S G - 23 7 S m ar t un er ™ M anual
SGC, 13737 SE 26
th
Street Bellevue, WA 98005 USA • Ph: 425-746-6310, Fx: 425-746-6384, Email: sgc@sgcworld.com
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SGC RESERVES THE RIGHT TO CHANGE SPECIFICATIONS WITHOUT NOTICE
Copyright SGC 2008
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6.2 B.I.T.E.* LED Descriptions
*Built-In Test Equipment: Utilizing these LEDs to troubleshoot your Smartuner requires
opening the coupler case and observing the LEDs located on the PCB. Please note that doing
so will break the factory seal and may compromise the weatherproofing of your unit. If your
unit is still under warranty, it is recommended that you call SGC before opening the cover.
TND
This LED will light when the turner has found an acceptable match. It will remain lit until
conditions have changed which will cause the turner to find a different match. (i.e. A new
transmit frequency has been detected or tuner has been reset.)
L ‘Z’
This LED shows the stats of the antenna impedance. When lit, the impedance is 50 ohms or
less. When off, the impedance is greater than 50 ohms.
2:1
This LED will light when the VSWR is greater than 2:1. It will extinguish when VSWR is
less than 2:1.
PHZ
This LED indicates the presence of lack of RF power from the radio. When transmitting, the
LED will light to indicate RF is being detected. In receive, the LED should be extinguished.
OTHER
All LEDs will blink on and off at a rate of 2Hz to indicate the tuner was not able to find a
valid match.
Note that these status LEDs are usually used to aid a technician in diagnosing the status of
the system and should not be thought of as laboratory instruments.
As the Smartuner tunes, the BITE status will be continually updated from the CPU. If your
coupler’s BITE LEDs are not responding as outlined above, contact SGC for further assistance.
Additional technical information on coupler design and theory, with schematics, is available for
download from our website free of charge.
Visit
www.sgcworld.com
for more information on our full line of HF antenna couplers and
accessories.
