Rohde & Schwarz SML01, Руководство по эксплуатации

Страница: 256 / 299

Test sequence R&S®SML / R&S®SMV03
1090.3123.12 10.6 E-6
Test sequence
Display and keyboard
Checking the display Switch on instrument
The basic menu appears after a few seconds
In menu item UTILITIES DISPLAY CONTRAST use the rotary
knob to change the setting value
The contrast changes from dark to light
Checking the keyboard Actuate keys and check the reaction on the display
Frequency
Frequency setting
Test setup Test setup 1, spectrum analyzer mode
Settings on R&S SML /
R&S SMV03
- UTILITIES REF OSC SOURCE EXT
- LEVEL: 0 dBm
- FREQ: Test frequencies
60 MHz, 100 MHz, 250 MHz, 600 MHz, 1000 MHz
With Ext.Divider Range: 10 MHz, 50 MHz
For R&S SML02/03 / R&S SMV03 also: 2200 MHz, 3300 MHz
Settings on the test receiver - CF = test frequency
- SPAN = 20 Hz
- Resolution bandwidth = 10 Hz
Measurement Set marker on peak and read off frequency
Setting time
Test setup Test setup 2, spectrum analyzer mode
Measurement principle The spectrum analyzer is operated as an FM demodulator. A process
controller transmits the start frequency and target frequency via the
IEC/IEEE bus. The spectrum analyzer is triggered by the positive edge
on the EOI line of the IEC/IEEE bus. If the process controller then
switches from the start frequency to the target frequency, the build-up
process appears on the spectrum analyzer screen.
Preparing the measurement Synchronize reference frequencies on R&S SML / R&S SMV03 and
analyzer.
Establish IEC/IEEE bus and RF connections
Connect trigger port to EOI line (pin 5) of IEC/IEEE bus.
Settings on R&S SML / R&S SMV03
- Frequency: Start frequency unmodulated
- Level: 0 dBm
Settings on spectrum analyzer
- Reference level 0 dBm,