Item 
Description 
Observation Array Constitution
 Number of Stations
 Number of Inputs for a station
 Subarray Constitution
 Total number of Correlation

 (max.) 16 stations
 (max.) 4 inputs
 4+12 stations / 8+8 stations
 (max.) (16 Auto
 + 120 Cross) × 4 sets

Observation Requirements
 Observation Frequency
 Largest Baseline Length
 Maximum Baseline Velocity
 Frequency Resolution
 Dual Polarization
 Pcal Detection
 Maximum Data Output Rate

 (space VLBI)45GHz, (Others)130/86/43/22GHz
 ± 36,000 km (±0.12 sec)
 7.5 km/sec
 53.3m/sec (for 22GHz Observation)
 Yes, for only 8 stations at once
 Yes
 1.4 GBytes/sec

Input Data Profiles
 Digitization
 Quantization Levels
 Interface
 PDATA Acceptance
 Data Rate
 Input Format

 1024 Msamples/sec × 2 bits/sample
 4 levels as "00" < "01" < "10" < "11"
 VSIH (32parallels data, 1PPS, VALID, PDATA)
 As "format A" of ADS1000
 2Gbps / 1Gbps
 Wide Band Mode (1Gsps x 2bits)
 Narrow Band Mode (1Gbps/512Mbps Multi Data Streams)
 Narrow Band Mode2(2Gbps Multi Data Streams)

Input Data Control
 Rate up Data Acceptance
 Stream Selection & Multiplexing

 Yes, Double rate(form 1Gbps) / Quadruple rate(from 512Mbps)
 Yes

Delay Compensation & Fringe tracking
 Delay Prediction Parameters
 Delay Compensation Period
 Fringe phase quantization
 Fringe phase applying range
 Word length of Fringe tracking

 τg , τg’, τg” and τg’’’ (for 1.024 sec)
 According to FFT segment border
 2π/16 radian
 every 1samples
 16bits, 2's complement

Special Analysis
 FFT points
 Word length
 Window modulation
 Delay residual(△w) compensation
 Scaling
 Cancellation DCoffset
 Frequency Offset Addition
 Requantization

 256k / 128k / 64k / 32k / 16k / 8k points ("k" means "×1,024")
 Fixed point 20+20 bits (real + imaginary)
 Yes, 4 kinds as "Rectangular" / "Hamming" / "Hanning" / "Blackman"
 Yes
 Yes
 Yes
 Yes
 Fixed point 8+8 bits (real + imaginary) : The Output are only USB or LSB

Correlation & Accumulation
 Word length of Correlation
 Station Data Switching
 Word length of Accumulation
 Integration Period
 Frequency binning / Frequency binning setting points
 Points of Correlation Output Data
 Correlation Output Data Interface

 Fixed point (8+8) bits → (15+15) bits
 Yes
 Fixed point (32+32) bits (real + imaginary)
 25.6msec/51.2ms/102.4ms
 10.24sec(102.4ms unit)
 Yes, 1 / 2 / 4 / 8 / 16 / 32 / 64 / 128 / 256 channels bin.
 Yes, (for each 512points of output)
 8,192points(for each correlation). Each points are result of binning

Control Interface 
10Gbits Ether × 4 ports, TCP/IP, Based on VSIS 