Instructions
Table Of Contents
- Cover
- Contents
- 1 For Your Safety
- 2 Getting Started
- 3 Waveform Setup
- 3.1 Connecting Probes
- 3.2 Vertical Setup
- 3.3 Horizontal Setup
- 3.4 Acquisition Control
- 3.5 Roll Mode
- 3.6 Trigger
- 3.6.1 General Trigger Settings
- 3.6.2 Edge Trigger
- 3.6.3 Glitch Trigger
- 3.6.4 Width Trigger
- 3.6.5 Video/TV Trigger
- 3.6.6 External Trigger (R&S RTH1002)
- 3.6.7 Pattern Trigger (R&S RTH-K19)
- 3.6.8 State Trigger (R&S RTH-K19)
- 3.6.9 Runt Trigger (R&S RTH-K19)
- 3.6.10 Slew Rate Trigger (R&S RTH-K19)
- 3.6.11 Data2Clock Trigger (R&S RTH-K19)
- 3.6.12 Serial Pattern Trigger (R&S RTH-K19)
- 3.6.13 Timeout Trigger (R&S RTH-K19)
- 3.6.14 Interval Trigger (R&S RTH-K19)
- 3.6.15 Window Trigger (R&S RTH-K19)
- 3.6.16 Protocol Trigger (R&S RTH-K1, -K2, -K3, -K9 and -K10)
- 4 Waveform Analysis
- 5 Mask Testing
- 6 Spectrum Analysis
- 6.1 FFT Mode
- 6.2 Spectrum Mode (Option R&S RTH-K18)
- 6.3 Harmonics Measurement (Option R&S RTH-K34)
- 7 Multimeter Measurements
- 8 Data Logging
- 9 Protocol Analysis
- 10 Logic Analyzer (R&S RTH-B1 MSO)
- 11 Frequency Counter (R&S RTH-K33)
- 12 Documenting Results
- 13 General Instrument Setup
- 14 Network Connections
- 15 Remote Control Commands
- 15.1 Conventions used in Command Description
- 15.2 Mode
- 15.3 Waveform Setup
- 15.3.1 Automatic Setup
- 15.3.2 Vertical Setup
- 15.3.3 Horizontal Setup
- 15.3.4 Acquisition Control
- 15.3.5 Trigger
- 15.3.5.1 General Trigger Settings
- 15.3.5.2 Edge Trigger
- 15.3.5.3 Glitch Trigger
- 15.3.5.4 Width Trigger
- 15.3.5.5 Video/TV Trigger
- 15.3.5.6 External Trigger (R&S RTH1002)
- 15.3.5.7 Pattern Trigger (R&S RTH-K19)
- 15.3.5.8 State Trigger (R&S RTH-K19)
- 15.3.5.9 Runt Trigger (R&S RTH-K19)
- 15.3.5.10 Slew Rate Trigger (R&S RTH-K19)
- 15.3.5.11 Data2Clock Trigger (R&S RTH-K19)
- 15.3.5.12 Serial Pattern Trigger (R&S RTH-K19)
- 15.3.5.13 Timeout Trigger (R&S RTH-K19)
- 15.3.5.14 Interval Trigger (R&S RTH-K19)
- 15.3.5.15 Window Trigger (R&S RTH-K19)
- 15.4 Waveform Analysis
- 15.5 Mask Testing
- 15.6 Spectrum Analysis
- 15.7 Digital Multimeter (R&S RTH1002)
- 15.8 Voltmeter (R&S RTH1004)
- 15.9 Counter Mode (R&S RTH-K33)
- 15.10 Data Logging
- 15.11 Protocol Analysis
- 15.12 Logic Analyzer (R&S RTH-B1 MSO)
- 15.13 Documenting Results
- 15.14 General Instrument Setup
- 15.15 WLAN Connection (Option R&S RTH-K200/200US)
- 15.16 User Scripting (R&S RTH-K38)
- Annex
- List of Commands
Spectrum Analysis
R&S
®
Scope Rider RTH
113User Manual 1326.1578.02 ─ 15
Frequency Span
Determines how many values are analyzed by a single FFT (sample frequency), and
thus the frequency resolution. The larger the value, the higher the resolution, but the
longer the required analysis time.
Note: Due to the longer analysis time, changes to the measurement settings may only
become visible with a time delay.
Furthermore, the frequency span determines the visible range in the spectrum dia-
gram. Depending on the selected frequency span, the time scale may be restricted
(see "Time Scale" on page 46).
"Narrow"
8k values analyzed per FFT; time scale ≥ 100 ms/div
"Max"
64k values analyzed per FFT; time scale ≥ 1 μs/div
Remote command:
SPECtrum:FREQuency:SPAN:MODE on page 358
SPECtrum:FREQuency:SPAN[:VALue] on page 358
SPECtrum:FREQuency:CENTer on page 357
SPECtrum:FREQuency:STARt on page 358
SPECtrum:FREQuency:STOP on page 359
SPECtrum:FREQuency:BANDwidth[:RESolution][:VALue] on page 357
Window type
Windowing helps minimize the discontinuities at the end of the measured signal inter-
val and thus reduces the effect of spectral leakage, increasing the frequency resolu-
tion.
Various different window functions are provided in the R&S RTH to suit different input
signals. Each of the window functions has specific characteristics, including some
advantages and some trade-offs. Consider these characteristics carefully to find the
optimum solution for the measurement task.
Table 6-1: Window type characteristics
Window type Frequency
resolution
Magnitude
resolution
Measurement recommendation
Rectangular Best Worst Separation of two tones with almost equal amplitudes
and a small frequency distance
Hamming
Hann
Good Poor Frequency response measurements, sine waves, peri-
odic signals and narrow-band noise
Flat-Top Poor Best Accurate single-tone measurements
Blackman Worst Best Mainly for signals with single frequencies to detect har-
monics
Accurate single-tone measurements
Remote command:
SPECtrum:FREQuency:WINDow:TYPE on page 359
SPECtrum:FREQuency:WINDow:FACTor? on page 359
FFT Mode