Anritsu S113C Guide de l'utilisateur télécharger pdf (Page 53)

Step 3. Press the REF LEVEL soft key and use the up/down arrow key or directly enter

the desired reference level from the keypad. Press ENTER to set the amplitude

level.

Step 4. Press the

SCALE soft key and use the up/down arrow key or directly enter the

desired scale from the keypad. Press ENTER to set the scale.

NOTE: Press the ATTEN soft key and select AUTO coupling of the attenuator

setting and the reference level to help insure that harmonics and spurs are not

introduced into the measurements. See Attenuator Functions (page ) for more

information.

Selecting Bandwidth Parameters

Both resolution bandwidth (RBW) and video bandwidth (VBW) can be automatically or

manually coupled. Auto coupling of the RBW links the RBW to the span. That is, the wider

the span, the wider the RBW. Auto coupling is indicated on the display as

RBW XXX. When

the RBW is manually coupled, it can be adjusted independently of the span. Manual RBW

coupling is indicated on the display as

RBW* XXX.

Auto coupling of the VBW links the VBW to the RBW. That is, the wider the RBW, the

wider the VBW. Auto coupling is indicated on the display as “VBW XXX”. When the

VBW is manually coupled, it can be adjusted independently of the RBW. Manual VBW

coupling is indicated on the display as “VBW* XXX”.

Step 1.

Press the BW/SWEEP key to display the bandwidth menu.

Step 2. To select the resolution bandwidth, press the

RBW soft key.

Step 3. Press

AUTO for automatic resolution bandwidth selection, or press MANUAL and

use the Up/Down arrow key to select the resolution bandwidth. Press ENTER to

set the resolution bandwidth. Press the

BACK soft key to return to the bandwidth

Step 4. To select the video bandwidth, press the

VBW soft key.

Step 5. Press

AUTO for automatic video bandwidth selection, or press MANUAL and use

the Up/Down arrow key to select the video bandwidth. Press ENTER to set the

video bandwidth.

Selecting Sweep Parameters

Max Hold

To toggle maximum hold ON or OFF, press the

MAX HOLD soft key. Maximum hold dis

plays the maximum response of the input signal over multiple sweeps.

Detection Method

Each display point represents some number of measurements combined by a detection

method. The number of measurements per display point is affected by the span and the res

olution bandwidth. The three available detection methods are Positive Peak, Average, and

Negative Peak. Positive peak display the maximum value of all the measurements associ

ated with that display point. Average detection displays the mean of all the measurements

associated with that display point. Negative peak displays the minimum value of all the

measurements associated with that display point.

3-10

Chapter 3 Getting Started

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Anritsu S113C Guide de l'utilisateur Page 53

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