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COMTEK's
BST-50b transmitter is designed to meet the high demands of assistive
listening, language interpretation, and other high fidelity one-way radio
link applications.
A wide variety
of special features enable this transmitter to work with any existing
sound installation. Plus, the BST-50b transmitter maintains complete compatibility
with existing wide-band or narrow-band assistive listening receivers of
any make, including companded and non-companded receivers, for high fidelity
sound reproduction. What's more, the BST-50b offers the added versatility
of higher power operation for large arenas and stadiums.
Here are
just a few of the unique COMTEK advantages this product offers:
-
50 user-selectable
non-companded channels in the 72-76 MHz frequency range: channels
1-40 for narrow-band operation; channels A-J for wide-band operation;
and 88 narrow-band companded channels for higher power operation.
-
Bright,
single-window LED display for exact frequency and channel, VU meter,
and special function indicators. Display can be turned off to conserve
power when battery operated.
-
Audio
processing system can operate companded (2:1 compression) or non-companded
to accommodate a greater variety of receivers.
-
Microprocessor
automatically adjusts for wide-band channels A-J, and narrow-band
channels 1-40.
-
Switchable
EQ circuit for superb speech intelligibility, or full range high fidelity
for remote monitoring of mixer output.
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Balanced
mic or line level input with 60 dB of control range to accommodate
any audio level or can also operate from intercom feed line.
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Test
tone generator for receiver testing and audio level referencing.
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Can be
rack-mounted for AC or 12 volt DC power. BST-50b can accommodate a
variety of remote antennas.
The BST-50b
is compatible with the PR-75, PR-216B 72-76 MHz,
and the PR-72b receivers.
BST-50b
Rear Panel
BST-50b
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 input.
- XLR-4
Male power input 12 volts.
- BNC
type RF output connector.
|
| Operation
Indicators:
|
- LED
Bargraph VU meter displays audio input (modulation).
- Two-Digit
Alpha Numeric Display shows operating channel.
- Five-Digit
Numeric Display shows operating frequency.
- Antenna
Indicator displays deficient antenna condition.
- Lock-out
Indicator shows tuning has been disabled.
|
| Antenna: |
Telescopic
antenna mounts directly into top of transmitter or operational external
antenna through BNC RF output connector. |
| FCC
Compliance: |
Type
Accepted under Part 90. |
| Power
Requirements: |
12
volts DC, 300 mA max. |
| Frequency
Response: |
80
Hz to 15 kHz. |
| Dimensions: |
6
1/2" W x 1 3/4" H x 6 5/8" D (Rack-mounting adapter
kit is available for standard 19" rack mount). |
| Weight: |
44
oz. |
| Frequency
Response: |
80
Hz to 15 kHz. |
| Audio
Distortion: |
Less
than 0.5% 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: |
- Up
to 50 kHz deviation for wide-band channels.
- 10
kHz deviation for narrow-band channels.
|
| Maximum
Output Power: |
120
mW.
|
| Frequency
Stability:
|
Better
than 0.002% digitally synthesized, crystal controlled. |
| Operating
Radio Frequency: |
72-76
MHz. |
| Harmonic
and Spurious Emissions: |
Better
than 55 dB below carrier. |
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