User manual DRAKE DIGITAL VMD860AS

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Manual abstract: user guide DRAKE DIGITAL VMD860AS

Detailed instructions for use are in the User's Guide.

[. . . ] The modulators are designed to accept any standard audio/video source such as NTSC video and audio baseband signals from a satellite receiver, TV camera, videotape recorder, TV demodulator, or similar signal source. The VMD860AS and VMR860AS can accept stereo audio inputs and produce a BTSC stereo audio signal. When stereo audio is required, the preferred method of providing a BTSC stereo signal is to use the VMD860AS or VMR860AS model. No special setup or test equipment is required. [. . . ] The last position of the switch ("+100") sets a leading "1" for CATV channels 100 through 125. See Item (F9) for setting the channel number. Example 1: Setting for CATV channel "125"Example 2: Setting for CATV channel "25"CATV +100 CATV BCTV 2 5 T CHANNELS CATV +100 CATV BCTV CHANNEL 2 5 T CHANNELS CHANNEL F9 - CHANNEL Number Switch Sets the desired operating channel for standard CATV channels 02 through 135, "T" channels T7 through T14, or Broadcast TV channels 02 through 69. See Item (F8) which sets the type of channel (CATV or Broadcast TV) and sets the leading "1" for CATV channels 100 through 125. F10 - RF OUTPUT LEVEL This screwdriver adjustment permits decreasing the RF output level a minimum of 10 dB as the control is rotated counterclockwise. Set the control for a desired output level. ® is a registered trademark of the R. L. Drake Company © Copyright 2007 R. L. Drake LLC P/N: 3852411E-04-2007 Printed in the U. S. A. 3 REAR PANEL CONNECTIONS R1 R2 R3 R4 R5 4 SETTING THE INTERNAL JUMPERS JUMPER FUNCTIONS Refer to the INTERNAL JUMPER FUNCTIONS diagram for a brief explanation of the two jumpers used in the jumper settings. Refer to the INTERNAL JUMPER SETTINGS Diagram for proper jumper placement of the desired mode. RF OUT AUDIO IN VIDEO IN POWER LEFT RIGHT ACCESSING THE JUMPERS - First, make certain the unit is disconnected from its power source. - Next, remove the four #4 screws from each side of the top cover. - Carefully remove the top cover by lifting it upward from the chassis. The jumpers are now accessible for setting as desired. Figure 2 R1 - RF OUTPUT Connector This is the modulator output. R2 and R3 - AUDIO INPUT Connectors These "RCA" (phono) connector inputs accept baseband audio from 250 mVrms to 3 Vrms levels. NOTE: In the AG models, an internally selected jumper can defeat the audio preemphasis for use with a stereo encoder. For AG mono models, the inputs from the left and right jacks are internally summed. Input can be from a stereo source to both inputs or from a mono source to just one of the inputs. For the AS stereo models, R2 and R3 are the left and right stereo channel inputs. A mono source connected to an AS stereo unit should be input to both connectors using a "Y" cable. R4 - VIDEO INPUT Connector This is the baseband video input to the IF circuits. This input accepts baseband input levels from 0. 6 Vp-p to 1. 5 Vp-p. R5 - POWER / DC INPUT Connector This connector accepts the appropriate mating DC power cable from the supplied AC adapter. INTERNAL JUMPER FUNCTIONS Audio Pre-emphasis jumper shown in the ON position. Shown in standard configuration (no jumper). Add jumper for IRC or HRC. INSTALLATION NOTES Level adjustment provides optimum performance in multichannel installations. [. . . ] Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusions or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. This warranty shall be construed under the laws of Ohio. GENERAL DC Power Input: +10 to +18 VDC / 475 mA - from supplied AC adapter. Supplied AC Adapter: Input, 120 VAC / 60 Hz, wall adapter. [. . . ]

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