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Printed in U.S.A.  Copyright © 2001, Jensen Transformers, Inc.

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Section 1 - Introduction

The Jensen JT-MS-8N2 provides 8 channels of extremely high quality 2 way microphone

splitting with 48 Volt phantom power individually selectable on each channel. This functionality is
provided in a compact 11.35"W x 4.75"H x 2.25"D package allowing 7 units (56 channels) to be
mounted vertically on a 7U size rack panel (see Figure 2.4.1). Excellent frequency response and
extremely low distortion are provided by the Jensen JT-MB-CPC microphone splitting transformers
that are used in the JT-MS-8N2.

Features:

8 Channels of Microphone Splitting/Isolation

Removable Screw Terminal I/O Connectors

Input, Direct Output and 1 Isolated Output per Channel

Individual Faraday Shields on All Inputs and Outputs for Maximum Noise Immunity

Ground Lift Switches Provided for Input and Output

Switchable Phantom Power Circuitry Provided on all Channels

Typical Distortion of only 0.001% at 1kHz

Extremely Wide 0.8Hz to 100kHz Bandwidth

Compact Form Factor Allows High Packaging Density

Rugged Steel Frame and 0.093" PCB Provide Added Durability

Summary of Contents for Iso-Max JT-MS-8N2

Page 1: ...JT MS 8N2 8 Channel 2 Way Microphone Splitter with Phantom Power Circuitry USER MANUAL Revision 1 0 ...

Page 2: ...tions 5 2 3 Input and Output Wiring 2 3 1 Input Wiring 6 2 3 2 Output Wiring 6 Figure 2 3 Component Layout 6 2 4 Mounting 2 4 1 Rack Panel Mounting 7 2 4 2 Bulkhead Panel Mounting 7 Figure 2 4 1 Rack Panel Drilling Guides 7 Section 3 Specifications and Physical Dimensions 3 1 Electrical Specifications 3 1 1 Frequency Response 8 3 1 2 Level Handling and Distortion 8 3 1 3 Input Impedance 8 3 1 4 Lo...

Page 3: ...remely low distortion are provided by the Jensen JT MB CPC microphone splitting transformers that are used in the JT MS 8N2 Features 8 Channels of Microphone Splitting Isolation Removable Screw Terminal I O Connectors Input Direct Output and 1 Isolated Output per Channel Individual Faraday Shields on All Inputs and Outputs for Maximum Noise Immunity Ground Lift Switches Provided for Input and Outp...

Page 4: ...nel 1 resistors are numbered R11 R12 R17 and channel 3 capacitors are numbered C31 C32 and C33 2 1 2 Input Output Connections The JT MS 8N2 is based upon the Jensen JT MB CPC microphone splitter transformer which has a Faraday shielded input winding and one Faraday shielded output winding Connections for the input winding and a parallel through connection are provided on connector J11 Connections ...

Page 5: ...fault position of S1 5 is OFF to simulate a floating microphone at the isolated output 2 2 Power and Ground Wiring 2 2 1 Chassis and Groundplane Connections The JT MS 8N2 incorporates a groundplane on the top component side of the printed circuit board to provide a very low impedance for the individual input and output ground dipswitch connections This groundplane is normally connected to the stee...

Page 6: ...oint 2 3 Input and Output Wiring In order to avoid wiring confusion the HI LO and SHIELD connections are arranged in the same order for each of the INPUT THRU and OUTPUT connector positions 2 3 1 Input Wiring INPUT and THRU connections are provided on pins 1 through 6 of J11 INPUT HI LO and Shield connections are on pins 1 2 and 3 respectively THRU HI LO and Shield connections are on pins 4 5 and ...

Page 7: ...3 for mounting to standard 19 rack panels A single JT MS 8N2 unit may be mounted horizontally to a 2U rack panel Up to seven JT MS 8N3 units may be mounted vertically to a 7U rack panel See Figure 2 4 1 for 2U and 7U rack panel drilling guides 2 4 2 Bulkhead Panel Mounting Four 0 172 diameter mounting holes are provided along the bottom mounting flange and along the top edge of the JT MS 8N2 for m...

Page 8: ... THD 10dBu 2 449V Total Harmonic Distortion at 20Hz and 20dBu typical 0 035 Total Harmonic Distortion at 1kHz and 20dBu typical 0 001 3 1 3 Input Impedance Input Impedance with no preamp load 3 10k Ohms Input Impedance with 1500 Ohm preamp load 1 08 Ohms 3 1 4 Losses Output with 1500 Ohm preamp load referenced to Input 0 82dB 3 1 5 Common Mode Rejection Ratio 60Hz CMRR 120dB 3kHz CMRR 90dB 3 1 6 P...

Page 9: ...ions Length 11 35 Inches 288 3 mm Width 4 75 Inches 120 6 mm Height 2 25 Inches 57 1 mm 3 2 2 Weight Net Weight Including all 26 Plug in Connectors and Mtg Screws 3 50 lb 1 70 kg Shipping Weight 4 5 lb 2 1 kg 3 2 3 Temperature Range and Humidity Operation or Storage Temperature 32E to 158E Fahrenheit 0E to 70ECentigrade Humidity 10 to 90 non condensing ...

Page 10: ...of implied warranties if any is limited to 12 months If a problem develops with this product during the warranty period call or write us before attempting any repair We can help you identify specific problems and possibly solve the problem before the unit is returned to us for repair or replacement In any case DO NOT RETURN THE UNIT WITHOUT AUTHORIZATION and instructions from us Jensen cannot be r...

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