MS8604A
Digital Mobile Radio T ransmitter T ester
100 Hz to 8.5 GHz
High-Speed Tester for NADC/PDC/PHS
Burst Modulation Accuracy Measured in Under ONE Second
The MS8604A is a full-featured digital mobile transmitter tester for evaluating the major characteristics of transmitters ud in the North-American Digital Cellular Systems (NADC), Japan's digital mobile telephone (PDC: Personal Digital Cellular) system and by cordless telephones (PHS: Personal Handy Phone System). It covers frequencies from 100 Hz to 8.5 GHz, and measures spuri-ous emissions over a broad frequency range. It can also measure RF signals directly up to 10 W (average burst power) and ba-band devices can be evaluated using its
I/Q signal input function (option).
The MS8604A is ideal for high-speed measurement of frequency deviation, spurious emissions, occupied bandwidth, antenna power, leakage power during carrier-off, transmission ramp-up and ramp-down power, modulation accuracy, leakage power of adjacent channel, and signal trans-mission rate of digital mobile transmitters.
In addition to measurements conforming
to EIA/TIA, ETSI, RCR, and MKK standards,DSP (digital signal processing) and high-speed measurement function bad on a unique measurement algorithm combine to greatly reduce the time required for manu-facturing and inspecting transmitters.
PTA functions enabling free programming of test procedures are provided as a standard feature.
• Major transmitter functions evaluated by single system
• Compatible with NADC/PDC/PHS systems (compatibility with single system provided as standard; optional expansion to all three systems)
• High-speed measurement (under 1 cond for modulation-accuracy measurements)
• Input up to 10 W (internal 20 dB attenuator and power meter for high power levels)
• Superior operability
• I/Q signal input (option)
鸭肫怎么读Fast, Accurate Measurement of Digital Modulated Signals
A unique high-speed measurement method is available for measuring occupied band-width and leakage power of adjacent channel in addition to RCR (Rearch & Development Center for Radio Systems) standards and Specifications for the type approval test of the Ministry of Posts and T eleco
mmunications of Japan. For RCR standards, a spectrum analyzer is ud to determine the occupied bandwidth and leakage power of adjacent channel from the burst signal frequency spectrum.
In this method, frequency sweeps must be performed slowly to obtain an accurate burst wave spectrum, so measurement speed falls. For example, more than 10 conds are required when measuring PDC. With Anritsu's unique measurement method, digital signal processing is ud to compute the frequency components from a single burst signal waveform, and the occupied bandwidth and leakage power of adjacent channel are computed from the results. Measurement times of 2 conds and less are possible for PDC transmitters.
Unique High-Speed Measurement Method MS8604A
Evaluation of Digital Mobile Transmitters
Automated Measurement by Simple key Operations
Quick Configuration for Different Communication Systems
Measurement software for one communication system is provided as a standard feature; others can be added as options. When the options are chon, the communication system can be lected by pressing a single key.
Measurement of Frequency, Modulation Accuracy, Signal T ransmission Rate
Both absolute frequencies and deviations can be read directly. Measurement of modulation accuracy includes both vector errors within burst signals, amplitude errors,pha errors, origin offt and droop factors, and
vector errors for first ten symbols immediately following startup. T en-burst averages and signal transmission rates can also be measured.
Measurement of Antenna Power and Leakage Power during Carrier-Off
At measurement of burst signal antenna power, the power-on intervals are auto-detected bad on the
modulated wave, so an external synchronization trigger is not needed. In addition, the average power during power-on intervals is automatically matched to a tem-plate value, simplifying measurement automation. Any template can be t, and three types can be stored.The leakage power during carrier-off can be measured as either an absolute value or as an on/off ratio.
When the carrier-off power is low, measurements can be performed in a wide-dynamic-range mode (during
single-mode measurements with synchronizing word).
One-T ouch Selection of Measurement Items法克u
Measurement items can be lected by pressing a single key . The input connector (RF/IQ), maximum input power ,and type of signal for measurement (uplink/downlink,number of slots per carrier , channel number/frequency , frequency steps, synchronizing words, root Nyquist filter switching) can be pret. In particular , synchronizing words can be predefined to any value. Measurement can be performed in either the single-measurement mode (one measurement performed each time key presd), or in the automatic continuous repeat mode.
Example of burst ri characteristics (PHS)
NORMAL mode
WIDE DYNAMIC RANGE mode
Measurement of Transmission Ramp-up
and Ramp-down Power
Transmission ramp-up and ramp-down power can be measured simultaneously with antenna power measure-ments. In addition, the marker points can be moved and the marker point symbol power can be read directly.
Measurement of Leakage Power of Adjacent Channel Urs can lect either a standard mode using
spectrum-analyzer methods, or a high-speed mode torepsol
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reduce measurement time.
Measurement of Occupied Bandwidth
Urs can lect either a standard mode using
spectrum-analyzer methods, or a high-speed mode to
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reduce measurement time.
Measurement of Spurious Emissions
Up to 15 spurious measurement frequencies can be
stored in one memory table and three memory tables
are provided. In addition, a function is provided for
睡帽automatic measurement of the highest level within
a ±500 kHz range of a specified frequency. By using
big manspectrum-analysis functions, spurious emissions can be
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detected over a wide frequency range.
• Measurement Times新年贺词 英文
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Note: Measurement times are for continuous measurement under identical conditions and ttings.
