Zeroing the probe – NARDA 8718B User Manual

Page 18

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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

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