SGC SG-500 SmartPowerCube™ User’s Manual, Page 7
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Street Bellevue, WA 98005 USA • Ph: 425-746-6310, Fx: 425-746-6384, Email: [email protected]
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SGC RESERVES THE RIGHT TO CHANGE SPECIFICATIONS WITHOUT NOTICE
Copyright SGC 2007
This barrier strip with screw terminals allows DC power and RF ground connections.
The top screw terminal is for +14 VDC
The middle screw terminal is for RF ground.
The bottom screw terminal is for DC ground (return).
Wiring Tips
The +14 VDC wiring should be #6 AWG diameter or larger, and kept as short as possible to
avoid excessive voltage drop.
The RF ground should be connected to suitable ground system. See other SGC publications for
specific antenna ground and counterpoise suggestions.
The DC ground / return should also be #6 AWG wire diameter or larger.
6.5
Status LED Description
The status LEDs indicate the various amplifier parameters and any fault conditions that may
exist. There are two vertical columns of six LEDs. The left column indicates faults and transmit
status. The right column indicates the active selected filter band. The function of the various
LED indicators are as follows:
XMT – When this indicator is on, the amplifier is keyed for transmission. Normally the LED is
on only when push-to-talk (PTT) is engaged.
CURR – Warns that over-current condition (exceeding 100 A) exists, or if the current imbalance
between amplifier modules exceeds 20%. When illuminated, the amplifier has tripped off-line.
To reset the amplifier, power down and restart the unit.
VOLT – Warns that an under-voltage condition (less than 10 VDC) exists. When illuminated, the
amplifier has tripped off-line. To reset the amplifier, power down and restart the unit.
IMPORTANT: A common cause of an under-voltage condition is that the power supply does not
have sufficient capacity for the power level or duty cycle. A larger power supply or battery-float
should be employed. Voltage ‘droop’ under high current demands will not damage the SG-500,
but may result in reduced output power.
VOLT + CURR – Invalid frequency used.
VSWR - Warns that the samples VSWR has exceeded 4:1, and the power reflected back to the
SG-500 is higher than acceptable. When illuminated, the amplifier has tripped off-line. To reset
the amplifier, power down and restart the unit.
VSWR + CURR – Input RF drive level out of range.
TEMP – Warns that an over-temperature condition (greater than 55 degrees C) exists. This LED
starts flashing at 55 degrees C, and increases in rate until it is on continuously – at which time the
amplifier trips off-line. When this occurs, the amplifier has not been damaged and may be
operated again as soon as the indicator resumes flashing. Occasional flashing of this indicator