After you enter the ethernet address you want to use (i.e. 10.0.0.2) you must restart the unit on a live ethernet connection. You can use the crossover cable to connect to your computer's ethernet port as a live port, but only if you are assigning an address. If you use the DHCP (dynamic host control protocol), you must hook to a live ethernet connection that allows for DHCP requests.
The channel value is used in conjunction with a signal standard such as CDMA to easily tune to a particular channel number associated with that channel. The user doesn't need to know the frequency of a particular channel, just the channel number for a particular air interface standard.
Yes, with limitations. A spectrum analyzer can be used to measure the noise figure of a device with a significant amount of gain. The basic method is to start by measuring the noise floor of the instrument with a termination on the input. It is best to do this with attenuation set to 0 dB and the preamplifier turned on with a high averaging value (say, 100 or more). Turn on a marker along with a delta marker and set the marker type to FIXED. Next, connect the ampifier to be measured to the spectrum analyzer's input and move the termination to the input of the amplifier. Restart averaging and wait for the averaging to complete. The delta marker value will be the noise figure of the DUT plus the spectrum analyzer's noise figure divided by the gain of the amplifier. This method isn't suitable for low gain devices because of the "second stage contribution" of the spectrum analyzer.
The position accuracy is approximately +/-6 meters under ideal conditions. This is not a specification, just characteristics. The actual accuracy depends on the number of satellite signals being received and their position in the sky. The more satellites and the farther apart they are in the sky, the better the accuracy. Our GPS receiver does not use the WAAS enhancement to GPS.
Approximately +/- 20 Meters but this is not specified.
The presence of large signals, even if they are outside of the span range to which the instrument is set can cause mixer saturation and generate a warning so the user knows that measurement accuracy may be compromised. Increase input attenuation to reduce the amplitude of the signal into the instrument's circuits.
Sweep time is affected by the RBW, the VBW, the number of markers and the detector type. Use a wide video bandwidth, a relatively wide resolution bandwidth, turn off all markers and select the sample detector for the fastest sweep time. Also, use the minimum span to make the required measurements.
While you are creating a limit line (aka spectral mask) set the limit line type to "Relative" in the Limit Advanced menu. Save the limit line with the name of your choice. When you recall that limit line it will be set to whatever the center frequency of the instrument is. If you saved a limit line as an Absolute limit line it will be recalled to the frequency at which it was created. If that is your case, go to the Limit Move menu and press the "Move Limit to Current Center Freq" soft key.
The MS272xB, MS271xB and MT8222A have three traces available. The best way to see the maximum and minimum simultaneously is to set Trace A to Normal, Trace B to Max Hold and Trace C to Min Hold.
For all detector types except Sample, the instrument makes enough measurements for each display point that there are no gaps in the frequency coverage. The Sample detector only makes one measurement per display point so gaps do occur if the resolution bandwidth is less than 1/551 of the span.
The field strength measurement algorithm in the MS272xB, MS271xB, MT8222A, MS2711D and S332D takes the antenna factor of the selected antenna into account to calculate field strength. This causes the increase you see over the bandwidth of the antenna. Measurements of field strength are only valid in that region since the performance of the antenna outside of its specified bandwidth isn't known.
There are two basic ways to stabilize the display. It depends on the circumstances, as to which one is better. You can set the instrument to trigger a sweep based on an amplitude value, such as overshoot at the start of a pulse. If an external trigger signal is available, that is probably the easiest way to get a stable display. For the MS272xB, MS271xB and MT8222A, access the menu to set these things up using | Shift | Sweep | Trigger Type |. A possible third way is to adjust the sweep time to attempt to match the repetitation rate of the signal you are measuring. The sweep time can be adjusted in 1 microsecond steps.
No, the instrument is calibrated on the production line to make accurate measurements of signals. Variations in the noise floor merely show changes in the sensitivity of the instrument, not in the accuracy.
An Absolute limit line is one that, when recalled from memory, returns to the frequency at which it was created. A Relative limit line, when recalled, is automatically centered on the spectrum analyzer's current center frequency. If your measurements are always at one frequency than using Absolute limit lines is sensible. If you make measurements at many different frequencies then Relative limit lines make your job easier because when you create a limit line (also called emission mask) once, you can use it at any desired frequency without having to recreate it each time.
Use the Peak detector most of the time. This choice displays the largest measured value for each of the 551 display points. Use the RMS detector if you are measuring noise or noise-like signals such as a CDMA Bart's head. Use the Negative detector to display the smallest measured value for each display point. This is useful when attempting to pick out signals that are near the noise floor. Use the Sample detector when using the tracking generator. There is one measurement made for each display point. Use the Quasi-peak detector if you are doing EMC measurements following the CISPR standards.
No, that capability is not included in the instrument.
The counter marker shows the frequency of the signal to 1 Hz resolution. The normal marker displays the center of the measurement bucket in which the particular peak lies.
The noise marker switches the detector type to RMS and normalizes the measured noise to a 1 Hz bandwidth. The value is reported in dBm/Hz. As the name implies this detector is best used when measuring noise or noise-like signals.
The choice of fixed or tracking markers come into play when you are using delta markers. When you select FIXED markers, the reference marker will be fixed at the amplitude it was at when you turn on the delta marker. This is useful when you want to track the tuning of a signal or filter. The delta marker will show you the change in amplitude compared to the starting value. The tracking marker will change amplitude as the amplitude of the signal changes. This is typically used when you want to know the relative amplitude at different offsets from a carrier and the amplitude of the carrier isn't fixed (such as an over-the-air measurement).
The GPS coordinates delivered by the instruments are based on the WGS84 methodology of determining position. WGS stands for World Geodetic System and is the method employed by the GPS satellite system to determine position.
