Model D9479 Gigabit QAM Modulator
2
Back Panel Connectors
Specifications
Digital I/O Performance
Maximum Input Rate
1.804 Gbps (4 x 216 Mbps [ASI payload rate] plus 952 Mb/s
[GbE payload rate])
Maximum Aggregate Output Rate
620 Mb/s (16 x 38.8 Mb/s)
RF
Block Conversion
Up to four 6 MHz QAM channels within a 24 MHz bandwidth per QAM
output
Frequency Range (center
frequency)
91 MHz to 867 MHz
Minimum Tuning Step Size
The 24 MHz block of frequencies can be tuned in increments of 250 KHz
RF Output Power Level (per QAM
carrier)
+44 dBmV to +54 dBmV (0.1 dB steps) minimum range
Note:
Noise and spurious performance limits apply with the output power
in the range of 44 dBmV to 54 dBmV.
RF Output Power Tolerance
Note:
Actual output power is within
±2 dB of the value displayed for
setpoint, temperature, and
frequency variations. Power output
adjustment range is from 42 dBmV
to 56 dBmV.
± 2 dB
RF Output Impedance
75 ohm
RF Output Return Loss
(unsquelched)
> 12 dB (within output channel)
Spurious Outputs (50 MHz to
1.1 GHz)
< -60 dB (relative to the average power of the QAM channel with the
highest power level)
Noise Floor (out of band)
< -136 dBc/Hz, > 40 MHz from center frequency
Mechanical
Rack Mount Type
EIA RS-310
Dimensions
1.75 in. x 19 in. x 22.5 in., HWD
(44.45 mm x 482.6 mm x 571.5 mm, HWD)
Weight
13.5 lb (5.4 kg)
