The 1RU BST-25/216 Synthesized Base Station Transmitter from Comtek is an auxiliary base station transmitter which comes with a 1RU rack-mounting faceplate. The base station transmitter is designed to operate in the 216-217 MHz band under parts 22, 74 and 90 of the FCC regulations making it compatible with other manufacturers' all-in-ear type receivers operating in this band. For highest fidelity operation, the PR-216 receiver must be used with the wide-band companded channels. An external antenna (not included) can be attached through a BNC RF connector. This transmitter may be used for personal cueing, tour guide applications, language interpretation, and assistive listening. The BST-25/216 also operates with the Phonak microEar VHF in-ear receiver in the narrow-band non-companded channels. The BST-25/216 transmitter incorporates 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.
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Comtek BST-25/216 Synthesized Base Station Transmitter with Rackmount (1 RU)
Comtek BST 25-216 RMK Overview
60 user-selectable channels in the 216 to 217MHz range: 40 standard narrow-band, non-companded channels; 20 high-fidelity narrow-band channels with companded audio processing
Single window, bright LED display for exact frequency and channel, VU bar graph meter, antenna condition and lock-out indicator
Test tone generator for receiver testing and audio level referencing
Balanced mic or line level with 60 dB of control range to accommodate any audio level
Micro controller automatically sets the modulation deviation, audio mode for processing, and the EQ when corresponding channels are selected
It can be rackmounted, and can accommodate a variety of remote antennas
Comtek BST 25-216 RMK Specs
| Audio Inputs | Mic XLR, 600 Ohms balanced -40 dBV (nominal) Line XLR, 10 Ohms balanced 0 dBV (nominal) |
| Connectors | XLR-3 female audio input connector for mic and line input XLR-4 male power input 12 V BNC type RF output connector |
| Indicators | LED bar graph 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 | BNC RF output connector for optional external antenna |
| FCC Compliance | Type accepted under Parts 22, 74, and 90 |
| Power Requirements | 12 VDC, 300 mA max |
| Freq. Response (Rec/Repro) | 80 Hz - 10 kHz |
| Audio Distortion | Less than 1% at 80% modulation |
| Modulation | Soft compressor type with high (25 dB) linear overload protection, attack time less than 1 ms, recovery time 10 ms |
| Gain Control | Greater than 40 dB |
| Generators | Test Tone: 400 Hz 0.05% distortion |
| Modulation | Frequency: 5 and 10 kHz deviation |
| RF Output Power | Set for 100 mW |
| Frequency Stability | Better than 20 ppm, digitally synthesized, crystal controlled |
| Operating Frequency | 216-217 MHz |
| Harmonic & Spurious Emissions | Better than 55 dB below carrier |
| Dimensions | 6.5 x 1.8 x 5.6" (165.1 x 45.7 x 142.4 mm) |
| Weight | 2.8 lb (1.2 kg) |
Packaging Info
| Package Weight | 3.845 lb |
| Box Dimensions (LxWxH) | 20.1 x 8.6 x 4.05" |
Comtek BST 25-216 RMK Reviews
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