DRAKE DAR8642 Hızlı Kılavuz - Sayfa 3

Amplifikatör DRAKE DAR8642 için çevrimiçi göz atın veya pdf Hızlı Kılavuz indirin. DRAKE DAR8642 4 sayfaları. Rack mount distribution amplifiers, with power doubled hybrid output
Ayrıca DRAKE DAR8642 için: Hızlı Kılavuz (4 sayfalar)

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INSTALLATION
1) Unpack the distribution amplifier.
2) Mount the amplifier in the desired location in the rack. Be
sure to leave at least one open rack space above and below
the amp to allow proper ventillation.
3) Connect input and output cables to the amplifier.
4) Plug the power line cord into a 115 VAC/60 Hz power
source.
5) Preset slope control fully clockwise.
6) While monitoring the output levels at the Output Monitor
-30 dB test port, adjust the Gain control for desired output at
the high end of the band. Then monitor the lowest channel
and adjust slope control to equalize this channel to the
desired level (usually equal to but not higher than the high
end of the band). Since there can be a slight interaction
between the slope and gain settings, it is advised to repeat
this step a few times to ensure the desired levels are
attained.
NOTE: The -30 dB input and output test ports can be used
to monitor input and output levels. These are only accurate
when the load is connected to the amplifier output and
power is on.
A WORD CONCERNING INPUT LEVELS
It is important to keep the input level to the amplifier within
an optimum range. If the level is too high, higher nonlinear
distortion will result and if the level becomes too low, C/N
might be less than desired. As a general rule, stay within
the optimum input level range listed in the specifications.
The listed levels assume a fully loaded channel complement.
Higher levels may be used if the channel loading is less.
In general, install a fixed input attenuator if required to set
the highest frequency channels in the input to within the
optimum range. Then set the amplifier gain to achieve the
desired output level, not to exceed the maximum output level
listed in the specifications. Then, if the low frequency
channels are above the optimum input level range, a fixed
input equalizer can be installed to drop the low frequency
channels to within this range. Use the slope control to make
fine adjustments.
INSTALLING FORWARD PATH INPUT ATTENUATOR
Remove top cover as described below. If input levels are
enough to cause a high distortion level in the input amplifier,
a fixed input attenuator may be added. Choose an SXP type
attenuator of the value required, and install at the location
indicated below. Remove the 0 dB wire jumper to allow
insertion of the attenuator.
INSTALLING AN INPUT EQUALIZER
Follow the same basic procedure as described above for the
input attenuator except that the equalizer is installed at the
equalizer location shown below:
RF INPUT OF REAR PANEL
IN
GROUND
IN
GROUND
OUT
FIXED INPUT ATTENUATOR
LOCATION
A factory installed jumper is
installed here for no
attenuation. To install an
input attenuator, remove
jumper and plug in a "SXP"
type attenuator rated for the
same or higher frequency as
the amplifier.
Installation
3
OUT
INPUT EQUALIZER
LOCATION
A factory installed jumper is
installed here for no
equalization. Install desired
"QSA" type equalizer here. If
equalizer is not used, the
jumper must be connected
between the IN and OUT
connections.