Invoking The Calibration Procedure; The "Miscellaneous" Calibration Procedure - RF Technology Eclipse Series Operation And Maintenance Manual

6.2

Invoking the Calibration Procedure

The T50 has in-built firmware to perform calibration. This firmware requests the user
for information as to meter readings, and/or to attach or adjust the AF signal generator.
The firmware based calibration program can be accessed from a terminal, a terminal
emulator, or the Eclipse50 terminal emulator.
As for Section 4.1, the firmware, after power up, issues the following prompt:
T50>
Via a terminal, or a terminal emulator, a user can type various commands in. The basic
command to start the calibration procedure is:
T50> cal calibration_type
Where "calibration_type" is one of:
a) misc: Miscellaneous parameters are defined and calibrated
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
g) all : (which does all the above)
6.3

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 lid of the unit should be removed, and the voltage
measured. TP913 can be found just above JP12 (near the centre of the exciter).
Page 28
6 FIELD ALIGNMENT PROCEDURE
RF Technology T50