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The BST-25/216
MHz is a professional quality, auxiliary base station transmitter designed
to operate with the PR-216 and PR-216 Option 7 synthesized receivers in
the newly assigned 216-217 MHz band under Part 95 of the FCC regulations.
The BST-25/216
MHz transmitter incorporates the latest digital and analog technologies
to produce low residual noise, wide dynamic range, and extended frequency
response rendering the most natural sound possible from a wireless system.
This transmitter
may be used for personal cueing, for tour guide applications, language
interpretation, and for assistive listening applications.
Unique
COMTEK features of the BST-25/216 MHz include:
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57 user-selectable
channels in the 216-217 MHz range: 38 standard narrow-band, non-companded
channels; 19 high-fidelity narrow-band channels with companded audio
processing.
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Single-window,
bright LED display for exact frequency and channel, VU bar graph meter,
antenna condition and lock-out indicator.
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Test
tone generator for receiver testing and audio level referencing.
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Balanced
mic or line level with 60 dB of control range to accommodate any audio
level.
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Microcontroller
automatically sets the modulation deviation, the audio mode for companding
processing, and the EQ when corresponding channels are selected.
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Can be
rackmounted for AC or 12 volt DC power and can accommodate a variety
of remote antennas.
BST-25/216
Rear Panel
BST-25/216
MHz Specifications:
| Audio
Inputs: |
- Mic:
XLR 600 ohm balanced -40 dBV (nominal).
- Line:
XLR > 10 k ohm balanced 0 dBV (nominal).
|
| Connectors: |
- XLR-3
Female audio input connector for mic and line level input.
- XLR-4
Male power input 12 volts.
- BNC
type RF output connector.
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| Operation
Indicators:
|
- LED
Bargraph VU Meter displays audio input (modulation).
- Two-Digit
Alpha Numeric Display shows operating channel.
- Five-Digit
Alpha Numeric Display shows operating frequency.
- Antenna
Indicator displays deficient antenna condition.
- Lock-out
Indicator shows tuning has been disabled.
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| Antenna: |
- Telescopic
antenna mounts directly into top of transmitter.
- BNC
RF output connector for optional external antenna.
|
| FCC
Compliance: |
Type
Accepted under Part 95. |
| Power
Compliance: |
12
volts DC, 300 mA max. |
| Frequency
Response: |
80
Hz to 8 kHz. |
| Audio
Distortion: |
Less
than 1% at 80% modulation. |
| Modulation
Limiter: |
Soft
compressor type with high (25 dB) linear overload protection, attack
time less than 1 ms, recovery time 10 ms. |
| Audio
Gain Control: |
Greater
than 40 dB. |
| Test
Tone Generator: |
400
Hz 0.05% distortion. |
| Frequency
Modulation: |
5
kH and 10 kH deviation. |
| RF
Output Power: |
Set
for 100 mW for FCC Part 95. |
| Frequency
Stability: |
Better
than 20 ppm, digitally synthesized, crystal controlled. |
| Operating
Frequency: |
216-217
MHz. |
| Harmonic
and Spurious Emissions: |
Better
than 55 dB below carrier. |
| Dimensions: |
6
1/2" W x 1 3/4" H x 5 5/8" D. |
| Weight: |
44
oz. |
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