S820E Microwave Site Master™ User Guide : General Information : Instrument Care and Preventive Maintenance
Instrument Care and Preventive Maintenance
Site Master preventive maintenance consists of cleaning the instrument and inspecting and cleaning the RF connectors on the instrument and all accessories. Clean the Site Master with a soft, lint‑free cloth dampened with water or water plus a mild cleaning solution.
To avoid damaging the display or case, do not use solvents or abrasive cleaners.
Clean the RF connectors with a cotton swab dampened with denatured alcohol. Visually inspect the connectors. If you are unsure whether the connectors are undamaged, then gauge the connectors to confirm that the dimensions are correct.
Carefully inspect the test port cable. The cable should be uniform in appearance, and not stretched, kinked, dented, or broken. A defective test port cable is the most common cause of unreliable or erratic measurements. Extra care should be exercised to ensure that the test port cable remains in good condition.
ESD Caution
The Site Master, like other high performance instruments, is susceptible to electrostatic discharge (ESD) damage. Coaxial cables and antennas may build up a significant static charge, which may damage the Site Master. To prevent ESD damage, you are advised to connect a short to either end of the cable before connecting the cable to the Site Master. If no short is available, then a termination (load) may be used. Site Master operators must always be aware of the potential for ESD damage and take all necessary precautions. Operators should exercise practices outlined within industry standards such as JEDEC‑625 (EIA‑625), MIL‑HDBK‑263, and MIL‑STD‑1686; which pertain to ESD and ESDS devices, equipment, and practices. Remember that the operator may also carry a static charge that can cause damage. Following the practices outlined in the above standards will ensure a safe environment for both personnel and equipment.
RF Input Warning
The Anritsu Site Master is a sensitive measuring instrument designed to measure low power levels. Avoid damaging this sensitive circuitry by observing the maximum input levels printed on the instrument connector labeling and specified in the product technical data sheet.
Typical maximum input is +23 dBm (±50 VDC). The maximum RF input could be less if additional features, such as a preamplifier, are in use. Review the product technical data sheet or Anritsu website for recommended components and accessories that can help you protect your instrument. These include a variety of adapters, attenuators, filters, and RF detection accessories.
Calibration and Annual Verification
The Cable and Antenna Analyzer requires user‑performed calibration before making measurements. Calibration can be quickly and easily performed using several calibration options. Calibration components are sold separately. Refer to Calibration, CAA for additional information.
Anritsu recommends allowing the S820E to warm up for 10 minutes to typical operating temperature before calibrating. The instrument will require a new calibration if the internal instrument temperature changes more than ±10 ºC after calibration.
Anritsu recommends an annual calibration and performance verification of the Site Master by local Anritsu service centers.
The Site Master is self‑calibrating and there are no field‑adjustable components. The external calibration components are crucial to the integrity of the user calibration. As a result, they must be verified periodically to ensure performance conformity. This is especially important if the calibration components have been accidentally dropped or over‑torqued.
Contact information for Anritsu Service Centers is available at: