KB-702

Technical Specifications

Headset Microphone Input
Input Type: Dynamic
Input Impedance: >= 1KΩ
Mic Limiter Threshold: -2dBu ± 3dB
Mic Limiter Range: >= 15dB

Program Line Input
Maximum Level before Clipping: >= 20dBu
Input Impedance: >= 5KΩ

Headset Output
Load Impedance: >= 8Ω
Output Impedance: <= 25Ω
Output Limiter Threshold: +5dBu ± 3dB
Maximum Output Level before Distortion: >= 17dBu

Speaker Output
Load Impedance: >= 4Ω
Max Output Level before 1% Distortion: 20dBu ± 2dBu

Party-line Output
Off Noise: < -74dBu
Output Impedance: >10KΩ

Party-line Input
Crosstalk: < -60dB
Max level before Clipping : >= 12dBu

Frequency Response
Headset Mic – Party-line: 300 – 15KHz ± 3dB
Program Input – Headset Out: 200 – 18KHz ± 3dB
Program Input – Speaker Out: 200 – 18KHz ± 3dB
Party-line – Headset Out: 200 – 18KHz ± 3dB
Party-line – Speaker Out: 200 – 18KHz ± 3dB

Max Distortion
Headset Mic – Party-line: <= 0.5%
Program Input – Headset Out: <= 0.2%
Program Input – Speaker Out: <= 0.5%
Party-line – Headset Out: <= 0.2%
Party-line – Speaker Out: <= 0.5%

Noise
Headset Mic – Party-line: < -70dBu
Program Input – Headset Out: < -60dBu
Program Input – Speaker Out: < -60dBu
Party-line – Headset Out: < -50dBu
Party-line – Speaker Out: < -50dBu

Max Gain
Headset Mic – Party-line: 41dB ± 2dB
Program Input – Headset Out: >= 18dB
Program Input – Speaker Out: >= 24dB
Party-line – Headset Out: >= 34dB
Party-line – Speaker Out: >= 40dB

Power
Input Voltage Range: 20-30 VDC
Input Current (Idle): <= 90mA
Input Current (Max): <=110mA

Internal Adjustments and Connections
Intercom: Line Five terminal connector
Program Input: Three terminal connector
Option Switches: Three DIP switches
Call Signal Jumper3: Three sets of options jumpers
Call Alert Tone Level Control: Level adjustment control

Front Panel Connectors
Panel Mic (KB-702GM only): (1) 1/4 in. (0.64 cm) panel mounting jack
Headset: (1) XLR-4M

Front Panel Controls & Indicators
(1) Program monitor level control
(1) Sidetone null control
(1) Talk button
(1) Call button
(1) Speaker ON-OFF switch
(1) Channel select switch
(1) Speaker volume control

Environmental
32 – 122˚F (0 – 50˚C)

Dimensions
8.25 in. W x 4.5 in. H x 1.75 in. D
(210 mm x 114 mm x 44 mm)

Weight
0.99 lbs. (0.45 Kg)

Product Spares List

KB-702