Rohde & Schwarz SML01, Руководство по эксплуатации

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Test sequence R&S®SML / R&S®SMV03
1090.3123.12 10.16 E-6
Setting time
Test setup Test setup 2, spectrum analyzer mode.
Measurement principle The test receiver is operated in spectrum analyzer mode as a fast level-
measuring instrument with a 0 Hz span. A process controller transmits
the start level and target level 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 level
to the target level, the build-up process appears on the spectrum
analyzer screen.
Preparing the measurement Synchronize reference frequencies on R&S SML / R&S SMV03 and
test receiver.
Establish IEC/IEEE bus and RF connections.
Connect trigger port to EOI line (pin 5) of IEC/IEEE bus.
Settings on spectrum analyzer:
- Center frequency = measurement frequency
- Reference level = target level + 3 dB
- Amplitude range: logarithmic, 10 dB
- Resolution bandwidth = 200 kHz
- Video bandwidth = 2 MHz
- Span = 0 Hz
- Sweep time = 100 ms
- External triggering on a positive edge with 1.4 V
Settings on R&S SML /
R&S SMV03 - FREQ:
100 MHz or user-definable
Measurement From the process controller send first the start level and then the
target level.
The level characteristic from the trigger time onward appears on
the screen of the externally triggered test receiver.
Measure the following hops:
Setting Starting level Target level Comment
CW, ATT AUTO - 140 dBm 13 dBm
With electrical attenuator, for target level only
CW, ATT AUTO 13 dBm - 54,9 dBm
With electrical attenuator
CW_ ATT FIXED - 14,9 dBm 13 dBm
Without electrical attenuator