Operating instructions

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b) dev: Maximum deviations are set (automatically forces a “cal line” and a “cal
tone”)
c) line: Line1, Line 2, Dir Aud (Tone), and microphone inputs are tested and
calibrated.
d) pwr:
The External PA attached to this unit is calibrated.
e) ref:
The reference oscillators are adjusted and calibrated
f) tone:
The maximum tone deviations are calibrated
6.2.1 The “Miscellaneous” Calibration Procedure
T50> cal misc
This procedure should not normally be invoked as part of any field maintenance.
The program will print out the Model Name and Serial Number of the exciter. If these
parameters haven’t already been defined (
e.g. at an initial calibration, at the factory, the
service personnel will be prompted to enter these values).
Then it will ask the operator to enter the value of
Vref (as measured at TP913, see 5.9).
Measure the voltage, at TP913 (Vref)
and type it on the command line...
Unless the reference diode D911 has been replaced, this should not be done. The user
should simply hit the Enter key to bypass this operation. If, though, D911 has been
replaced for some reason, then, the reference voltage can be measured either on TP913
or pin 4 of P3.
Then the exciter low battery alarm level will be asked for. If the current value is
acceptable, the User need only hit the Enter key on the keyboard. If another value is
preferred, then that value can be typed in.
For example:
The Exciter's Low Battery Alarm is 24V
If this is correct enter <RET>,
else enter the new value: 26
In this example, the low Battery Alarm level is changed to 26V.
Then the user will be prompted for serial port baud rates, parities etc. At present only
No parity and No flow control are supported. The WinTekHelp software will expect
57600 BPS, and No Parity, and No Flow Control. Note well, that if you do change any
of these, the change will not take effect until you power down the exciter and then
power it up again. (As an alternative to power cycling the exciter, and if the cover is off
the exciter, you may simply press the momentary push-button switch S200 (see 5.2).
The next thing the calibration program tests is the state of the LINE pot. The program
will ask the user to adjust this pot. If the Potentiometer is below centre, it will ask the
user to adjust it up (
i.e. adjust it clockwise). If it is above centre, it will ask the user to
adjust it down (i.e. adjust it counter clockwise). When the POT has been centred, or,
the User hits the Enter key, the program will terminate.
This last step is normally only done as part of a factory install, and it is done to ensure
that the POT is centred before being shipped to customers. For field maintenance
purposes, the step should be skipped in order to leave the LINE POT at the setting
formerly desired.
6.2.2 The “Reference” Calibration Procedure
T50> cal ref