Cisco Model D-PCG1000 PowerKEY CAS Gateway Ficha De Dados

 

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. 

 

● 

Interfaces with the QPSK Modulator (model D9482) through ATM-25 interfaces to create a 
DAVIC-compliant headend signaling hub 

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Provides Reed-Solomon error correction for improved performance 

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Provides simple-to-use front panel controls for easy operation 

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Provides provisioning, control, and status monitoring information through interface to the 
QPSK Modulator (model D9482) from remote Ethernet access 

Product Specifications 

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)

 

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 

< -16 dBc for BER ≤ 1x10

-8

Maximum Total Adjacent 
Similar QPSK Carrier 
Power for BER ≤ 1x10

-8

< +14 dBc at nominal carrier input level (no in-band noise) 

 

 

 

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