COFDM Modulation Analysis
Constellation Diagram
L1 post, Equalizer out, and Data-PLP
MER and EVM versus Carrier
Measurement Results
Resolution
Accuracy
MER
Modulation Error Ratio
0.1 dB
± 1.5 dB @ 38 to 42 dB
± 1.0 dB @ 20 to 38 dB
± 1.5 dB @ xx to 20 dB
EVM
Error Vector Magnitude
0.1 %
± 0.80 % down to 0.75 % EVM
Spectrum Analysis
Frequency Range
Span Modes
Maximum Span
Minimum Span
Internal reference accuracy
Readout Accuracy
Marker Accuracy
Resolution Bandwidth
Spectral Purity
1 Hz to 4.4 GHz, Standard ; 100 kHz to 4.4 GHz AC-
coupled
(Center Fre 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.
Amplitude Range
1dB Gain Compression
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
Absolute Accuracy (Reference level ≤0
dBm)
± 1.5 dB
Absolute Accuracy (0 dBm < Reference
level ≤ 10 dBm)
± 2.0 dB
Relative Accuracy (Reference level ≤0
dBm)
±0.25 dB
Maximum Safe Input Level (preamp
off, 15 dB atten)
+20dBm
DC Volts
< ±0.2V absolute maximum
Residual Responses (Input terminated,
≤100 KHz span, 0 dB atten, preamp
on)
<-80 dBm 1 Note 1: Known residual responses at
multiples of 10 MHz < -80 dBm typical
Frequency Range
10 Hz to 4.4 GHz
Step sizes
from 10 Hz to 10 MHz
Sweep
up to 700 frequency points per second
4T2-BroadcastMultiProbe bmp3000 ManualEN.odt
Page 12