The Site Master S251B is a broadband two-port transmission line and antenna analyzer that performs return loss (SWR), cable loss and distance-to-fault measurement for cellular, PCS/GSM and ISM market applications.
Site Master’s patented high RF interference rejection enables the S251B to accurately measure cable and antenna systems in the presence of high RF activity. In addition, the high dynamic range (>80 dB) enables the S251B to perform antenna-to-antenna isolation measurements.
Selectable output levels of +6 dBm or –30 dBm and optional built-in Bias Tee provide the S251B with a convenient means of verifying Tower Mounted Amplifier (TMA) gain before and after installation. Status of applied voltage and current load indicate the operation and function of the TMA.
The Site Master Software Tools supplied with each S251B operates with Windows 95, Windows 98, and Windows NT. Software Tools can download traces and cable parameters to S251B via the RS-232 serial port.
FEATURES
- Accurately Tests Return Loss/SWR in Transmission Line and Antenna Systems
- High Immunity to Live Site RF Interference
- Extended Distance-to-Fault Range
- 10 User Configurations include Calibrations
- Increase Current Capability (to 240 mA) with Built-in-Bias Tee
- Gain/Insertion Measurement
- RF Source 625 to 2500 MHz at 10 kHz steps
- Trace Storage with Date/Time Stamp, Alphanumeric labeling (up to 200 memory locations)
- Trace and Cable Parameters Downloadable to Site Master
- Trace Overlay, Trace Math
- Large VGA Display (640 x 480)
- Display Resolution Settings: 130, 259, 517 data points
- 5-Segment Limit Line
- Printer Driver Compatibility with Epson, Canon, Citizen, and HP
- Field Replaceable Battery-NiMH
Applications
Wireless Network Field Measurements
- Cable and Antenna testing for VHF, broadcasting, paging, cellular, PCS/GSM, 3G, ISM, WLAN and WLL applications
- Return Loss measurement
- Distance-To-Fault measurement
- Cable loss measurement Tower Mounted Amplifier Testing
- Enables two port gain/loss measurement with selectable power output and an optional built-in BiasTee Wireless Network Field Measurements
- Antenna isolation measurement is easily tested with >90 dB dynamic range
SPECIFICATIONS
- Frequency Range: 625 to 2500 MHz
- Frequency Accuracy: (CW mode) 75 ppm
- Frequency Resolution: 10 kHz
- Display Resolution: 130, 259, 517 data points
- Sweep Rate Typical values w/calibration: 25 ms/data points
- Immunity to Interfering RF Signals up to*: 2 +10 dBm, RF out +30 dBc, RF in
- Return Loss: Range: 0 to 54 dB Resolution: 0.01 dB
- SWR: Range: 1 to 65 Resolution: 0.01
- RF Source Frequency Power Output (nominal): 625 to 2500 MHz at 10 kHz step Selectable, –30 dBm or +6 dBm
- Insertion Loss/Gain: Range: –120 to 100 dB Resolution: 0.1 dB
- Distance-to-Fault Vertical range: Return loss: 0 to 54 dB SWR: 1 to 65 Horizontal range (meter): 0 to (data points x resolution), (where data points= 128, 256, 512) Horizontal resolution, (rectangular windowing) (meter): (1.5 x 108) (Vρ)/ Δ frequency*3
- Cable Loss: Range: 0 to 54 dB Resolution: 0.01 dB
- Test port connector: Precision N female
- Maximum input without damage: N(f) test port: +22 dBm RF power detector: +20 dBm, 50 Ω
- Trace memory: up to 200
- Instrument configuration with calibration: 10
- Custom cable configuration: 50
- Temperature: Operating: 0 to 50°C, Storage: –20°C to 75°C
- Weight: 1.81 kgs (4.0 lbs.)
- Size: 25.4 x 17.8 x 6.10 cm (10 x 7 x 2.4 in.)
- General: Electromagnetic compatibility: Meets European community requirements for CE marking. RS232: 9 pin D-sub, three wire serial