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800 Mbit/s PRML Channel Analyzer
550 MHz Analog Bandwidth
Significantly increased throughput
- PRML chip integration with data rates to 800 Mbits/sec.
- Fast PRML channel optimization
- 800Mflux/s programmable Pattern Generator
- Bit precompensation with 20ps resolution
- 400MHz bandwidth Spectrum Analyzer
- Supports universal preamplifier UP-7 and TSA-compatible cartridge
- Bit shift analysis 250 MFlux/s (333Mbit/s with 1-7 code) Optional
The Guzik RWA-2550++ Read/Write Analyzer provides
a wide range of parametric and PRML measurements. PRML tests are formed
with integrated PRML chips. Write and read parameters of any PRML
chip can be optimized in a few seconds to achieve lower error rates.
All tests are implemented under WITE software, suitable for both engineering
and production application. Software is run on a Pentium-based PC
under Windows 95 or Windows 98.
Features:
Wide range of PRML tests including:
- Bit error rate measurements
- Off-track channel performance
Non-linear transition shift (NLTS) by harmonic elimination method
Optimization of PRML channels
- Based on channel quality monitor
- Based on error rate measurements
- Customized optimization algorithms
All industry-standard parametric tests
The Spectrum Analyzer provides frequency domain tests:
- Overwrite
- Spectrum analysis
- NLTS measurements
- Signal to noise ratio (including transitional noise)
- Partial erasure
Significantly reduced production test time
All engineering and production tests are implemented
in WITE software on any Pentium-based PC under Windows 95, or Windows
98
Guzik RWA-2550++ Preliminary Specifications:
Maximum Data Rates
PRML: 800 Mbits/s
Error Rate Analyzer: 800 Mbits/s, limited by PRML chip.
Bit shift analysis: Optional, 5 to 250 Mflux/s
PRML Chip Integration
- Plug-in chip adapter module
- Data rate 800 Mbit/s.
- Integrated PRML chips from Cirrus Logic, DataPath, GEC Plessey
IBM, Lucent Technology, Marvell, NEC, SSI, and others.
- Custom PRML chips may be integrated upon request.
Analog Channel 971++
Bandwidth: 0.1 to 550 MHz at -3 dB
Flatness: 0.3 to 400 MHz at ± 0.2 dB
Group Delay: Flatness 200ps up to 400MHz
Programmable Attenuator: 36 dB in 2 dB steps
Typical Non-Linear Distortion: Better than 1%
(400MHz, output level 300mv p/p single-ended)
Filters: 4 low pass or programmable filters (custom cutoff frequencies
for low pass filters up to 400 MHz).
High/band pass filters available for popcorn noise measurement.
Write Current: Programmable 0 to 80 mA in 0.02 mA steps.
MR Read Bias: Programmable -20 to 20 mA in 0.01 mA steps or serial
control of bias current.
Differentiators: Two plug-in positions for custom modules with data
range from 5 to 250 Mflux/s (optional).
Spectrum Analyzer
Features: Programmable overwrite, spectrum analysis, non-linear transition
shift (NLTS), partial erasure, signal to noise ratio (SNR) including
transitional noise.
| Frequency range: |
0.5 to 400 MHz |
| Accuracy: |
± 0.2 dB with 70 dB dynamic range. |
| Selectivity: |
100kHz at –3dB ; 500kHz at –60dB |
| Video bandwidth: |
Switchable between 100 KHz and
10 KHz. |
| Noise floor level: |
Better than –80 dB. |
Head Amplifiers
- More than 100 types available.
- Amplifiers with separate read and write chips.
- Parallel and serial control of head amplifier chip(s).
- TSA – compatible cartridge design.
- Factory calibrated amplification
- Compatible with UP6 or UP7 universal preamplifiers
Write Channel
Frequency Synthesizer: Up to 1 GHz with better than 1Hz resolution
Frequency Stability: + 2.5ppm up to 75° C, + 1
ppm/year
Pattern Generator: 800 Mflux/s Data rate. Programmable pattern up
to a maximum of 32 Kbytes of encoded data and hierarchical pattern
structure.
Precompensation: Individual bit precompensation with 20ps resolution.
Jitter: 3 ps RMS.
Parametric Measurements
| Bandwidth: |
0.1 to 550MHz at –3dB |
| Flatness: |
0.3 to 400 MHz at + .2dB |
| TAA accuracy: |
± 1.5% |
| Typical non-linear distortion |
Better than 1% |
| Modulation: |
± 2.0% |
| SNR: |
± 0.5 dB |
| Crest factor: |
± 2.0% |
| Overwrite: |
± 0.2 dB |
| Pulse width: |
± 1.5% (or better than + (100ps). |
Bit Shift Analyzer (optional)
| Data rate: |
250Mflux/s
(333 Mbit/s with 1-7 code) |
| Accuracy: |
Better than 100ps |
| Resolution: |
20ps |
| Window Centering: |
Better than 100ps |
Physical
RWA-2550++:
Size: 21.6" x 17.6" x 7.3"
Weight: 30 lbs.
Power: 100-240 VAC ± 10%, 50/60 Hz.
Ana-971++:
Size: 19.0" x 17.6" x 3.3"
Weight: 10 lbs.
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