Castle group KA018 Operating Manual page 13

P DX S F DAT R
RO ETUP OR
The Pro DX Sound Level Meter can be set so that once a certain sound level
has been reached the DAT machine will start recording.
Once the sound level falls below this level the DAT machine will then stop re-
cording.
To set this level and to enable the DAT option press the menu key on your Pro
DX Meter until the Main Menu is displayed.
Select option 2 'General Setup' by pressing key 2.
Select option 4 'DAT Recorder' by pressing key 4.
Select option 1 'DAT activated' by pressing key 1.
Press the Light Blue Arrow key directly underneath TOGGLE displayed on the
screen. This will toggle the DAT to be either ON or OFF. (Note YES = ON).
Press the OK button to confirm the selection.
Select option 2 'DAT threshold' by pressing key 2.
Type in a number between 30 and 140 (Note that this figure needs to be less
than or equal to the top of the range you have selected. As an
you have selected the 15 to 90dB range then do not set this value to greater
than 90dB. Press the OK button once your threshold is entered.
Repeat press the Light Blue Arrow key directly underneath BACK that is
displayed on the screen to return to sound level meter operation.
The Pro DX Meter is now setup to automatically start the DAT recording at
your selected threshold level when you start the Pro DX to record. To per-
form this task press the Start / Stop key which is located to the left of the OK
button. To stop the Pro DX Meter recording simply press the Start / Stop
key again. Note that REC is displayed on the screen whilst the Pro DX Meter
is recording.
The DAT records for a minimum of 5 seconds even if the sound level has
dropped below the set threshold level. This delay is reset each time the sound
level reaches the threshold level. The purpose is to alleviate a recording that
continually starts and stops if the noise source is
set threshold level.
DAT
ECORDING
example if
fluctuating around the
12
DAT R T
EFERENCE
To ensure validity of the recorded data it is necessary to record a reference
tone on the tape each time your KA018 kit is used.
Follow the procedure below to perform this task:
Firstly ensure that your microphone preamplifier is plugged into your
microphone extension cable, then plug the microphone extension cable into
the socket labelled 'microphone' on the KA018 case.
TAKE EXTREME CARE WHILST HANDLING YOUR MICROPHONE, IT IS
AN EXTREMELY SENSITIVE DEVICE AND VERY COSTLY
Ensure that your Pro DX Meter and the DAT are ON. (If the DAT machine is
currently OFF it can be powered by pressing the STOP key)
If you have not yet set the DAT clock, do so now as indicated on page 8 of
this manual.
Ensure the range 45 – 120 is selected on your Pro DX Meter, this is
achieved by pressing the Light Blue Arrow key directly underneath RANGE
on the screen until the desired range is selected. (If RANGE is not visible
then repeat press menu until it is)
Confirm that the 3.5mm jack plug is connected to the DAT Line Input socket
and then press the REC / ID WRITE key on the DAT machine.
Carefully and gently push a Castle GA607 calibrator over the microphone. A
small amount of resistance should be felt
calibrator forms a seal around the microphone.
Ensure the calibrator is set to 94dB. (Note that the calibrator automatically
turns OFF after approximately 1 minute)
Set the REC MODE to manual on the DAT machine and then adjust the dial
on the DAT machine labelled REC LEVEL until the both the left and right
channels read –24dB (minus 24dB) on the bar graph. i.e. until the bar
graph display is located directly above the number 24.
Switch the calibrator to 94dB again to reset its timer to give another
minutes operation. Press PAUSE on the DAT machine twice to start
recording the reference tone for future playback and analysis purposes.
DAT
ONE
as the o-ring seal on the
9