BTS Master care and preventive maintenance consist of cleaning the unit and inspecting and cleaning the RF connectors on the instrument and all accessories. Clean the BTS Master with a soft, lint‑free cloth dampened with water or water and a mild cleaning solution.
Caution
To avoid damaging the display or case, do not use solvents or abrasive cleaners.
Connector Care
Clean the RF connectors and center pins with a cotton swab dampened with denatured alcohol. Visually inspect the connectors. The fingers of N(f) connectors and the pins of N(m) connectors should be unbroken and uniform in appearance. If you are unsure whether the connectors are undamaged, gauge the connectors to confirm that the dimensions are correct. Visually inspect the test port cables. Test port cables should be uniform in appearance, not stretched, kinked, dented, or broken.
To prevent damage to your instrument, do not use pliers or a plain wrench to tighten the Type‑N connectors. The recommended torque is 12 lbf · in to 15 lbf · in (1.36 N · m to 1.70 N · m). Inadequate torque settings can affect measurement accuracy. Over-tightening connectors can damage the cable, the connector, the instrument, or all of these items.
Visually inspect connectors for general wear, cleanliness, and for damage such as bent pins or connector rings. Repair or replace damaged connectors immediately. Dirty connectors can limit the accuracy of your measurements. Damaged connectors can harm the instrument. Connection of cables carrying an electrostatic potential, excess power, or excess voltage can damage the connector, the instrument, or both.
Connecting Procedure
1. Carefully align the connectors. The male connector center pin must slip concentrically into the contact fingers of the female connector
2. Push connectors straight together. Do not twist or screw them together. A slight resistance can usually be felt as the center conductors mate.
3. To tighten, turn the connector nut, not the connector body. Major damage can occur to the center conductor and to the outer conductor if the connector body is twisted.
4. If you use a torque wrench, initially tighten by hand so that approximately 1/8 turn or 45 degrees of rotation remains for the final tightening with the torque wrench.
Relieve any side pressure on the connection (such as from long or heavy cables) in order to assure consistent torque. Use an open‑end wrench to keep the connector body from turning while tightening with the torque wrench.
Do not over-torque the connector.
Disconnecting Procedure
1. If a wrench is needed, use an open‑end wrench to keep the connector body from turning while loosening with a second wrench.
2. Complete the disconnection by hand, turning only the connector nut.
3. Pull the connectors straight apart without twisting or bending.
ESD Caution
The MT8220T, like other high performance instruments, is susceptible to ESD (electrostatic discharge) damage. Coaxial cables and antennas often build up a static charge, which may damage the MT8220T input circuitry (if allowed to discharge by connecting directly to the MT8220T without previously discharging the static charge). MT8220T operators must 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. Because these apply to the MT8220T, Anritsu Company recommends that any static charges that may be present be dissipated before connecting coaxial cables or antennas to the MT8220T. This may be as simple as temporarily attaching a short or load device to the cable or antenna prior to attaching to the MT8220T. Remember that the operator may also carry a static charge that can cause damage. Following the practices outlined in the above standards ensures a safe environment for both personnel and equipment.
RF Input Warning
The BTS 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 +30 dBm (±50 VDC) and could be less if additional features, such as a preamplifier, are in use. Be sure to 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.
Battery Replacement
The battery can be replaced without the need for any tools. The battery compartment is located on the lower left side of the instrument, with the measurement display facing you. Slide the battery door down, towards the bottom of the instrument. To remove the battery pack, pull straight out on the battery lanyard.
Battery Compartment Door
Warning
To avoid damage, use only Anritsu approved batteries, adapters, and chargers with this instrument.
The battery that is supplied with the BTS Master may need charging before use. The battery can be charged while it is installed in the BTS Master by using either the AC-DC adapter or the 12‑Volt DC adapter, or outside the BTS Master with the optional Dual Battery Charger. Refer to Symbols and Indicators for a description of battery symbols.
Caution
When using the Automotive Adapter, always verify that the supply is rated for a minimum of 60 Watts at 12 VDC, and that the socket is clear of any dirt or debris. If the adapter plug becomes hot to the touch during operation, discontinue use immediately.
Note
Use only Anritsu Company approved batteries, adapters, and chargers with this instrument. Anritsu recommends removing the battery for long‑term storage of the instrument.
