable receiver, HT 81 handheld transmitter, and PT 81 bodypack
transmitter have been factory programmed for up to 15 selectable carrier fre-
quencies. A carrier frequency label on the receiver, on the handheld transmitter,
or on the bodypack transmitter indicates the Frequency Set the unit uses and all
available carrier frequencies.
For currently available Frequency Sets and frequencies suited for intermodulati-
on-free simultaneous operation, refer to the Frequency Lists in Part VI.
If you wish to order additional transmitters or receivers operating on the same set
of frequencies as your original equipment, be sure to state the designation of your
original Frequency Set and the serial number of the original device. We need this
information to make sure your new equipment will be compatible with the original
units.
The PR 81 is a portable diversity receiver you can wear on the belt or in a shirt or
jacket pocket. You may also use the supplied Velcro fastener to mount the
receiver on a camcorder. The PR 81 operates in a UHF band from 710 MHz to
860.9 MHz using a switching subband that is up to 3 MHz wide. Subject to local
frequency allocations, you can switch the PR 81 to one of up to 15 different carrier
frequencies.
1a POWER I/O: on/off switch.
1b POWER LED: indicates battery status:
LED flashes momentarily on switching power ON and extinguishes: batteries
are O.K.
LED does not illuminate on switching power ON: no or dead batteries are in
the battery compartment.
LED constantly lights brightly: batteries will be dead in about 60 minutes.
1c RF LED: Indicates the field strength of the received signal and the squelch
status:
LED lighting green: optimum signal strength.
LED lighting red: the received signal is muted because the squelch is engag-
ed or the receiver has been set to a different channel than the transmitter.
LED does not light: power to the receiver is OFF, no batteries are in the bat-
tery compartment, or the batteries are dead.
1d AF LED: Indicates the received audio level:
LED lighting green and flashing red on peaks: optimum audio level.
LED lighting red: audio section is overloaded.
LED does not light: audio level is too low.
1e Rotary control: Sets the volume level of the headphone output.
1f Security cover: This rotatable cover prevents the POWER switch (1a) from
being actuated unintentionally. The indicator LEDs will remain visible even if
the security cover is closed.
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PART I: GENERAL
I
PART II: PR 81 RECEIVER
II
1 Description