Anritsu S113C Betriebsanweisung PDF herunterladen (Seite 79)

Creating a Spectral Mask

Quick go/no-go measurements can be performed by establishing test limits. When using

test limits, the user is able to quickly identify signals exceeding established limits as failing.

To aid users in establishing limits, the Anritsu Site Master features both single limit and

multiple limit functions.

Example

Step 1. Reset the Site Master to the factory default settings if a known starting state is

desired.

If the unit is off, hold down the ESC/CLEAR key while pressing the ON/OFF

key.

If the unit is already on, press the RECALL SETUP key on the data keypad.

When the key is pressed, a Recall Trace selection box appears on the display.

Select setup location 0 to recall the factory preset state.

Step 2. Connect a signal source to the Anritsu Site Master spectrum analyzer.

Step 3. Set attenuator coupling to AUTO.

Step 4. Set the Reference Level to 0 dBm.

Step 5. Set the scale to 10 dB/div.

Step 6. Set the signal source frequency to 900 MHz and the signal level to - 20 dBm.

Step 7. Set the Site Master center frequency at 900 MHz, the span to 20 MHz, resolu-

tion bandwidth to 30 kHz, and video bandwidth to 300 Hz.

Step 8.

Press LIMIT and select

MULTIPLE UPPER LIMITS using the appropriate

softkey.

Step 9. Select

SEGMENT 1 using the appropriate softkey, press EDIT and enter the start

frequency, start limit, end frequency, and end limit as prompted in the message

area. The span is ten divisions wide; therefore divide the span by 10 to deter-

mine the span per division and desired starting point.) Enter start frequency =

890 MHz, start limit = –40, end frequency = 898 MHz, end limit = –40.

Step 10. Press the

NEXT SEGMENT soft key. The starting point of segment 2 will auto-

matically be set equal to the ending point of segment 1. Press

EDIT and enter the

start frequency, start limit, end frequency, and end limit as prompted in the mes-

sage area. Enter start frequency = 898 MHz, start limit = -40, end frequency =

899 MHz, end limit = –10.

Step 11. Press the

NEXT SEGMENT soft key. The starting point of segment 3 will auto-

matically be set equal to the ending point of segment 2. Press

EDIT and enter the

start frequency, start limit, end frequency, and end limit as prompted in the mes-

sage area. Enter start frequency = 899 MHz, start limit = –10, end frequency =

901 MHz, end limit = –10.

Step 12. Press the

NEXT SEGMENT soft key. The starting point of segment 4 will auto-

matically be set equal to the ending point of segment 3. Press

EDIT and enter the

start frequency, start limit, end frequency, and end limit as prompted in the mes-

sage area. Enter start frequency = 901 MHz, start limit = –10, end frequency =

902 MHz, end limit = -40.

5-7

Chapter 5 Spectrum Analyzer Measurements

SgLabs

www.sglabs.it

email: [email protected]

tel. +39 0755149360

SgLabs

www.sglabs.it

email: [email protected]

tel. +39 0755149360

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