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Kramer Electronics, Ltd. 

LINE AMPLIFIERS 

This section  describes all the controls and connections of your line amplifier. Understanding the controls and 

connections helps you realize the full power of your line amplifier. 

5.1  Getting to Know Your VM-9S Amplifier 

The KRAMER 

VM-9S

 Video/Audio Line  Amplifier is a high quality amplifier which  compensates for  video 

and audio  signal losses  when long cables are  used. In any  video/audio  setup requiring  considerable  distances 

between video/audio source and acceptors, signal loss and thus depreciation in the quality of both picture and 

sound is a real problem. To prevent this phenomenon, a 

VM-9S

 amplifier is installed adjacent to the video/audio 

source. The line amplifier  may  also  be  used as a 1:2  video/stereo audio (compensated)  distributor.  Front/rear 

panel features of the 

VM-9S

 are described in Figure 1 and Table 1. 

NOTE 

For operation instructions refer to section 9. 

 

 

 

Figure 1: VM-9S Front/Rear Panel Features 

Table 1: VM-9S Front/Rear Panel Features 

No. 

Feature 

Function 

1.    Illuminated 

POWER

 Switch 

Supplies power to the unit. 

2.   

Audio Level 

knob

 

Controls audio

 l

evel of the outputs. 

3.   

Video

 

Level 

knob

 

Controls video level of the outputs. 

4.   

HF

 

Level 

knob

 

Controls cable equalization of the video outputs. 

5.   

75

 

ohm/HI-z

 switch 

Selects "

75

ohm" or "

 Hi-Z "

 impedance (for looping select 

Hi-Z

). 

6.   

In

 BNC connector 

Video input. 

7.   

Loop

 BNC connector 

Provides video looping capability. 

8.   

Video

 

Outputs 1-2

 BNC 

connectors 

2 amplified and buffered video outputs. 

9.   

In

 RCA connectors 

(R, L)

 

Audio input. 

10.   

Loop

 RCA connectors 

(R, L)

 

Provides audio looping capability. 

11.   

Audio Outputs 1-2 

RCA 

connectors

 (R, L) 

2 amplified and buffered audio

 

outputs. 

12.    Power Connector 

A 3-prong AC connector allows power to be supplied to the unit. 

Directly underneath this connector, a fuse holder houses the 

appropriate fuse. 

 

Содержание TOOLS 103YC

Страница 1: ...R ELECTRONICS LTD Kramer Electronics Ltd USER MANUAL Line Amplifiers Models VM 9S VM 9YC and Kramer Tools Models 103YC 104L IMPORTANT Before proceeding please read paragraph entitled Unpacking and Con...

Страница 2: ...ng VM 9S VM 9YC only 8 C Phase Control VM 9YC only C Gain Control VM 9YC 103YC only HF EQUALIZATION Control VM 9S 103YC 104L only Y GAIN Control VM 9YC 103YC only Audio Level Control VM 9S only Video...

Страница 3: ...one carrying the black and white and the sync information Luminance or Y and the other carrying the color information Chrominance or C signal handling is more complicated The Luminance channel may be...

Страница 4: ...B 80dB 76dB Video Bandwidth 84MHz 3dB Y 320MHz 3dB Y 430MHz 3dB 420MHz 3dB Audio Bandwidth 25kHz 1dB NA NA NA Differential Gain 0 2 0 07 0 03 0 16 Differential Phase 0 5Deg 0 05Deg 0 03Deg 0 08Deg K F...

Страница 5: ...Used for looping purposes and splits the incoming signal to enable connection of an additional machine Termination Plug Used to terminate the line to 75ohm for proper matching VS 5x4 5x4 Video Stereo...

Страница 6: ...res of the VM 9S are described in Figure 1 and Table 1 NOTE For operation instructions refer to section 9 Figure 1 VM 9S Front Rear Panel Features Table 1 VM 9S Front Rear Panel Features No Feature Fu...

Страница 7: ...side occupying only 1U in a 19 rack Front Rear panel features of the VM 9YC are described in Figure 2 and Table 2 NOTE For operation instructions refer to section 9 Figure 2 VM 9YC Front Rear Panel Fe...

Страница 8: ...cal applications A 12VDC power supply is provided for typical operation but the optional 50P can power up to six Kramer devices requiring 12VDC The 103YC is part of the Kramer Tools family of compact...

Страница 9: ...in the most critical applications A 12V power supply is provided for typical operation but the optional 50P can power up to six Kramer devices requiring 12VDC The 104L is part of the Kramer Tools fam...

Страница 10: ...LINE AMPLIFIERS As a basic rule line amplifiers should be installed as close as possible to the source to achieve the best results If the amplifier is located close to the acceptor then it also amplif...

Страница 11: ...e mainly a result of stray capacitance and inductance which occur in long cables The longer the cables or higher the frequencies used the worse the problem becomes resulting in fine detail loss as wel...

Страница 12: ...he output of the video source to the inputs of a line amplifier VM 9S in the example Always locate the line amplifier as close as possible to the video source 2 Connect the output of the line amplifie...

Страница 13: ...ing 1 Confirm that the rocker switch is in the ON position and that the indicator lamp is illuminated 2 Confirm that power connections are secured at the amplifier and at the receptacle Make sure the...

Страница 14: ...difference through any available interconnection including your cables WARNING Do not disconnect the ground from any piece of equipment in your signal path Check the following to remove hum bars 1 Con...

Страница 15: ...w instructions supplied with the product c Repair or attempted repair by anyone not authorized by Kramer d Any shipment of the product claims must be presented to the carrier e Removal or installation...

Страница 16: ...legal rights and you may also have other rights which vary from place to place NOTE All products returned to Kramer for service must have prior approval This may be obtained from your dealer NOTICE T...

Страница 17: ...m P N 2900 001006 REV 2 For the latest information on our products and a list of Kramer distributors visit our Web site www kramerelectronics com Updates to this user manual may be found at http www k...

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