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DRAKE VM2551 取扱説明書
Adjustments
VIDEO LEVEL: With the intended signal source connected and a representa ve video program present turn the Video
Level Adjust control clockwise un
Alterna vely, while watching the picture on a good TV monitor, adjust the control to the highest (clockwise)
level that does NOT cause the highlights (white por
AUDIO LEVEL: Turn the Audio Level Adjust control clockwise un the Audio Overmodula
the loudest peaks of the audio program material.
OUTPUT LEVEL: The Output Level is adjusted by pressing the UP or DN bu on when in the Output Level display mode.
The LED display will blink indica g a transi on state. The output level is not changed un the ENTER
bu on is pressed. If the ENTER bu on is not pressed, the display will return to its res g state a er 30
seconds. Pressing and holding the UP or DN bu on will allow for faster scrolling. The Level increments in
0.2 dB steps. Output level accuracy is typically +/- 1 dB of display, +/- 2 dB worst case.
A/V CARRIER RATIO: To adjust the aural-to-visual carrier ra o, tune the RF indicator device to the aural carrier frequency
and adjust the Aural Carrier control to obtain the desired aural carrier level. Recommended ra
-15 dB.
EAS/ALT IF:
AUTOMATIC: Connect a jumper to the terminal strip auto posi
a +30 dBmV EAS IF signal is detected.
MANUAL: EAS is ac ve with a ground connec
the Video Overmodula
of the picture) to become "washed out".
on the manual posi
Adjustments
light just flashes, then back off slightly.
light just flashes slightly on
EAS will switch on when
of the terminal strip.
7
is