When
switched
into
the Diagnostic Mode
the
HL display
will
display a
code to
indicate which diagnostic
test
is being
selected.
The codes are as follows:
"DO
"
= Hardware Diagnostic Test
"D1"
=
Pushbutton Diagnostic Test
"D2
"
= Display Diagnostic Test
I'
D3
"
= A/D Diagnostic Test
"D4"
=
Attenuator Maximum Output Level Cal
The code will display for 2 seconds and then the instrument
will
initialize for the selected test.
During this time all
controls
will be disabled.
4.9.1 HARDWARE DIAGNOSTIC TEST (DO)
TEST DESCRIPTION
This
diagnostic test provides direct and independent control of
the following hardware blocks:
Oscillator Frequency
Stimulus Multiplexer
Attenuator Position
+10
dB Pad Position
Transducer Routing
Each hardware block is controlled independent of all other blocks
i.e.,
selecting an
oscillator frequency will
not
change
the
attenuator position.
TEST INITIALIZATION
When switched into the hardware diagnostic test, the
instrument
will be initialized as follows:
Tone Type = Current Selection
Frequency= Current Selection
Stimulus M
UX
= Oscillator or External input based on current
frequency knob position
Channel = OFF
Attenuator position = 255
Response LED = OFF
Stimulus On LED = OFF
Low Battery Segment = Current State
II
+
II
Segment = OFF
TONE
TYPE
SWITCH
This switch selects the Steady,
FM or Pulsed Tone type just as in
the Normal Mode.
The Steady and Pulsed Tone types will apply to
any
stimulus (internal
oscillator or external
stimulus)
being
used.
The FM Tone type will always FM the internal
oscillator,
even if the external stimulus is selected.
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