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Hukk CR1200R digital signal analyzer with ability of return channel
testing provides 64/256 QAM and IF 44 MHz signals measuring,
display with null interval for viewing cable modem’s return signals and
transition processes. It also performs automated measures at checking
all analog and digital channels. Device is equipped with hard waterproof
coffer. Besides, CR1200R is full functional analog signal level meter and
is fully compatible with DOCSIS modems.
CR1200R features functions of QAM diagram analysis and BER meter for
modulated signal. Using it operator can quickly evaluate quality
of equipment installation. Beside QAM measure CR1200R allows measure return
channel path with full specter representation and gives a possibility
to measure IF 44 MHz signals and fix return channel faults.
Special mode with null interval gives user possibility to measure TDMA
return channel signals such as 16 QAM or QPSK used in cable
modems and telephony. A display with null interval can show real TDMA
signals and fast transitions up to 10 µsec in duration.
Specifications
DIGITAL SIGNAL ANALYSIS
| MODULATION |
| Modulation Type: |
64/256 QAM (DVS031, ITU-T J.83 Annex B) |
| Lock Range 64 QAM: |
-20 to +50 dBmV (typical) |
| Lock Range 256 QAM: |
-15 to +50 dBmV at 256 QAM (typical) |
| MER MODULATION ERROR
RATIO |
| Range: |
21 to 35 dB |
| MER Accuracy: |
±2.0 dB |
| SIGANL LEVEL |
| Accuracy: |
± 2.0 dB @ 25º C Average Detector |
| GRAPHIC DISPLAYS |
| Constellation: |
I-Q display of 64 or 256-QAM signal |
| Equalizer: |
Display of adaptive equalizer taps |
| BER (Pre and Post
FEC) |
| Range |
1.0 x 10-9 to 9.0 x
10-3 |
| FEC Lock |
Loss/Lock-indication |
| Errored Seconds |
Numerical count of errored seconds |
| Severely Errored Seconds: |
Numerical Count of SEC |
ANALOG SIGNAL ANALYSIS
| Modulation Type: |
VSB (NTSC) |
| Operation Range: |
-20 to +50 dBmV typical |
| Signal Level Meter Measurements: |
Video & Audio Carrier Level |
| Accuracy: |
± 2.0 dB over operating temperature. |
| Amplitude: |
-20 to +50 dBmV |
| SPECTRUM MODE |
| Spans: |
6.25, 12.5, 25 and 50 MHz. |
| Display scaling and range: |
2, 5 and 10 dB/div. (6 divisions) |
| Spurious-Free Dynamic range: |
60 dB |
| Measurement range: |
-50 to +50 dBmV |
| SYSTEM FEATURES |
| ELECTRICAL |
| Tuning Range: |
50-800 MHz |
| Input Resistance: |
75 ohms (nominal) |
| RF Input: |
F81 connector (field replaceable) |
| Serial Interface: |
EIA RS-232 |
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