Palstar ZM-30, Руководство пользователя

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Debug Mode
Enabling the Debug mode sends raw
measurment data out the serial port which,
when the instrument is connected to the the
serial port of a PC, can provide diagnostic
information about the ZM-30 operation in
the field. (Default setting is OFF.)
Calibrate Reflectometer
Entering this function instructs the operator
to follows a sequence of steps that result in
new calibration data being stored on the
unit. This is a useful function to be
performed in the field when a new software
program is loaded, necessitating a
recalibration. (For additional detail on
Instrument Calibration, please refer to
Appendix E.)
Calibrate Frequency
This feature allows you to adjust the internal
DDS reference clock. When properly
calibrated, the frequency dial will indicate
very accurately the frequency being
generated by the ZM-30. The unit’s
frequency is set to 10,000.00 kHz and the
dial is used to vary an internal calibration
factor that moves the actual frequency
up/down in 1-Hz increments. Thus when
the signal being generated by the ZM-30 is
read by a high-quality frequency counter, or
when the signal is zero-beat against WWV
(for example), you can adjust the generated
signal to be as accurate as possible
compared to the reference. Once the best
setting is achieved, pressing the Dial will
save the frequency correction factor to
nonvolatile memory and the ZM-30
frequency display will forevermore reflect
that same accuracy throughout its
operational range.
Update Software
This function is used when upgrading the
ZM-30 software in the field. Whenever
newer or improved capability software is
available, the user may download the binary
file from the PalStar website to his local PC.
(For additional detail on upgrading ZM-30
software programs in the field, see
Appendix D.)
3) Additional Features
Save Settings
(Press-Hold Dial)
This is a way for you to save all
customizable settings to nonvolatile memory
such that the unit comes on next time with
everything set the exact way it was before
power-off, including the last-used frequency
on the dial. Here's how it works: At any
time in the normal impedance display of
frequency (SWR, R and X) if you press-and-
hold the Dial pushbutton steady for about 5
seconds without moving it, a message will
pop up saying "Saving Settings" and the
LED will come on. When it turns off, the
unit returns to normal operation. At
subsequent power-ups, the unit will have the
same settings previously in use for: dial
frequency and cursor position, tone, band,
mode, backlight, backlight timer, power-
down timer and data mode.