MSP QAM RF Speci!cations
Speci!cations
General
MSP QAM RF System Performance
• Each blade provides eight RF ports
• Annex A up to 32:1 QAM modulation
• Annex B up to 32:1 QAM modulation, !rmware upgradeable to 40:1
Interfaces
MSP QAM Modulation
Note: Speci!cations are relevant for both Annex A and Annex B unless indicated otherwise.
Symbol Rate (nominal)
Annex A
• 64 QAM 6.952 MSPS (1–7 MSPS)
• 128 QAM (1–7 MSPS)
• 256 QAM 6.952 MSPS (1–7 MSPS)
Annex B
• 64 QAM 5.056941 MSPS
• 256 QAM 5.360537 MSPS (1–7 MSPS)
Framing Structure, Modulation
and Channel Coding
Annex A complies with EN 300 429
Annex B complies with ITU-T Rec. J.83
Frequency Range referenced—
Channel Center Frequency
Annex A 54–998 MHz
Annex B 53–999 MHz
Frequency QAM placement
Full frequency agility
Frequency stability (free-running ±5 ppm (10 years) 0–50°C
accuracy standalone)
Frequency Step Size
12.5 KHz
Frequency response
Annex A
• 64 QAM ~0.15 Square Root Raised Cosine Shaping
• 256 QAM ~0.15 Square Root Raised Cosine Shaping
Annex B
• 64 QAM ~0.18 Square Root Raised Cosine Shaping
• 256 QAM ~0.12 Square Root Raised Cosine Shaping
Output level (block level)
All speci!cations (DRFI)
+52 dBmV Total Block Level for 1 QAM / RF connector
+52 dBmV Total Block Level for 2 QAM / RF connector
+55 dBmV Total Block Level for 4 QAM / RF connector
+58 dBmV Total Block Level for 8 QAM / RF connector
+57 dBmV Total Block Level for 16 QAM / RF connector
+57 dBmV Total Block Level for 32 QAM / RF connector
Output level (channel level)
All speci!cation (DRFI)
+52 dBmV Channel Level for 1 QAM / RF connector
+49 dBmV Channel Level for 2 QAM / RF connector
+49 dBmV Channel Level for 4 QAM / RF connector
+49 dBmV Channel Level for 8 QAM / RF connector
+45 dBmV Channel Level for 16 QAM / RF connector
+42 dBmV Channel Level for 32 QAM / RF connector
Technical Speci!cation
MSP QAM RF Technical Speci!cation
Speci!cations
Interfaces
MSP QAM Modulation (cont’d.)
Output level accuracy
(measured with power meter)
±2 dB
Output level step size
(measured with power meter)
0.1 dB
RF test point
(Single for all ports, with mute capability)
-30 dB ±1.5 dB
MER (unequalized)
" 35 dB (typical > 39 dB)
MER (equalized)
" 43 dB
Return loss (in-band)
> 14 dB within an active output channel from 54 MHz to 750 MHz
> 13 dB within an active output channel from 750 MHz to 870 MHz
> 12 dB within an active output channel from 870 MHz to 1002 MHz
> 12 dB in every inactive channel from 54 MHz to 870 MHz
> 10 dB in every inactive channel from 870 MHz to 1002 MHz
Port-to-Port Isolation
> 73 dB
Noise Characteristics
Modulated Adjacent Noise (ACPR)
Single QAM Output, when the
transmitted output power is 52 dBmV
Annex A
• ±4–4.75 MHz
• ±4.75–12 MHz
• ±12–20 MHz
• ±20–28 MHz
<-58 dBc
<-58.5 dBc
<-62 dBc
<-64 dBc
• ±3–3.75 MHz
• ±3.75–9 MHz
• ±9–15 MHz
• ±15–21 MHz
<-58 dBc
<-60 dBc
<-63 dBc
<-65 dBc
Annex B
Note: For measured central frequencies greater than or equal to
600 MHz, add +3 dB to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
Modulated Adjacent Noise (ACPR)
Annex A
Block (adjacent QAMs) of Dual QAM
Output, when the block output power is 52
dBmV
Annex B
• ±4–4.75 MHz
• ±4.75–12 MHz
• ±12–20 MHz
• ±20–28 MHz
<-57.5 dBc
<-57.5 dBc
<-60 dBc
<-62 dBc
• ±3–3.75 MHz
• ±3.75–9 MHz
• ±9–15 MHz
• ±15–21 MHz
<-57.5 dBc
<-59 dBc
<-61.5 dBc
<-63.5 dBc
Note: For measured central frequencies greater than or equal to
600 MHz, add +3 dB to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
Modulated Adjacent Noise (ACPR)
Block (adjacent QAMs) of Quad QAM
Output, when the block output power
is 55 dBmV
Annex A
• ±4–4.75 MHz
• ±4.75–12 MHz
• ±12–20 MHz
• ±20–28 MHz
<-57.5 dBc
<-57.5 dBc
<-60 dBc
<-62 dBc
Annex B
• ±3–3.75 MHz
• ±3.75–9 MHz
• ±9–15 MHz
• ±15–21 MHz
<-57.5 dBc
<-59 dBc
<-61.5 dBc
<-63.5 dBc
Note: For measured central frequencies greater than or equal to
600 MHz, add +3 dB to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
MSP QAM RF Technical Speci!cation
Speci!cations
Noise Characteristics (cont’d.)
Modulated Adjacent Noise (ACPR)
Block (adjacent QAMs) of Octal QAM
Output, when the block output power
is 58 dBmV
Annex A
± 4–4.75 MHz
± 4.75–12 MHz
± 12–20 MHz
± 20–28 MHz
<-57.5 dBc
<-57.5 dBc
<-60 dBc
<-62 dBc
Annex B
± 3–3.75 MHz
± 3.75–9 MHz
± 9–15 MHz
± 15–21 MHz
<-57.5 dBc
<-59 dBc
<-61.5 dBc
<-63.5 dBc
Note: For measured central frequencies greater than or equal to
600 MHz, add +3 dB to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
Modulated Adjacent Noise (ACPR)
Annex A
Block (adjacent QAMs) of 16 QAM Output,
when the block output power is 57 dBmV
Annex B
± 4–4.75 MHz
± 4.75–12 MHz
± 12–20 MHz
± 20–28 MHz
<-57.5 dBc
<-56.5 dBc
<-58 dBc
<-59 dBc
± 3–3.75 MHz
± 3.75–9 MHz
± 9–15 MHz
± 15–21 MHz
<-57.5 dBc
<-58 dBc
<-59.5 dBc
<-60.5 dBc
Note: For measured central frequencies greater than or equal to
600 MHz, add +3 dB to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
Modulated Adjacent Noise (ACPR)
Annex A
Block (adjacent QAMs) of 32 QAM Output,
when the block output power is 57 dBmV
Annex B
± 4–4.75 MHz
± 4.75–12 MHz
± 12–20 MHz
± 20–28 MHz
<-57 dBc
<-54.5 dBc
<-55.5 dBc
<-56 dBc
± 3–3.75 MHz
± 3.75–9 MHz
± 9–15 MHz
± 15–21 MHz
<-57 dBc
<-56.5 dBc
<-57 dBc
<-57.5 dBc
Note: For measured central frequencies greater than or equal to
600 MHz, add +3 dB to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
Annex B
Annex B
Broadband Noise
Average noise for all channels outside ±18
MHz from the band edges excluding
harmonics
Varies with changes in QAM upconversion
• 1 (one) QAM: #-67 dBc regardless of current power level
• 2–8 QAMs: #-63.5 dBc
• 9–32 QAMs: #-73 dBc + 10 * log10(N') dBc where N' is the number
of active QAMs
Note: For frequencies greater than or equal to 600 MHz, add +3 dB
to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
Annex A
Annex A
Broadband Noise
Average noise for all channels outside ±24
MHz from the band edges excluding
harmonics
Varies with changes in QAM upconversion
• 1 (one) QAM: #-65.5 dBc regardless of current power level
• 2–8 QAMs: #-62 dBc
• 9–32 QAMs: #-71.5 dBc + 10 * log10(N') dBc where N' is the
number of active QAMs
Note: For measured central frequencies greater than or equal to
600 MHz, add +3 dB to each value.
Note: Add 1 dB relaxation to each value speci!ed above for noise
and spurious emissions requirements in gap channels with center
MSP QAM RF Technical Speci!cation
Speci!cations
Noise Characteristics (cont’d.)
Higher out-of-band average noise in the
band of 1002 MHz to 3000 MHz
<-55 dBc measured in 6 MHz channel bandwidth with respect to total block power
Varies with changes in QAM upconversion
Number of Active Channels Combined per RF Port " 8:
# -55 + 10*log10 (N') for N' # 8
# -60 + 10*log10 (N') for N' > 8
where N' is the number of active QAMs
Number of Active Channels Combined per RF Port < 8:
# -55 + 10*log10 (N'') for N' # 8
# -60 + 10*log10 (N'') for N' > 8
N" = minimum[4 * N', ceiling(N/4)]
where N’ is the number of active QAMs
Inband Spurious and Noise (center
frequency ±3 MHz, with respect to total
block power), Spurious and noise within
±50 KHz of the carrier is excluded
Annex A <-46.7 dBc typical
Annex B <-48 dBc typical
Mute Depth (Block Mute)
Annex A <-71.5 dBc per block level of 60 dBmV
Annex B <-73 dBc per block level of 60 dBmV
Phase noise (double side band)
–10 KHz
10–50 KHz
50 KHz–3 MHz
<-33 dBc
<-51 dBc
<-51 dBc
Speci!cations are subject to change without notice.
The capabilities, system requirements and/or compatibility with third-party products described herein are subject to change without notice. ARRIS, the ARRIS logo,
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