Table of Contents
Advertisement
The EEPROM will then be tested by reading the complete EEPROM to
a checksum which will be compared to a checksum
generate
in
the
EEPROM.
flashed on
the HL display and the initialization
continue.
Dip Switch
will be checked to determine which CAL mode is to
#3
be initialized.
calibration mode is selected, and if in the ON position, the
Custom SPL selection mode will be selected.
4.4 MODE INITIALIZATION
the
transducer
When
instrument will be initialized as follows:
Tone Type = Current selection
Frequency ,= Current selection
Channel = OFF
Calibration HL = 10 dB below the nonextended HL limit for.
the current transducer and frequency
Transducer SPL = Calibration HL + Current RTL
+10 dB Pad = Out
Transducer Routing = Current selection
HL Display = Current custom SPL level stored in EEPROM
Response LED = OFF
Stimulus On LED = OFF
Low Battery Segment = Current state
"+" Segment = OFF
4.5 EARPHONE SPL CALIBRATION MODE
This Calibration Mode is used to calibrate the SPL for each
stimulus for each transducer.
selected transducer output SPL level to the specified value
displayed on the HL display.
calibration HL level and the Reference Threshold Level (RTL) for
the current transducer and frequency.
RTL value or
standard
position of Dip Switch #3 when the Calibration Mode was entered.
The transducer
transducer and stimulus.
4.5
TONE TYPE SWITCH
.1
This
switch
operates as in the Normal Mode to select
Type of the stimulus.
4.5.2 ROUTING SWITCH
This
switch
operates as
transducer to be calibrated.
and they can be calibrated in any sequence.
If an error is found the word
If in the OFF position the transducer SPL
SPL Calibration
This SPL value is the sum of the
a custom RTL
SPL calibration data is
in the
All transducers must be
Mode is
This is done by adjusting the
The RTL may be either the
value
depending on
stored in
Normal
Mode to
stored
"CAL "
will be
process will
selected
the
the
EEPROM by
the
Tone
select
the
calibrated
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
