The "Reference" Calibration Procedure - RF Technology Eclipse Series Operation And Maintenance Manual

6 FIELD ALIGNMENT PROCEDURE
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.
The next request for the User should always be ignored.
The Exciter's default Modulation VCO Frequency is 320MHz
If this is correct enter <RET>
else enter the new value:
This parameter is for future use only. Please always hit the Enter key.
Then the user will be prompted for serial port baud rates, parities etc. Please leave these
parameters unchanged unless you are familiar with how to change such parameters on
your PC. The Eclipse50 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
switch momentary push-button 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.
6.4

The "Reference" Calibration Procedure

T50> cal ref
To compensate for crystal ageing and other parameters that drift, the following
procedure should be performed approximately once per year.
If your exciter is fitted with the external reference option (an extra BNC connector on
the rear panel), the user can connect an external reference directly to the rear BNC
connector. If the exciter does not have this option, then the top cover of the exciter
RF Technology T50 Page 29