Appendix A: Specifications
This section contains the specifications for the DDS200 Digital Demodulation
System. All specifications are guaranteed unless labeled “typical.” Typical
specifications are provided for your convenience and are not guaranteed.
Specifications labeled with the n symbol are checked in the Performance Test
(PT) procedure in the service manual.
NOTE. Performance requirements are valid provided that the instruments are
operating within environmental parameters and have warmed up for at least one
hour.
T able A–1: Electrical Specifications
Characteristics Requirements Supplemental information
Overvoltage category CA T II
RF Input Connector: front-panel female type BNC
Frequency range 47 to 862 MHz
n
Level 100 V to 700 mV
Accuracy , typical " 3 dB
Impedance, typical 75
Return loss
n
Channel bandwidth, typical 8 MHz
IF Input
Level, typical 10 to 100 mV
Impedance, typical 50
Return loss (33 to 40 MHz)
n
IF Output
Level, typical 45 mV (93 dBuV)
Impedance, typical 50
Frequency, typical 36 MHz
Demodulator
Modulation modes
n
Pulse response roll-off factors 0.15, 0.20, 0.25,
1
Operation at 4, 128, and 256 QAM is not specified.
1
y 12 dB
(80 to 100 dBuV)
y 20 dB
4, 16, 32, 64, 128,
256 QAM
0.30
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Appendix A: Specifications
T able A–1: Electrical Specifications (cont.)
Characteristics Supplemental informationRequirements
Insertion loss (64 QAM)
Symbol rate, typical 1.5 to 7.0 MBaud When setting the symbol rate value, the accuracy should be to three
Symbol rate 6.9 MBaud
n
Equalizer Self adapting, selectable with freeze mode
Reed-Solomon decoder 204, 188 byte t=8, selectable
Bit error rate display range 10-3 to 10
Interleaving Forney , L=12
Energy dispersal IESS 309 to DVB specification
Internal Noise Generator (Option
B5)
Signal/Noise ratio, typical 12 to 62 dB
Resolution 0.1 dB
Filter selection Automatic conversion and correct setting of S/N ratio based on
Outputs
Parallel MPEG2 transport
stream
Standard LVDS (188 or 204 bytes), DVB-A010
Source impedance, typical 100
DC component, typical 1.25 V
Signal amplitude, typical 247 mV to 454 mV
Transmission link length
(Max)
Serial MPEG2 transport stream Connector: rear-panel female type BNC
Standard ASI
Source impedance, typical 75
DC component, typical 0 V
Signal amplitude, typical 0.9 V
Transmission rate, typical 270 Mbit/s Fixed
QAM serial data
(before Reed-Solomon)
Source impedance, typical 75
QAM serial clock output Connector: rear-panel female type BNC
Source impedance,
typical
1.5 dB
decimal places
-10
selected filter.
Connector: rear-panel 25-pin
Approximately 5 meters
p-p
Connector: rear-panel female type BNC
75
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DDS200 Digital Demodulation System User Manual
T able A–1: Electrical Specifications (cont.)
Characteristics Supplemental informationRequirements
Measurement Displays
Graphic
Constellation display
Calculated
Bit error rate (BER)
Frequency offset
Level
I/Q phase error In degrees
I/Q amplitude
imbalance
Carrier suppression
Residual carrier In dB
Sinusoidal interference
(C/I)
Signal/noise ratio (SNR) In dB
Phase jitter In degrees
Modulation error ratio
(MER)
Synchronization Information
Symbol rate
Carrier recovery
Equalizer
MPEG2 frame
Appendix A: Specifications
As a percentage
In dB
As RMS or peak value
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Appendix A: Specifications
T able A–2: Certifications and compliances
EC Declaration of Conformity –
EMC
EMC Compliance Meets the intent of Directive 89/336/EEC—Amended by 91/263/EEC, 92/31/EEC, 93/68/EEC— for
FCC Compliance Emissions comply with FCC Code of Federal Regulations 47, Part 15, Subpart B, Class A Limits
EC Declaration of Conformity –
Low Voltage
Approvals UL31 11-1 – Standard for electrical measuring and test equipment
Installation Category Descriptions Terminals on this product may have different installation category designations. The installation
Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was
demonstrated to the following specifications as listed in the Official Journal of the European
Communities:
EN 55011 Class A Radiated and Conducted Emissions
EN 55011 Class B Radiated and Conducted Emissions
EN 50081-1 Emissions:
EN 55022 Class B Radiated and Conducted Emissions
EN 60555-2 AC Power Line Harmonic Emissions
EN 50082-1 Immunity:
IEC 801-2 Electrostatic Discharge Immunity
IEC 801-3 RF Electromagnetic Field Immunity
IEC 801-4 Electrical Fast T ransient/Burst Immunity
IEC 801-5 Power Line Surge Immunity
Electromagnetic Compatibility when it is used with the product(s) stated in the specifications table.
Refer to the EMC specification published for the stated products. May not meet the intent of the
Directive if used with other products.
Compliance was demonstrated to the following specification as listed in the Official Journal of the
European Communities:
Low Voltage Directive 73/23/EEC, Amended by 93/68/EEC
EN 61010-1:1993 Safety requirements for electrical equipment for measurement,
control, and laboratory use
CAN/CSA C22.2 No. 1010.1 – Safety requirements for electrical equipment for measurement,
control and laboratory use
categories are:
CA T III Distribution-level mains (usually permanently connected). Equipment at this level is
typically in a fixed industrial location
CA T II Local-level mains (wall sockets). Equipment at this level includes appliances, portable
tools, and similar products. Equipment is usually cord-connected
CA T I Secondary (signal level) or battery operated circuits of electronic equipment
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DDS200 Digital Demodulation System User Manual
T able A–3: Power Characteristics
Characteristic Description
Appendix A: Specifications
Line Voltage
(automatic selection)
Line Frequency 50 to 60 Hz
Power Consumption 100 VA
85 to 132 VAC
187 to 264 VAC
T able A–4: Environmental Characteristics
Characteristic Description
Operating temperature range 0_ C to +50_ C
Rated temperature range +5_ C to +45_ C
Storage temperature range -40_ C to +70_ C
T able A–5: Physical Characteristics
Dimension mm in
Height 147 5.8
Width 450 17.7
Depth 460 18.1
Weight kg lb
Net 12 26.5
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