Front Panel Operation - Beko HLV-800-3 Instruction & Operation Manual

5. Front panel operation

POWER
After switching the "POWER"-switch the amplifier is turned on, which is indicated by the
green "ON"-LED. It takes approx. 5 seconds until the internal supply voltage rises up to 50
VDC and releases PTT operation. The HLV-800 has an integrated pfc-controlled switched
power supply with an efficiency of > 96%. The total mains power consumption @ 800 watts
into a 50 ohms load is <1.900 watts.
PREAMP
When pressing this switch to ON the integrated sequencer enables trouble free operation with
external high quality pre amplifiers confirmed by the illuminated yellow "Preamp"-LED.
This sequencer control circuit activates the RF-power unit after turning off the preamplifier
and turns the preamplifier on after switching off the RF-power unit. The supply voltage for
the use of an external preamplifier is fed to pin 4 of the "CONTROL"-jack at the rear panel.
It is short circuit protected by use of a ptc-fuse and supplies 15 volts/ 750 mA. Preamps that
can only accept voltage feed via the coaxial cable, can't be used with this amplifier.
STANDBY
If the "STANDBY"-switch is pushed, the RF-unit is turned off while keeping the amplifier
still turned on but with an RF bypass condition from input to output. This condition is
indicated by the illuminated yellow "PAOFF"-LED. While in STANDBY, the sequencer and
preamp control (If the preamp switch is ON) functions of the amplifier continue to operate
normally. When the PTT line of the amplifier is grounded, the preamp voltage will be
dropped and the AUX jack will go to ground.
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