Diagnostic Mode Function Controls - Welch Allyn Grason-Stadler GSI 17 Series Service Manual

DIAGNOSTIC MODE FUNCTION CONTROLS

Function controls for
Power Switch
F2 - L/R Routing Switch
F3 - Tone Type Switch
F4 - HL Knob
F5 - +10 dB Range Extender
F6 - Present Bar
F6A - Stimulus on LED
F7 - Response Switch LED
F8 - Frequency Selector
NOTE: Refer to Calibration Mode for more in-depth description of
control functions (Cal/Norm Switch, Dip Switches, etc).
the Diagnostic Mode DO are as follows:
Same as Normal Operating Mode -
active at all times.
This 3 position switch is active at
all times in the Diagnostic Mode.
Left Position - Output is not routed
to
amplifiers are disabled.
Right Position - Output is routed to
the left amplifier.
Center Position - Output is routed
to the right amplifier.
Same as Normal Operating Mode -
active at all times.
The HL knob is used to control the
DAC
indicates the current DAC level.
The DAC level range of 0 to 255
along with the +10 dB range extender
allows the operator to check the
full range of the attenuator.
voltages in the troubleshooting
section will be referenced to a
specific DAC level.
Active at all times
ON/Push OFF selection allows the
operator to change the state of the
10 dB range extender.
of LCD indicates the Range Extender
is active.
Active
ON/Push OFF selection allows the
operator to turn the channel OFF and
ON.
accomplished using the attenuator.
It is important to note that the
latch is updated continuously when
the Present Bar is ON otherwise the
latch is updated only when the tone
is presented.
Same as Normal Operating Mode -
indicates ON or OFF state of the
Present Bar.
In
handswitch is used to ENABLE/DISABLE
the
beneficial when measuring signal to
noise.
of the Tone Oscillator.
Active at all times - same as Normal
Mode.
a m p l i f i e r .
either
level while the
at all times
The channel
the Diagnostic
Tone Oscillator.
The LED indicates the status
B o t h
display
All
this Push
(+) indicator
this Push
OFF/ON is
Mode the
This is