The BP-325 is a portable beltpack for use with RTS Two-Wire intercom systems. The BP-325 is a binaural (stereo) programmable two-channel beltpack with program-input capability. The BP-325 is for use with a dynamic microphone only.
RTS BP-325 Features
- Call Function
- Headset
- Microphone Kill Detect
- Powered Externally
- BP-325 2-channel binaural programmable beltpack1
- Power Requirements+18 to +33 VDC, 30 VDC nominal (standard RTS line), 45 to 85mA
- Impedance Across Intercom Line10kΩ typical
- Noise Contribution to 200Ω Intercom Line-75 dBu
- Headphone Amplifier
- Maximum Voltage Gain: 30 dB
- Frequency Response: 100 Hz to 8 kHz, +/-3 dB
- Headphone Impedance: 50 to 600 Ω
- Output Power: 150 mW/150 Ω
- Output Voltage Level: 8 volt peak-to-peak
- Microphone Preamplifier
- Maximum Voltage Gain: 54 dB
- Frequency Response: 100 Hz to 8 kHz, +/-3 dB
- Input Impedance: >1k Ω
- Limiter Range: 30 dB
- Program Input
- Maximum input level: +20 dBu
- Nominal input level: -10 to +8 dBu
- Frequency response: 100 Hz to 12 kHz, ±3 dB
- Monoaural Dynamic-mic Headset Connector
- XLR-4-31 receptacle (J13)
- Pin 1 - Microphone low
- Pin 2 - Microphone high
- Pin 3 - Common
- Pin 4 - Headphone high
- Stereo Dynamic-mic Headset Connector
- XLR-5-31 receptacle (J14)
- Pin 1 - Microphone low
- Pin 2 - Microphone high
- Pin 3 - Common
- Pin 4 - Headphone left high
- Pin 5 - Headphone right high
- Carbon-mic Headset Connector (J1)
- ¼-inch, 3-conductor Phone Jack
- Used for Headset
- Tip - Carbon microphone
- Ring - Headphone
- Sleeve - Common
- Used for Mic Switch
- Tip - Remote switch normal-open contact
- Ring - No connection
- Sleeve - Remote switch common
- Intercom Line Input Connector (J11)
- XLR-3-31 female receptacle
- Pin 1 - Common
- Pin 2 - +30 VDC In & audio
- Pin 3 - Channel 2 intercom audio
- Used for Program Input
- Pin 1 - Common
- Pin 2 - Program input high
- Pin 3 - Program input low
- Used for Remote Mic Switch and/or External Power
- Pin 1 - Common
- Pin 2 - +22 to +24 VDC
- Pin 3 - Remote switch normal-open contact
