BST 25-216 Base Station Transmitter

Remote Program Monitoring • Personal Cueing • Assistive Listening

• 57 User-Selectable Channels
• Balanced Mic or Line Level Input
• Companded and non-Companded Audio Processing

The BST 25-216 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 for a wireless system. For highest fidelity operation, the PR-216 receiver can be used on the wide-band companded channels. The BST 25-216 is also compatible with other manufacturer’s all-in-ear type receivers operating in the 216-217 MHz band on the narrow band non-coompanded channels with a special EQ setting. The transmitter’s microcontroller automatically sets the modulation deviation and the audio mode for companding processing when corresponding channels are selected.

Audio Inputs:
• Mic: XLR 600 ohm Balanced -40 dBV (nominal)
• Line: XLR > 10 k ohm Balanced 0 dBV (nominal)

• Telescopic antenna mounts directly into top of transmitter
• BNC RF output connector for optional external antenna

RF Output Power: Set for 100 mW

Operation Indicators:
• LED Bargraph VU Meter displays audio input (modulation)
• Two-Digit Alpha Numeric Display shows operating channel
• Five-Digit Numeric Display shows operation frequency
• Antenna indicator displays deficient antenna condition
• Lock-out Indicator shows tuning has been disabled

Power Requirements: 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; recover 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

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.

FCC Compliance: Parts 22, 74 and 90


All documents are in PDF format.

>> BST 25-216 Tech Sheet
>> BST 25-216 User Manual


The BST 25-216 Base Station Transmitter is compatible with the following receivers:

>> PR-216
>> PR-216 Option 7