Console House UDS 4 Mode Spezifikationen PDF herunterladen (Seite 5)

SPECIFICATIONS AE/LZB 119 1892 R1A

AUDIO INPUTS

Microphones

Supervisor and Operator Headsets Inputs for two simulated carbon telephone-style headset

microphones similar to Plantronics model HS-0309-1. Approx.

input impedance = 150 ohms. Typical input = 100 mV rms

(-12 dBm). Nominal input range = -18 to -6 dBm. ALC

controlled. DC mic bias = 3.0 ±0.5 Vdc with 50-ohm load.

Desk Mic Input for an electret-type microphone similar to part number

19C851086P10 or P11. Approx. input impedance = 600 ohms.

Typical input = 70 mV rms (-21 dBm). Nominal input range =

-27 to -15 dBm. ALC controlled. DC mic bias = 3.7 ±0.5 Vdc

with 1000-ohm load.

Boom or Gooseneck Mic Input for a dynamic microphone similar to Shure Bros. model

VR300 (part number 19C337100P1). Approx. input imped-

ance = 10K ohms. Typical input = 5 mV rms (-56 dBm).

Nominal input range = -68 to -44 dBm. ALC controlled. No dc

mic bias present.

Line 1, 2, 3 & 4 Balanced 2-wire 600-ohm inputs each designed to receive

voice bandwidth audio from one pair of a 4-wire 600-ohm

twisted-pair transmission system provided by the CEC/IMC.

Transformer isolated. Typical input = 436 mV rms (-5 dBm).

Nominal input range = -20 to +10 dBm. Ground isolation =

greater than 1500 Vdc.

Call Director Balanced 2-wire 600-ohm input designed to accept audio from

a Call Director device similar to Plant Equipment model 3780-

L1-TT-010. Transformer isolated. Typical input = 78 mV rms

(-20 dBm). Nominal input range = -26 to -14 dBm.

Paging Encoder Balanced 2-wire 600-ohm input designed to accept audio from

an external paging tone encoder or similar device. Typical

input = 436 mV rms (-5 dBm). Nominal input range = -11 to

+1 dBm. Ground isolation = greater than 1500 Vdc.

OTHER INPUTS

Microphone PTT And Monitor Switch Active-low inputs used to detect "dry-contact" switch closures

of the type found in standard microphones, footswitches and

headset jacks. (Also see * below.)

Microphone Sense Active-low inputs used to sense the connection of a

microphone. (Also see * below.)

Page PTT Active-low input used to signal presence of paging signal on

paging audio input. (Also see * below.)

* Microphone PTT, Microphone Sense, Monitor

Switch And Page PTT Active-Low Inputs

Open-circuit voltage 12 Vdc typical; 16 Vdc maximum

Short-circuit current 30 mA maximum

Filtering/Response Time Low-pass filtering prevents undesirable signals such as switch

contact bounce or static charges from triggering

microcontroller circuits; typical microcontroller response

time = input must be valid greater than 5 milliseconds

Call Director Hook Sense & Jack Sense Single-ended logic inputs used to sense CD off-hook and

handset connection status. Each internally pulled to +12 Vdc

via 470-ohm resistor.

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