Operations Manual

RF Technology R50 Page 19
6 FIELD ALIGNMENT (CALIBRATION) PROCEDURE
6.3 The "Miscellaneous" Calibration Procedure
R50> 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
5.7).
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 lid of the unit should be removed, and the voltage
measured. TP913 can be found just above JP12 (near the centre of the exciter).
Then the receiver 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. 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 receiver and then power it up
again. (As an alternative to power cycling the receiver, and if the cover is off the
receiver, you may simply press switch momentary push-button S200 (see 5.2).
Then the following questions are:
Is Flat frequency response on by default (Y/N)?
Is COS purely a sink of current (Y/N)?
Is COS Asserted when the Squelch is closed (Y/N)?
Is COS UnAsserted when the Squelch is open (Y/N)?
Is LOOP Asserted when the Squelch is closed (Y/N)?
Is LOOP UnAsserted when the Squelch is open (Y/N)?
Always hit "Enter key" unless the value other than default is required, note use the "Y"
key if default value need to be changed.