DRAKE VMM 600 Інструкція з експлуатації
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THREE YEAR LIMITED WARRANTY
THREE YEAR LIMITED WARRANTY
THREE YEAR LIMITED WARRANTY
THREE YEAR LIMITED WARRANTY
THREE YEAR LIMITED WARRANTY
R.L. DRAKE COMPANY warrants to the original purchaser this product shall be free from defects in material or workmanship for three
(3) years from the date of original purchase.
During the warranty period the R.L. DRAKE COMPANY or an authorized Drake service facility will provide, free of charge, both parts
and labor necessary to correct defects in material and workmanship. At its option, R.L. DRAKE COMPANY may replace a defective
unit.
To obtain such warranty service, the original purchaser must:
(1)
(1)
(1)
(1) Retain invoice or original proof of purchase to establish the start of the warranty period.
(1)
(2)
(2)
(2)
(2) Notify the R.L. DRAKE COMPANY or the nearest authorized service facility, as soon as possible after discovery of a possible
(2)
defect, of:
(a) the model and serial number,
(b) the identity of the seller and the approximate date of purchase; and
(c) A detailed description of the problem, including details on the electrical connection to associated equipment and the list of such
equipment.
(3)
(3)
(3)
(3) Deliver the product to the R.L. DRAKE COMPANY or the nearest authorized service facility, or ship the same in its original
(3)
container or equivalent, fully insured and shipping charges prepaid.
Correct maintenance, repair, and use are necessary to obtain proper performance from this product. Therefore carefully read the
Instruction Manual. This warranty does not apply to any defect that R.L. DRAKE COMPANY determines is due to:
(1)
(1)
(1) Improper maintenance or repair, including the installation of parts or accessories that do not conform to the quality and
(1)
(1)
specifications of the original parts.
(2)
(2)
(2)
(2)
(2) Misuse, abuse, neglect or improper installation.
(3)
(3)
(3) Accidental or intentional damage.
(3)
(3)
All implied warranties, if any, including warranties of merchantability and fitness for a particular purpose, terminate three (3) years
from the date of the original purchase.
The foregoing constitutes R.L. DRAKE COMPANY'S entire obligation with respect to this product, and the original purchaser shall
have no other remedy and no claim for incidental or consequential damages, losses or expenses. 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.
SPECIFICATIONS
RF
Frequency Range:
VMM600-
54-600 MHz.
Factory set to one of the following
channels:
Cable Channels 1-86, 95-99 or
UHF-TV Channels 14-35.
VMM860-
600-864 MHz.
Factory set to one of the following
channels:
Cable Channels 87-135 or
UHF-TV Channels 36-69.
Output Level:
+45 dBmV, minimum.
Adjustable over a 12 dB range.
Output Impedance:
75 Ohms, return loss of 12 dB.
A/V Ratio:
Audio Carrier -10 to -22 dB
referenced to video carrier,
adjustable.
Frequency Stability:
+ 5 kHz (Visual Carrier).
Intercarrier Frequency:
4.5 MHz, ±50 Hz.
FCC Frequency Offsets:
All aeronautical channels are offset
positive.
Spurious Outputs:
-65 dBc, measured at -15 dB A/V
54 to 1000 MHz
ratio and with modulator output
level of +45 dBmV.
Broadband Noise:
-95 dBc, referenced to video
carrier.
(4 MHz BW and +36 MHz offset).
VIDEO
Input level for 87.5%
modulation:
1 Vp-p +3 dB, manual gain adjust
with front panel control.
Input Impedance:
75 Ohms, return loss of 18 dB
minimum.
Frequency Response:
20 Hz to 4.2 MHz, +1 dB.
Video S/N:
65 dB minimum, luminance
weighted.
WARRANTY AND SPECIFICATIONS
VIDEO (continued)
Differential Gain:
+3% (10 to 90% APL).
Differential Phase:
+3 degrees (10 to 90% APL).
C/L Delay:
Within 50 nSec. of 0 nSec.
(standard), or
FCC predistortion, (option).
AUDIO
Input Level for 25 kHz
Peak Deviation:
100 mV to 2.5 Vrms;
manual gain adjustment
with front panel control.
Input Impedance:
10 K Ohms, unbalanced.
Pre-Emphasis:
75 S. (Defeatable via
jumper setting for BTSC
baseband stereo
compatibility).
Frequency Response:
40 Hz to 15 kHz, +1.0 dB
referenced to 75 S
pre-emphasis curve.
(40 Hz-100 kHz ±0.5 dB if
pre-emphasis is defeated).
4.5 MHz Intercarrier Stability:
+50 Hz, frequency
synthesized.
Total Harmonic Distortion:
0.5% Maximum.
Hum and Noise:
-65 dB minimum, referenced
to 25 kHz peak deviation.
GENERAL
DC Power Input:
+12 VDC @ 150 to 220 mA,
channel dependent.
Operating Temperature:
+5 VDC @ 75 to 100 mA,
channel dependant.
Size:
0°C to +50°C.
Weight:
1"W x 3.5" H x 7.5"D.
11 oz.
Specifications subject to change without notice or obligation.
VMM 600/VMM 860 VIDEO MODULATOR SYSTEM
®
12 POSITION RACK MOUNT
OR
4 POSITION
VMM 600/VMM 860 MODULAR
RACK MOUNT
SINGLE-CHANNEL MODULATORS
POWER SUPPLY
The R.L. Drake VMM 600/VMM 860 Video
Modulator System is a professional quality
modular headend system designed to optimize
rack space. Up to 12 VMM 600 and/or
VMM 860 modulators can be racked alongside
a single power supply in the Drake 12 position
rack mount or up to 4 modulators can be racked
in the 4 position rack mount. Either model is a
high quality, fixed channel heterodyne audio/
video modulator.
The VMM 600 provides a modulated visual and
RF carrier output on any single VHF channel
2-13; Lowband channel A8; Midband channel
A-I and A5-A1; Superband channel J-W;
Hyperband channel AA-ZZ and AAA-XXX
(CATV 63-86) or UHF channel 14-35.
Aeronautical channels are offset positive with
a tolerance of ±5 kHz as required by FCC rules.
The VMM 860 provides a modulated visual and
RF carrier output on any single Hyperband
channel 87-135 or UHF channel 36-69.
® is a registered trademark of the R.L. Drake Company
© Copyright 2005 R.L. Drake Company
1
POWER SUPPLY
The heterodyne conversion system, in
conjunction with the use of a SAW filter,
insures optimum vestigial selectivity for
adjacent channel headends.
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 modulators accept standard (sync
negative) polarity video at a 0.7 to 2.5 Vp-p
level. All level controls are located on the front
panel for ease of operation. Output level of
+45 dBmV is typical and is adjustable from
+30 to +45 dBmV.
Field-defeatable audio pre-emphasis enables
passing of BTSC encoded standard baseband
stereo audio signals. The Drake model
MMTS20 stereo encoder may be used with the
VMM when stereo audio is required.
P/N: 3852631C-04-2005