Toner Cable DDC864A Digital Signal Downconverter User Manual
Ddc864, Digital signal downconverter
DDC864
Digital Signal Downconverter
969 Horsham Road
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Horsham, Pennsylvania 19044 USA
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Phone: 215-675-2053 Fax: 215-675-7543
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The R.L. Drake DDC864A is a low noise downconverter designed for translating digi-
tal ATSC, 8VSB signals from their off-air channel to a 44 MHz IF output. The output of
the DDC864A can be connected to a DUC series upconverter to place the digital sig-
nal on a new output channel.
When the DDC864A is used with the DUC864, "on channel" conversions, (the same
input channel on the DCC and output channel on the DUC) are acceptable.
The DDC864A provides low noise figure and low phase noise as well as a flat pass-
band to minimize signal deterioration.
The DDC864A is optimized for use with ATSC 8VSB modulation in a 6 MHz wide
channel assignment. The passband is designed for optimized operation with 8VSB
signals in an adjacent channel environment. For translation of QAM signals, the
Drake model DQT1000 is preferred for this task.
RF Input
Frequency Range:
54 to 806 MHz; Off-AIR channels 2 to 69
Input Level Range:
-25 dBmV to +30 dBmV
Impedance:
75 Ohms, return loss of 8 db
Noise Figure:
10 dB, maximum
Image Rejection:
>75 dB
Output
IF Frequency:
44 MHz
Level:
+30 dBmV, ±1 dB
Impedance:
75 Ohms, return loss of dB
Frequency Stability:
±30 PPM
Channel Bandwidth:
6 MHz SAW filtered
SSB Phase Noise:
-88 dBc @ 10 KHz offset
Amplitude Flatness
(6 MHz Channel):
±1 dB over 4 MHz
General
DC Power Input:
+12 V ±5% @ 150 mA; +5 V ±5% at 150 mA
Operating Temperature:
0°C to +50°C, ambient
Size:
1" W x 3.5" H x 9.25" D. (2.5 cm) W x (8.9 cm) H x (23.5 cm) D
Weight:
11 oz. (0.31 Kg)
Specifications
DDC864A Digital
Signal Downconverter