Atec Tektronix-DDS200 - Manual

DDS200 Digital Demodulation System User Manual A–1
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.
Table A–1: Electrical Specifications
Characteristics Requirements Supplemental information
Overvoltage category CAT II
RF Input Connector: front-panel female type BNC
n
Frequency range 47 to 862 MHz
Level 100 mV to 700 mV
Accuracy, typical
" 3 dB
Impedance, typical 75 W
n
Return loss
y 12 dB
Channel bandwidth, typical 8 MHz
IF Input
Level, typical 10 to 100 mV
(80 to 100 dBuV)
Impedance, typical 50
W
n
Return loss (33 to 40 MHz)
y 20 dB
IF Output
Level, typical 45 mV (93 dBuV)
Impedance, typical 50 W
Frequency, typical 36 MHz
Demodulator
n
Modulation modes 1 4, 16, 32, 64, 128,
256 QAM
Pulse response roll-off factors 0.15, 0.20, 0.25,
0.30
1 Operation at 4, 128, and 256 QAM is not specified.