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4 MHz~1000MHz Digital TV QAM Analyzer
Features:●High Speed Spectrum Analysis: 4~1000MHz ●Integrated DOCSIS 3.0 Cable Modem ●Integrated Upstream Signal Generator (no FEC) ●Supports ITU- -T J.83 Annex A/B/C ●Error Vector Spectrum: identifies interference signals under QAM carriers, with no break in service ●Auto Test  |
Integrating multiple functions in a single handheld instrument,the new DS2500Q is a powerful Digital TV QAM Analyzer with a comprehensive measurement suite specifically designed for HFC network testing,troubleshooting, and maintenance.
The DS2500Q's main functions include Enhanced Spectrum Analysis, Analog & Digital TV analysis, DOCSIS 3.0 analysis,Upstream Signal Generator, Ethernet testing, and Auto Test.
The revolutionary EVS function enables users to detect coherent distortions hiding under QAM carriers - without interrupting service. The DS2500Q supports Deviser's PC software toolkit, included with each unit, to make data transfer a snap.
Figure 1: Spectrum Analysis
Figure 2: Spectrograph
Figure 3: DVB-C Channel Measurement
Figure 4: Constellation Display
Figure 5: BER and MER Statistical Analysis
Downstream Spectrum Analysis | |
Frequency Range | 4 MHz ~ 1000 MHz |
Frequency Stability | ± 1PPM (0˚C ~50°C) |
Frequency Span | 0 MHz ~ Full span |
Frequency Step | 1 kHz |
Resolution Bandwidth filters (-3dB) | 30kHz,100kHz,300kHz,1MHz,3MHz |
Video Bandwidth filters | 30Hz,100Hz,300Hz,1kHz,3kHz,10kHz,30kHz,100kHz,300kHz,1MHz,3MHz |
Display Scale and Range | 1,2,5,10,20 dB/Div;8 vertical divisions |
Sweep Time | 20ms ~ 25s |
Input Level Range | -60dBmV ~ +60dBmV |
Dynamic Range | 65dB (300kHz RBW) |
Sensitivity | -50dBmV (300kHz RBW,Pre-amplifier On) |
Attenuation | 0~40dB in 1dB steps |
Pre-amplifier | Manual,18dB Gain |
Accuracy of Measurements | <±1.0dB @+25±5°C (typical value) |
Measurement Detector | Positive Peak, Negative Peak, Sample, Average, RMS |
Reference Level | -80dBmV ~ +70dBmV |
Markers | 2 vertical markers |
Upstream Spectrum Analysis | |
Frequency Range | 4~46 MHz (DOCSIS); 4~68 MHz (Euro DOCSIS 2.0); |
Frequency Span | 42/64/84/116/206 MHz, zero span or manual selections (max 200 MHz) |
RBW | 100kHz, 300kHz |
VBW | 30Hz,100Hz,300Hz,1kHz,3kHz,10kHz,30kHz,100kHz,300kHz,1MHz,3MHz |
Display Scale and Range | 1, 2, 5, 10, 20 dB/Div |
Sweep Time | 20ms ~ 25s |
Input Level Range | -60dBmV ~ +60dBmV |
Attenuation | Automatic, 0~40dB |
Pre-amplifier | Manual,18dB Gain |
Accuracy of Measurements | <±1.0dB@+25±5˚C (typical value) |
Measurement Detector | Positive Peak, Negative Peak, Sample, Average |
Markers | 2 vertical markers |
Analog TV Measurement | |
Standards | B/G, I, D/K, L/L’, M/N |
Color Standards | NTSC, PAL, SECAM |
Level Measurement Range | 40dBmV |
Level Measurement Range | -40dBmV ~ +60dBmV |
Accuracy | <±1.0dB @+25 ±5˚C (S/N >30dB) |
Level Resolution | 0.1dB |
Resolution Bandwidth | 300kHz |
CCN | >51dB (Requires +10 dBmV carrier level) |
CTB/CSO | ≥61dB with ±2.0dB Accuracy |
HUM Measurement | 1~20%: ±0.5% (1~5%): ±1.0% (5~20%) |
Tilt | Up to 16 channels |
Pre-amplifier | Manual,18dB Gain |
Attenuator | Automatic, 40dB |
Digital TV Measurement | |
Frequency Range | 46 ~ 1050 MHz |
Power Level Range | -30dBmV ~ +50dBmV |
Level Resolution | 0.1dB |
Accuracy | < ±1.5dB@+25 ±5˚C (C/N>20dB) |
Modulation Type | 16,32,64,128,256 QAM (J.83 Annex A and C);64,256 QAM (J.83 Annex B) |
Interleave Depth | (128, 1) ~ (128, 4) for J.83B; (12, 17) for J.83 A/C |
Symbol Rate | 4.0 MS/s ~ 7.0 MS/s |
SNR | >43dB; Accuracy: ±2.0dB |
MER | >41dB; Accuracy: ±2.0dB |
BER | 1E-3 ~ 1E-9 |
Constellation | 16, 32, 64, 128, 256 QAM |
Cable Modem Measurement | |
Supported Standards | DOCSIS 1.1, 2.0, 3.0; EuroDOCSIS 1.0, 1.1, 2.0, 3.0 |
Downstream Demodulation | 64, 256 QAM |
Downstream Frequency Range | >91 MHz (US); >100 MHz (EU) |
Downstream Maximum Speed | Up to 304 Mbps (6 MHz) and 400 Mbps (8 MHz) |
Downstream Channel Bonding | Up to 8 channels |
Downstream Bandwidth | 6MHz / 8MHz |
Downstream Input Signal Level | -15dBmV ~ +15dBmV |
Upstream Frequency Range | 5 ~ 42 MHz; 5 ~ 65 MHz; 5 ~ 85 MHz |
Upstream Signal Bandwidth | TDMA:200/400/800/1600/3200/6400kHz; S-CDMA:1600/3200/6400kHz |
Upstream Output Signal Level | QAM level range: +17 to +58dBmV; QPSK level range: +17 to +61dBmV |
Upstream Channel Bonding | Up to 4 channels |
Upstream Maximum Speed | 120 Mbps (4 channels bonding) |
Upstream Signal Generator | |
Signal Modulation | CW, QPSK, 16 QAM, 64 QAM, 256 QAM |
Symbol Rate | 1.28 MS/s, 2.56 MS/s, 5.12 MS/s |
MER | >38dB; Accuracy ±2dB |
Frequency Range | 5MHz~85MHz |
Frequency Adjustable Steps | 1MHz |
Signal Level Range | 8.0~58dBmV (CW, QPSK) |
Level Adjustable Step | 1dB |
Others | |
RF Input | 75Ω F-type connector |
USB | USB 1.1 |
Ethernet | RJ45, 10/100T Ethernet |
Display | 4.3inch 480*272 TFT LCD |
AC/DC Adapter | 100~240 V/50~60Hz (AC); 12V/3A (DC) |
Battery | Li-ion, 7.4 V/7.8Ah |
Charge Time | Approx. 4 hours |
Working Time | > 6 Hours |
Dimension (W×H×L) | 245mm*130mm*60mm |
Weight | About 1.5kg (3.3 lbs) |
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