Cisco Model D-PCG1000 PowerKEY CAS Gateway Datenbogen
Data Sheet
DAVIC QPSK Demodulator – Model D9494
The QPSK Demodulator Model D9494 is an integral component of Scientific Atlanta’s
Digital Headend product line. This device works in conjunction with the QPSK modulator
and digital set-tops to provide forward signaling and reverse path communications for
interactive video and data systems over a two-way CATV network. Combined, the QPSK
demodulator and QPSK modulator create a DAVIC-compliant headend QPSK signaling
hub.
Digital Headend product line. This device works in conjunction with the QPSK modulator
and digital set-tops to provide forward signaling and reverse path communications for
interactive video and data systems over a two-way CATV network. Combined, the QPSK
demodulator and QPSK modulator create a DAVIC-compliant headend QPSK signaling
hub.
Features
●
Interfaces with the QPSK Modulator (model D9482) through ATM-25 interfaces to create a
DAVIC-compliant headend signaling hub
DAVIC-compliant headend signaling hub
●
Provides Reed-Solomon error correction for improved performance
●
Provides simple-to-use front panel controls for easy operation
●
Provides provisioning, control, and status monitoring information through interface to the
QPSK Modulator (model D9482) from remote Ethernet access
QPSK Modulator (model D9482) from remote Ethernet access
Product Specifications
Table 1.
Product Specifications
Specification
Value
RF
Tuner Frequency Range
5.00 to 42.00 MHz
Tuning Step Size
250 kHz
Tuner Input Ranges
-13 to +3 dBmV (range 1)
-5 to +11 dBmV (range 2)
+3 to +19 dBmV (range 3)
+11 to +27 dBmV (range 4)
-5 to +11 dBmV (range 2)
+3 to +19 dBmV (range 3)
+11 to +27 dBmV (range 4)
Maximum Input Power
> 35 dBmV (range 4) over specified tuner frequency range
Input Return Loss
> 12 dB
Tuner LO Leakage at Input < -15 dBmV (range 1)
Maximum Co-channel
Single-tone Interferer
Single-tone Interferer
< -16 dBc for BER ≤ 1x10
-8
Maximum Total Adjacent
Similar QPSK Carrier
Power for BER ≤ 1x10
Similar QPSK Carrier
Power for BER ≤ 1x10
-8
< +14 dBc at nominal carrier input level (no in-band noise)
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