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The PR-75a
personal receiver is the newest generation of COMTEK's user-friendly,
digitally synthesized monitor receivers designed for high fidelity auditory
assistance and other personal communication applications. Ideal where
multiple transmitters in the 72-76 MHz band are operating independently
in the same building, the PR-75a AutoSmart-Tuning™ makes it possible
for the listener to use the same receiver to attend multiple programs
at church services, school classes, museum exhibits, theaters, and stadiums,
etc.
This unique
receiver will automatically turn itself on and initiate its AutoSmart-Tuning™
when the earphone is plugged in. The PR-75a's AutoSmart-Tuning™ process
selects the closest appropriate transmitter in its vicinity and then sets
itself to this channel. This also establishes the receiver's compatible
frequency group when multiple channel operation is in use in the same
area. A convenient one-button tuning control will cause the receiver to
seek only channels belonging to its frequency group, eliminating the possibility
of tuning to an incorrect channel.
A single
LED indicator system monitors all necessary receiver functions:
- During
the initial tuning process, the LED indicator will blink very rapidly
indicating channel selection.
- The LED
indicator will illuminate continuously when a signal is being received.
- A steady
slow LED flash rate indicates that the receiver is no longer receiving
a signal.
- The LED
will flash rapidly indicating that the 3 volt battery supply has fallen
below 2 volts and the unit must be recharged or two new AA size 1.5
volt batteries are needed.
The PR-75
is compatible with the M-72 type L transmitter and the BST-50b digitally
synthesized base station transmitter.
FP-75
Field Programmer
The
FP-75 Field Channel Programmer provides a quick and convenient way to
change the channels of large numbers of PR-75 receivers to accommodate
different venues requiring a different set of channels. The programmer
will allow the receiver to receive one or more designated channels or
any specific group channels that can then be manually accessed in sequence
for "roundabout" type of channel selection with the AutoSmart-Tuning™
button (AST). In this mode of operation the AutoSmart-Tuning™ function
is inhibited and only the channel or channels programmed will be received.
<Download
FP-75 Tech Sheet>
| Audio
Output: |
Headset
output + 8 dBV (2.5V RMS). |
| Connectors: |
- Stereo/mono
3.5 mm audio output connector and charging input, and receiver
turn on.
- 2.5
mm stereo connector for I/O data programming.
|
| Indicators: |
Single
LED
- Channel-seeking.
- Received
signal.
- No
signal.
- Low
Battery
Periodic
audible beeping indicates low battery condition.
|
| Controls: |
- Volume
control (50 dB range).
- Automatic
turn-on when headphone is plugged in and turn off when headphone
is removed.
- One-button
tuning reset.
|
| Audio
Frequency Response: |
100
Hz to 10 KHz ±3 dB. |
| Harmonic
Distortion: |
Less
than 1% (1 KHz tone 30 KHz deviation). |
| Operating
Radio Frequency: |
- 72
to 76 MHz.
- 10
frequency synthesized wide-band channel, Auto-Select tuning.
|
| Frequency
Stability: |
0.002%
frequency synthesized crystal controlled. |
| Deviation
Acceptance: |
Up
to ±75 KHz. |
| Ultimate
Quieting: |
Better
than 75 dB (A weighted) related to output. |
| RF
Sensitivity: |
2
uV for 38 dB of quieting. |
| Antenna: |
Integral
with headphone cable (no external antenna). |
| Battery
Life: |
100
hours with alkaline battery. |
| Power
Requirements: |
Two
1.5 volt AA alkaline batteries or rechargeable NiMH. |
| FCC
Compliance: |
Complies
with Part 15 of FCC rules. |
| Dimensions: |
1
1/16" x 2 1/2" x 3 1/4" (27 mm x 57 mm x 83 mm). |
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