Specifications
General
Power Requirements:
Phantom Power: 24 VDC nominal (12 to 30 VDC), 175 mA
Local Power: 12 to 15 VDC, 250 mA
Dimensions: See Figure
3
Environmental Requirements:
Storage: -20
°
C to 80
°
C; 0% to 95% humidity, non-condensing
Operating: -15
°
C to 60
°
C; 0% to 95% humidity, non-condensing
Dynamic-mic Headset
Microphone: 50 to 200 ohm, dynamic (balanced or unbalanced)
Headphones: 150 to 600 ohm, monaural
Connector Type: XLR-4M
Pin 1
Microphone low
Pin 2
Microphone high
Pin 3
Headphone high
Pin 4
Headphone low
Panel Microphone
Microphone: 5 kohm, electret (-57 dB)
Connector Type: NTRK-8F
Pin 1
Common
Pin 2
Microphone high
Pin 3
+12 VDC microphone bias
Intercom Channels, Balanced Mode (SW1 set to BAL position)
Output Level: 1 Vrms nominal
Input Impedance: 300 ohms
Bridging Impedance: greater than 10,000 ohms
Sidetone: -40 dB, 35 dB adjustable range
Call Signaling:
Send: 20 kHz ±100 Hz, 0.5 Vrms ±10%
Receive: 20 kHz ±800 Hz, 100 mVrms
Mic-Kill Detect Frequency: 24 kHz ±800 Hz, 100 mVrms
Noise Contribution: less than -70 dB
Common Mode Rejection Ratio: greater than 50 dB
Connector Type: Six-position terminal block with screw-in wire clamps
Pin 1
Audio and DC Common
Pin 2
Local power (12 to 15 VDC, 65 to 150 mA)
Pin 3
Intercom channel 1 audio low and +24 VDC phantom power
Pin 4
Intercom channel 1 audio high and +24 VDC phantom power
Pin 5
Intercom channel 2 audio low and +24 VDC phantom power
Pin 6
Intercom channel 2 audio high and +24 VDC phantom power
2 4
Au d i o c o m ®