>POWER
{ON|OFF}
For powering the amplifier ON and
OFF
>MUTE {ON|OFF}
For Muting and Unmuting the
amplifier
>MODE [TRI|TET]
For querying the mode, and
selecting Triode or Tetrode modes
>TOTLTIME
For displaying the total time the
amplifier has been powered up,
excluding standby time
>TUBETIME
[CLEAR]
For displaying powered up time
since last reset, excluding standby
time, and for clearing TUBETIME
>ACINPUT
[READ|SET]
For displaying the AC Voltage
input, and the internal AC Voltage
setting of the amplifier
>READTEMP
{F|C}
For displaying the unit temperature
in degrees Fahrenheit or Celsius
>PHASE
For querying the phase setting of
the amplifier
>PHASE ZERO
>PHASE 180
>BIASLEDS
{ON|OFF}
For unsuppressing and suppressing
the normal bias LED activity
>COUNTDN
{ON|OFF}
For muting the power up
countdown
>TUBEFLT
[CLEAR]
For querying tube fault status, and
to clear a tube fault
>VTL
Returns factory contact info
Contact VTL:
Email:
Tel. 909-627-5944
Fax. 909-627-6988
>VERSION
Returns the version number of the
main display software.
>VIEWERR
Displays the last 16 stored error
messages, starting with the most
You can send the
>VIEWERR command
S-400 Amplifier Owner’s Manual
VTL
31