abc 4T2 bmp 3000 Інструкція з експлуатації - Сторінка 12
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Друкувати сторінкуCOFDM Modulation Analysis
Constellation Diagram
MER and EVM versus Carrier
Measurement Results
MER
Modulation Error Ratio
EVM
Error Vector Magnitude
Spectrum Analysis
Frequency Range
Span Modes
Maximum Span
Minimum Span
Internal reference accuracy
Readout Accuracy
Marker Accuracy
Resolution Bandwidth
Spectral Purity
Amplitude Range
1dB Gain Compression
Absolute Accuracy (Reference level ≤0
dBm)
Absolute Accuracy (0 dBm < Reference
level ≤ 10 dBm)
Relative Accuracy (Reference level ≤0
dBm)
Maximum Safe Input Level (preamp
off, 15 dB atten)
DC Volts
Residual Responses (Input terminated,
≤100 KHz span, 0 dB atten, preamp
on)
Frequency Range
Step sizes
Sweep
4T2-BroadcastMultiProbe bmp3000 ManualEN.odt
L1 post, Equalizer out, and Data-PLP
Resolution
Accuracy
0.1 dB
± 1.5 dB @ 38 to 42 dB
± 1.0 dB @ 20 to 38 dB
± 1.5 dB @ xx to 20 dB
0.1 %
± 0.80 % down to 0.75 % EVM
1 Hz to 4.4 GHz, Standard ; 100 kHz to 4.4 GHz AC-
coupled
(Center Frequency + Span) or (Start + Stop Frequencies)
4.4 GHz
10 Hz or Zero Span
± 1 ppm (improved with external reference)
reference error ±1 sample
reference error ±1 sample
0.1 Hz to 250 KHz and 5 MHz
Residual FM, 3KHz Audio LPF, 15 KHz IF BW: [0.1 Hz + 4 Hz
/ GHz] typical RMS FM (e.g. 2 GHz RF would have 8.1 Hz
RMS FM). Increasing IF BW increases residual FM.
1dB Gain Compression to Displayed Average Noise Level
(DANL)
(attenuator set to 15dB, preamp off) +16dBm Typical, 1Hz
to 150MHz (100 kHz to 150 MHz, Option 3) +19dBm
Typical, 150MHz to 4.4GHz
± 1.5 dB
± 2.0 dB
±0.25 dB
+20dBm
< ±0.2V absolute maximum
<-80 dBm 1 Note 1: Known residual responses at
multiples of 10 MHz < -80 dBm typical
10 Hz to 4.4 GHz
from 10 Hz to 10 MHz
up to 700 frequency points per second
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