Manufacturer: Tektronix
Model: RSA6120B
Datasheet
Specifications
All specifications apply to all models unless noted otherwise.
Model overview
For optional displays and measurements, see the individual options sections
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- DPX®-based measurements on real-time data
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DPX Spectrum display (live RF color-graded spectrum)
DPX Spectrogram (Live spectrograms)
DPX amplitude vs. time
DPX frequency vs. time
DPX phase vs. time
- Displays and Measurements from acquisition data
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Spectrum (amplitude vs linear or log frequency)
Spectrogram (amplitude vs. frequency over time of acquisition data)
Spurious (amplitude vs linear or log frequency)
Amplitude vs. time
Frequency vs. time
Phase vs. time
Amplitude modulation vs. time
Frequency modulation vs. time
Phase modulation vs. time
RF IQ vs. time
Time overview
CCDF
Peak-to-Average ratio
- Frequency offset measurement
- Signal analysis can be performed either at center frequency or the assigned measurement frequency up to the limits of the instrument acquisition and measurement bandwidths
- Acquisition replay
- Replay entire contents of acquisition memory or subset of acquisitions and frames. history can collect up to 64,000 acquisitions (each containing one or more frames) or 1 GB of sample data, including DPX spectrogram data, whichever limit is reached first
Frequency characteristics
- Center frequency setting resolution
- 0.1 Hz
- Frequency marker readout accuracy
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±(RE × MF + 0.001 × Span + 2) Hz
(RE = Reference frequency error)
(MF = Marker frequency (Hz))
- Span accuracy
- ±0.3% (auto mode)
- Reference frequency
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- Initial accuracy at cal
- 1 × 10 -7 (after 10 minute warm-up)
- Aging per day
- 1 × 10 -9 (after 30 days of operation)
- Aging per year
- 5 × 10 -8 (first year of operation)
- Aging per 10 years
- 3 × 10 -7 (after 10 years of operation)
- Temperature drift
- 2 × 10 -8 (0 to 50 °C)
- Cumulative error (temperature + aging)
- 4 × 10 -7 (within 10 years after calibration, typical)
- Reference output level
- >0 dBm (internal reference selected)
- Reference output level (loopthrough)
- 0 dB nominal gain from Ext Ref In to Ref Output, +15 dBm max output
- External reference input frequencies
- 1 to 25 MHz (1 MHz steps) + 1.2288 MHz, 4.8 MHz, 19.6608 MHz, 31.07 MHz
- External reference input requirements
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- Frequency accuracy
- Within ±3 × 10 -7 of a valid listed input frequency
- Spurious
- < -80 dBc within 100 kHz offset to avoid on-screen spurious
- Input level range
- -10 dBm to +6 dBm
Trigger related characteristics
- Trigger event source
- RF input, Trigger 1 (front panel), Trigger 2 (rear panel), Gated, Line
- Trigger setting
- Trigger position settable from 1 to 99% of total acquisition length
- Trigger combinatorial logic
- Trigger 1 AND trigger 2 / gate may be defined as a trigger event
- Trigger actions
- Save acquisition and/or save picture on trigger
Power level trigger
- Level range
- 0 dB to –100 dB from reference level
- Accuracy
- For trigger levels >30 dB above noise floor, 10% to 90% of signal level
- Level ≥ –50 dB from reference level
- ±0.5 dB
- From < –50 dB to –70 dB from reference level
- ±1.5 dB
- Trigger bandwidth range
- At maximum acquisition BW
- Standard
- 4 kHz to 20 MHz + wide open
- Opt. 110
- 11 kHz to 60 MHz + wide open
- Trigger position timing uncertainty
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- 40 MHz acquisition BW, 20 MHz BW
- Uncertainty = ±15 ns
- 110 MHz acquisition BW, 60 MHz BW (Opt 110)
- Uncertainty = ±5 ns
- Trigger re-arm time, minimum (fast frame on)
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- 10 MHz acquisition BW
- ≤25 μs
- 40 MHz acquisition BW
- ≤10 μs
- 110 MHz acquisition BW (Opt. 110)
- ≤5 μs
Frequency mask trigger (Opt. 52)
- Mask shape
- User defined
- Mask point horizontal resolution
- <0.12% of span
- Level range
- 0 dB to –80 dB from reference level
- Level accuracy 1
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- 0 to –50 dB from reference level
- ±(Channel response + 1.0 dB)
- –50 dB to –70 dB from reference level
- ±(Channel response + 2.5 dB)
1 For masks >30 dB above noise floor.
- Span range
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100 Hz to 40 MHz
100 Hz to 110 MHz (Opt. 110)
- Minimum signal duration for 100% probability of trigger at 100% amplitude
- Events lasting less than minimum event duration specification will result in degraded frequency mask trigger accuracy.
- Opt. 110 SPAN = 110 MHz
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- Std. SPAN = 40 MHz
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- Trigger position uncertainty
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Advanced triggers
- DPX density trigger
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- Density range
- 0 to 100% density
- Horizontal range
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0.25 hz to 40 MHz
0.25 Hz to 110 MHz (Opt. 110)
- Runt trigger
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- Runt definitions
- Positive, Negative
- Accuracy (for trigger levels >30 dB above noise floor, 10% to 90% of signal level)
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±0.5 dB (level ≥ –50 dB from reference level)
±1.5 dB (from < –50 dB to –70 dB from reference level)
- Time qualified triggering
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- Trigger types and source
- Time qualification may be applied to: Level, Frequency mask (Opt. 52), DPX density, Runt, Ext. 1, Ext. 2
- Time qualification range
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T1: 0 to 10 seconds
T2: 0 to 10 seconds
- Time qualification definitions
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Shorter than T1
Longer than T1
Longer than t1 AND shorter than T2
Shorter than t1 OR longer than t2
- Frequency edge trigger
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- Range
- ±(1/2 × (Acq. BW or TDBW if active))
- Minimum event duration
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25 ns for 40 MHz acquisition BW using no trigger RBW
50 ns for 40 MHz acquisition BW using 20 MHz trigger RBW
9.1 ns for 110 MHz Acq. BW using no RBW
16.7 ns for 110 MHz Acq. BW using 60 MHz trigger RBW
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- Timing uncertainty
- Same as power trigger position timing uncertainty
- Holdoff trigger
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- Range
- 20 ns to 10 seconds
Minimum signal duration
For 100% probability of intercept, full amplitude
- 110 MHz span
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- 40 MHz span
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External trigger 1
- Level range
- -2.5 V to +2.5 V
- Level setting resolution
- 0.01 V
- Trigger position timing uncertainty (50 Ω input impedance)
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- MHz acquisition BW, 40 MHz span
- Uncertainty = ±20 ns
- 110 MHz acquisition BW, 110 MHz span (Opt. 110)
- Uncertainty = ±12 ns
- Input impedance
- Selectable 50 Ω/5 kΩ impedance (nominal)
External trigger 2
- Threshold voltage
- Fixed, TTL
- Input impedance
- 10 kΩ (nominal)
- Trigger state select
- High, Low
Acquisition related
- A/D converter
- 100 MS/s 14 bit (optional 300 MS/s, 14 bit, Opt. 110)
- Minimum acquisition length
- 64 samples
- Acquisition length setting resolution
- 1 sample
- Fast frame acquisition mode
- >64,000 records can be stored in a single acquisition (for pulse measurements and spectrogram analysis)
- Memory depth (time) and minimum time domain resolution
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1 In spans ≤2 MHz, higher resolution data is stored, reducing maximum acquisition time.
Bandwidth related
- Resolution bandwidth
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- Resolution bandwidth range (spectrum analysis)
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0.1 Hz to 8 MHz
0.1 Hz to 10 MHz (Opt. 110)
- Resolution bandwidth shape
- Approximately Gaussian, Shape factor 4.1:1 (60:3 dB) ±10%, typical
- Resolution bandwidth accuracy
- ±1% (auto-coupled RBW mode)
- Alternative resolution bandwidth types
- Kaiser window (RBW), –6 dB mil, CISPR, Blackman-Harris 4B window, Uniform (none) window, Flat-top (CW ampl.) window, Hanning window
- Video bandwidth
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- Video bandwidth range
- 1 Hz to 10 MHz plus wide open
- RBW/VBW maximum
- 10,000:1
- RBW/VBW minimum
- 1:1 plus wide open
- Resolution
- 5% of entered value
- Accuracy (typical)
- ±10%
- Time domain bandwidth (amplitude vs. time display)
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- Time domain bandwidth range
- At least 1/10 to 1/10,000 of acquisition bandwidth, 1 Hz minimum
- Time domain bandwidth shape
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≤10 MHz, Approximately Gaussian, Shape factor 4.1:1 (60:3 dB), typical
20 MHz (60 MHz, Opt. 110), Shape factor< 2.5:1 (60:3 dB) typical
- Time domain bandwidth accuracy
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1 Hz to 10 MHz = 1% (auto-coupled)
20 MHz and 60 MHz = 10%
- Minimum settable spectrum analysis RBW vs. span
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- Spectrum display traces, detector, and functions
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- Minimum FFT length vs. Trace length (independent of span and RBW)
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- Resolution BW range vs. span (DPX®)
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- Minimum RBW, swept spans
- 10 kHz
DPX® related
- DPX® digital phosphor spectrum processing
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- Spectrum processing rate (RBW = auto, trace length 801)
- 292,968/s
- DPX bitmap resolution
- 201 × 801
- DPX bitmap color dynamic range
- 8G (99 dB)
- Marker information
- Amplitude, frequency, and signal density on the DPX display
- Minimum signal duration for 100% probability of detection (Max-hold on)
- See table: Minimum signal duration for 100% probability of intercept, full amplitude
- Span range (continuous processing)
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100 Hz to 40 MHz
(110 MHz with opt. 110)
- Span range (swept)
- Up to instrument frequency range
- Dwell time per step
- 50 ms to 100 s
- Trace processing
- Color-graded bitmap, +Peak, –Peak, Average
- Trace length
- 801, 2401, 4001, 10401
- Resolution BW accuracy
- 7%
- DPX® zero-span amplitude, frequency, phase performance (Nominal)
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- Measurement bandwidth range
- 100 Hz to maximum acquisition bandwidth of instrument
- Time domain bandwidth (TDBW) range
- At least 1/10 to 1/10,000 of acquisition bandwidth, 1 Hz minimum
- Time domain bandwidth (TDBW) accuracy
- ±1%
- Sweep time range
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100 ns (minimum)
1 s (maximum, measurement BW >60 MHz)
2000 s (maximum, measurement BW ≤60 MHz)
- Time accuracy
- ±(0.5 % + reference frequency accuracy)
- Zero-span trigger timing uncertainty (power trigger)
- +/-(Zero-span sweep time / 400) at trigger point, for S/N ratio ≥40 dB
- DPX frequency display range
- ±100 MHz maximum
- DPX phase display range
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±200 degrees maximum, phase-wrapped
±500G degrees, phase-unwrapped
- DPX® spectrogram performance
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- Span range
- 100 Hz to maximum acquisition bandwidth
- DPX spectrogram trace detection
- +Peak, –Peak, avg (VRMS)
- DPX spectrogram trace length
- 801 to 4001
- DPX spectrogram memory depth
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Trace length = 801: 60,000 traces
Trace length = 2401: 20,000 traces
Trace length = 4001: 12,000 traces
- Time resolution per line
- 110 µs to 6400 s, user settable
- Maximum recording time vs. line resolution
- 6.6 seconds (801 points/trace, 110 μs/line) to 4444 days (801 points/trace, 6400 s/line)
Stability
- Residual FM
- <2 hz="" sub="">p-p in 1 second (95% confidence, typical)
Phase noise sidebands
- dBc/Hz at specified center frequency
- CF = 1 GHz
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- CF = 2 GHz
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- CF = 6 GHz
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