Kramer Electronics TP-1xl user manual 11.5 HF/EQ. Control, 11.6 Y/C Control, 709, 710 Only

WARNING!

1.The Twisted-Pair Interface/Kramer Tool is calibrated at the factory for transparent operation at 1 meter. Any re-tuning will upset the machine’s transparency.

2.Do not attempt to adjust the GAIN/LEVEL trimmers without using accompanying standard calibrated oscilloscope or waveform monitor!

11.5HF/EQ. Control

(TP-1xl, TP-2xl, TP-6, 704, 705, 708, 712 Only)

HF Control function enables the operator to compensate for degradation of the video signal due to too long or non-standard cables. Degradation and loss of video signal are mainly the result of stray capacitance that occurs in long cables. As longer cables are used, the problem is aggravated, resulting in fine detail loss as well as in color degradation. Hence, it is necessary to compensate for the loss by using the Twisted Pair/Kramer Tool HF/EQ. control trimmer; equalization is performed by first connecting a Color Bar Generator to a Twisted Pair Interface/Kramer Tool transmitter input. A waveform-monitor (or an Oscilloscope with 75ohm termination) is then connected to the long cable output. A known color bar signal is applied to the Twisted Pair Interface/Kramer Tool input and compared to the signal monitored at the far end. The operator adjusts the HF/EQ. trimmer until the measured output chrominance signal matches that of the input signal.

WARNING!

3.The Twisted Pair Interface/Kramer Tool is calibrated at the factory for transparent operation at 1 meter. Any re-tuning will upset machine’s transparency.

4.Do not attempt to adjust the EQ./HF trimmers without using accompanying standard calibrated oscilloscope or waveform monitor!

11.6Y/C Control

(709, 710 Only)

The Y/C system (Luminance and Chrominance) is a complex division of the video signal that is operated in systems such as S-VHS, where the Luminance signal (with the sync) and Chrominance signal (with the color burst) are transmitted separately. The result is very high quality pictures; however, to cope with the complexity of Y/C, special devices such as processors, switchers, amplifiers, etc. are needed during serious video editing. The connector used in this system is a 4-p type with two coaxial wires.

11.6.1Y Gain Control

The Y Gain (Luminance) trimmer is utilized whenever a need arises to control the Y component of the Y/C video. The operator adjusts the trimmer with an appropriate screwdriver until a satisfactory level of luminance is achieved.

11.6.2C Gain Control

The C Gain (Chrominance) trimmer is utilized whenever a need arises to control the C component of the Y/C video. The operator adjusts the trimmer with an appropriate screwdriver until a satisfactory level of chrominance is achieved.

11.6.3Y EQ. Control

All the cables leading to and from acceptors and sources should have precisely the same length. If cables’ lengths are not equal (for example, the “ Y” cable is shorter than the “ C” cable) undesirable effects such as color smear, delay problems (misregistration of the black and white content with the color) and others might appear. When small details of the picture fade or disappear or loss of sharpness and resolution occurs, gently adjust the Y EQ. trimmer until a satisfactory display is achieved. For more details concerning the effects of cables length on high frequency video signals, refer to section 11.5 "HF Control".

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KRAMER ELECTRONICS LTD.

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