Marti Electronics SRPT-30 User Manual page 27

plugged into the MONITOR jack to aid in arriving at the proper gain adjustment. In high noise environments, close-
talk the microphone and reduce MIC gain until a maximum of -2 VU gain-reduction is indicated.
4. Once the proper gain level is determined, it will not be necessary to change it for that particular microphone or tape
player. The broadcast quality compressor/limited built into the unit will maintain modulation at the maximum level
while preventing over-modulation.
HIGH TEMP LED
When the internal controller detects a PA temperature between 85 and 100 degrees C, the HIGH TEMP LED will
flash red at a rate of once per second.
When the internal controller detects a PA temperature of greater than 100 degrees C, the RF output power will
completely shutdown, and the HIGH TEMP LED will flash red at a rate of twice a second. The RF output power will
stay shutdown until the PA temperature has dropped below 85 degrees C. When the internal controller detects that the
PA temperature is below 85 degrees C, it will turn off the HIGH TEMP LED and then enable the PA to transmit power.
A HIGH TEMP alarm could be due to the fan malfunctioning, the SRPT-30/40A placed in a closed-in area with
limited air circulation, or an experience of high VSWR.
HIGH VSWR LED
When the internal controller detects a VSWR of greater than 2 but less than 4, the HIGH VSWR LED will flash red
at a rate of once per second.
When the internal controller detects a VSWR of greater than 4 but less than 6, the output power will limit to a
maximum of half the rated power (that was set using the MAX PWR pot (R74) located on the synthesizer – see TUNE-
UP and ADJUSTMENTS section) and the HIGH VSWR LED will flash red at a rate of twice per second. When the
detected VSWR falls less than 4, the output will resume to it's previous power setting, the HIGH VSWR LED will flash
at a rate of once per second if VSWR greater than 2, and will turn off if VSWR is less than 2.
When the internal controller detects a VSWR of greater than 6, or detects a reverse power of greater that one-third
the maximum rated output power, the output power will immediately shut off, the TRANSMIT LED will flash red, and
the HIGH VSWR LED will flash rapidly. Every three seconds the controller will attempt to turn on the transmit output
but will again shut down if the conditions have not changed. If this occurs, even if the operator turns off the TRANSMIT
switch, the HIGH VSWR LED will still flash rapidly. The only way to stop the HIGH VSWR LED from flashing, is to
repair the output (i.e., loose connection of output, wrong connector type, wrong cable, faulty antenna, short circuit cable,
etc...), and then turn the TRANSMIT switch on (if it was off), and after 3 seconds if the controller does not detect a very
high VSWR or high reverse power, the transmit output power will come on.
METER and METER SELECT Knob
When the METER SELECT Knob is either in the FORWARD POWER or REVERSE POWER position, the
corresponding measurement can be read off of the top "WATTS" scale of the METER.
When the METER SELECT knob is either in the PA CURRENT or the B+ position, the corresponding
measurement can be read off of the middle "VOLTS/AMPS" scale of the METER.
When the METER SELECT knob is in the AUDIO COMPRESSION position, the corresponding measurement can
be read off of the bottom "VU" scale of the METER.
8/7/2003
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