NARDA 8718B - Manual (Page 18)

17 Chapter 4 Making a Measurement
Zeroing the Probe
The probe and meter must be “zeroed” together. It is important
that the probe is not exposed to radiated fields during the
zeroing process. The storage case is shielded and provides a
convenient “zero density” environment.
To zero the probe...
1. Place the probe in the storage case. Be careful not
to move the probe while zeroing takes place (on
probes with low frequency test points, you can create
static which will give inaccurate results).
2. When you are ready, press the ENTER key. The
screen will say ZEROING.
3. The meter will beep and the main measurement screen
will appear in about 15 seconds after zeroing is completed.
If you get a message that the probe could not be zeroed, the
most likely causes are:
• The probe is not connected properly. Check the
connector and retry.
• The meter is set for a fiber optic input and you are
using the standard cable input (or vice versa). Turn the
meter off. Turn the meter back on and press
(F4) (MENU) to access the menu system. Press
8 (NEXT) to get to the Second Menu Screen. Press
3 (CABLE/FO) to the probe input status. Press F1 (OK)
if it is correct or F4 to select the alternate. Then press
Esc to return to the Opening Menu Screen.
7. Proceed with the probe zeroing process.
A 8 7 2 2 D S N X X X X X
3 0 0 H - 5 0 G H z z k E - F L D
3 0 0 % S T D S H A P E D
Y E S N O M E N U
F1 F2 F3 F4
Position the probe in
the case with one
test point pointed
downward and the
other two test points
above the foam.
This will insure that
the test points are
not touching the
foam.
N
ote