User manual DRAKE DIGITAL VMM860AG

[. . . ] 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. POWER SUPPLY MODULATOR AUDIO POWER SUPPLY MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO VMM806AG VIDEO MODULATOR AUDIO MODULATOR AUDIO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO POWER PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR ERROR AUDIO A/V VIDEO PWR A/V PWR A/V # CH RF # CH RF # CH RF # CH RF # CH RF # CH RF # CH RF # CH RF # CH # 2 RF CATV CATV +100 BC TV # CH RF RF 5 CH A /V RF 4 POSITION RACK MOUNT OR VMM860AG and other compatible modular units POWER SUPPLY AUDIO AUDIO VIDEO VIDEO AUDIO AUDIO POWER ERROR POWER ERROR VIDEO VMM806AG VMM806AG VMM806AG VMM806AG VIDEO POWER ERROR POWER ERROR BC TV BC TV BC TV 5 A/V 5 A/V 5 A/V 5 BC TV A/V RF RF RF CATV CATV CATV CATV +100 CATV +100 CATV +100 CATV 2 2 2 2 The VMM860AG modulator is a member of the R. L. Drake 19" Mini-Rack Series, a professional quality modular headend system designed to optimize rack space. [. . . ] A flashing condition indicates an invalid channel setting or other conditions that would cause the unit to operate on an invalid channel. F2 - AUDIO Level Control The setting of this screwdriver adjustment determines the aural carrier deviation. F3 - VIDEO Level Control The setting of this screwdriver adjustment determines the video modulation level. F4 - Channel Number Switch Sets the desired operating channel for standard CATV channels 02 through 135 or Broadcast TV channels 02 through 69. See also Item F5 which sets the type of channel (CATV or Broadcast TV) and sets the leading "1" for CATV channels 100 through 135. CAUTION: USE AN INSULATED SCREWDRIVER BLADE WHEN ADJUSTING THE AUDIO, VIDEO, A/V, OR RF ADJUSTMENTS. THIS WILL PREVENT THE POSSIBILITY OF SHORTING CIRCUITRY TO THE FRONT PANEL IN THE EVENT THAT THE SCREWDRIVER SLIPS OUT OF THE SLOT IN THE PLASTIC SHAFT OF THE POTENTIOMETER. F5 - Mode Switch Sets the type of channel, CATV or Broadcast TV ("BC TV"). The first position of the switch ("+100") sets a leading "1" for CATV channels 100 through 135. For example: Setting for CATV channel "125"For example: Setting for CATV channel "25"- RF Frequency Range: 54 to 864 MHz; Standard, HRC, or IRC CATV channels 2 to 135, Broadcast TV channels 2 to 69. FCC Frequency Offsets: Automatic (+12. 5 kHz, +25 kHz, or none as required for each channel). A/V Ratio: Audio carrier level, adjustable from -22 to -12 dB referenced to video carrier level. Frequency Stability: Within ±5 kHz Intercarrier Frequency: 4. 5 MHz Spurious Outputs (5 MHz to 1 GHz): -60 dBc, measured at -15 dB A/V ratio and with modulator output level of +45 dBmV. normal, defeatable (flat) by rear panel switch for BTSC baseband stereo compatibility. Frequency Response: 40 Hz to 15 kHz, ±1. 0 dB referenced to 75 µSec. GENERAL DC Power Input: +12 V ±5% at 200 mA +5 V ±5% at 350 mA Operating Temperature: 00 C to +500 C ambient. (0. 3 Kg). 2 CATV CATV +100 5 BC TV 2 CATV CATV +100 5 BC TV F6 - A/V Ratio Control This screwdriver adjustment varies the level of the aural carrier over a range from 12 to 22 dB below the visual carrier. The aural carrier should be adjusted to approximately 15 dB below the visual carrier (normal operation). F7 - 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 +45 dBmV output level . Specifications subject to change without notice or obligation. 6 BROADCAST TV CHANNEL OUTPUT FREQUENCIES CATV CATV BC TV CATV +100 BC TV CATV +100 REAR PANEL CONNECTIONS / INTERNAL JUMPERS R1 3 TABLE 2: BC TV VHF BROADCAST CHANNELS Channel Number 2 3 4 5 6 7 8 9 10 11 12 13 UHF BROADCAST CHANNELS Channel Number Visual Carrier Frequency (MHz) 471. 25 477. 25 483. 24 489. 25 495. 25 501. 25 507. 25 513. 25 519. 25 525. 25 531. 25 537. 25 543. 25 549. 25 555. 25 561. 25 567. 25 573. 25 579. 25 585. 25 591. 25 597. 25 603. 25 609. 25 615. 25 621. 25 627. 25 633. 25 639. 25 645. 25 651. 25 657. 25 663. 25 669. 25 675. 25 681. 25 687. 25 693. 25 699. 25 705. 25 711. 25 717. 25 723. 25 729. 25 735. 25 741. 25 747. 25 753. 25 759. 25 765. 25 771. 25 777. 25 783. 25 789. 25 795. 25 801. 25 Visual Carrier Frequency (MHz) 55. 25 61. 25 67. 25 77. 25 83. 25 175. 25 181. 25 187. 25 193. 25 199. 25 205. 25 211. 25 R2 VIDEO INPUT FLAT NORM R5 AUDIO INPUT 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 R3 +5V +12V GND DC INPUT R4 RF OUT Figure 2 R1 - VIDEO INPUT Connector This is the nominal 1 Vp-p baseband video input to the modulator. [. . . ] The modulator outputs should be checked periodically with a spectrum analyzer to AUDIO INPUTS AC POWER CORD VIDEO INPUTS maintain a ±1 dB variation of adjacent channel carriers. The output `RF' and `A/V (Ratio)' controls are used respectively to make these adjustments. RACK MOUNTING Adequate ventilation is very important in multi-channel installations. Therefore, new 12 position rack installations with multiple VMM860AG modulators (up to 12) must use the Drake PSM121 (or equivalent) high capacity power supply module. [. . . ]