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Speech EQ

On the back of the transmitter there is a switch labeled “EQ”. With
this function enabled (switch up), the audio dynamics and frequency
response are processed to improve intelligibility of speech.  If the
primary audio source is going to be speech, you should enable this
processing.  If the main audio source is going to include music or
other program information, you should disable it.  You may want to
experiment to determine which position sounds most pleasing with
the program source you intend to use.

Display On / Off

The digital display can be turned on or off using the “DISPLAY”
switch.  Disabling the display reduces the current consumption of the
transmitter for battery operation.  In environments where the display
could be distracting, disabling the display may also be appropriate.
When the display is disabled, the tuning controls are also disabled,
ensuring the transmitter frequency is not changed inadvertently.  With
the display disabled one segment is turned on as a power indicator.
Additionally the “LOCK OUT” indicator is illuminated indicating the
tuning is disabled.  The VU meter and the “ANTENNA” indicator are
unaffected.

Lock Out

After the transmitting frequency has been determined the transmitter
tuning function can be disabled with the “LOCK OUT” switch on the
back of the transmitter.  This ensures that the transmitter operating
frequency is not inadvertently changed.  The “LOCK OUT” indicator
(above the first numeric digit on the display) will illuminate indicating
that the tuning has been disabled.  When rack-mounting the transmitter
this switch must be accessed from behind the rack, this provides
added protection from intentional tampering.

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Summary of Contents for BST-50b

Page 1: ...Synthesized Base Station Transmitter BST 50b OPERATOR S MANUAL 72 76 MHz 357 West 2700 South Salt Lake City Utah 84115 Phone 800 496 3463 Fax 801 484 6906 www comtek com...

Page 2: ...ications This transmitter operates under F C C Part 90 in the business band which allows for higher power ideal for large area venues such as stadiums coliseums and auditoriums The BST 50b transmits o...

Page 3: ...ling the BST 50b as per above and then while the BST 50b is operating checking all audio outputs for uncharacteristic noise If a problem is found move the BST 50b or the remote antenna as far as possi...

Page 4: ...round leaving pin 3 as the audio source Please note that it is recommended that all audio input cables be kept as short as possible Set up a Select an appropriate location for the BST 50b i e a sound...

Page 5: ...that the antenna indicator is not flashing If the antenna indicator is flashing shorten the telescoping whip antenna by 2 inches and again check the indicator Continue this procedure until the indicat...

Page 6: ...on the back of the base station clockwise until the VU meter on the front panel begins to deflect Only very loud speech or music should deflect the VU meter full scale Audio Processing and Frequency S...

Page 7: ...standard groups see frequency group charts on page 11 or you can use COMTEK s frequency selection guide software to determine appropriate frequencies Contact COMTEK to obtain a free copy of the frequ...

Page 8: ...istracting disabling the display may also be appropriate When the display is disabled the tuning controls are also disabled ensuring the transmitter frequency is not changed inadvertently With the dis...

Page 9: ...etting the LOCK OUT switch rear panel to ON DIGITAL FREQUENCY DISPLAY Displays the frequency on which the transmitter is operating ANTENNA INDICATOR Flashes when the transmitter senses a deficient ant...

Page 10: ...RF output for use with an external antenna SPEECH ENHANCEMENT SWITCH Enables and disables speech enhance feature Enable this function switch up for speech and disable it switch down for music LEVEL CO...

Page 11: ...86 87 88 75 330 MHz 75 350 MHz 75 370 MHz 75 390 MHz 75 420 MHz 75 460 MHz 75 500 MHz 75 540 MHz 75 580 MHz 75 620 MHz 75 640 MHz 75 660 MHz 75 680 MHz 75 700 MHz 75 720 MHz 75 740 MHz 75 760 MHz 75 7...

Page 12: ...MHz 75 960 MHz GROUP THREE FREQUENCY GROUPS BST 50b Page 11 CHANNEL FREQUENCY A B C D E F G H I J 72 100 MHz 72 300 MHz 72 500 MHz 72 700 MHz 72 900 MHz 75 500 MHz 75 700 MHz 75 900 MHz 74 700 MHz 75...

Page 13: ...for optional external antenna FCC Compliance Type Accepted under Part 90 Power Requirements 12 Volts DC 300 mA max Frequency Response 80 Hz to 10 kHz Audio Distortion Less than 0 5 at 80 modulation M...

Page 14: ...SANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF SUCH EQUIPMENT INCLUDING WITHOUT LIMITATION ANY WARRANTY THAT THE USE OF SUCH EQUIPMENT FOR ANY PURPOSE WILL COMPLY WITH APPLICA...

Page 15: ...357 West 2700 South Salt Lake City Utah 84115 Phone 800 496 3463 Fax 801 484 6906 www comtek com...

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