RF switch matrix/front end that is easy to adapt to the RF interface of the device under test (DUT):

• RF1: Input/output connected to a high-power BTS

• RF2: Input/output connected to a medium/low power BTS

• RF3 OUT: High power output

• RF4 IN: Sensitive input

RF Analyzer 100 KHz – 2.7 GHz:

• Selective power meter

• Spectrum Analyzer with Selectable Resolution Bandwidth (RBW) and Trigger & Timing (10 MHZ – 2.7GHz)

• Time domain measurement (zero-span mode)

RF Signal Generator 100 KHz – 2.7 GHz:

• Generate continuous wave (CW)/single sideband (SSB)/amplitude modulation (AM) signals

Additional Features:

• IEEE interface

• RS-232-C interface

• 2 PCMCIA slots

• Reference frequency input/output on the rear panel

• New and proven operation

GSM/EDGE based on high-resolution TFT color display

• Non-signaling mode

This mode is especially useful for testing RF boards/modules with non-signaling behavior. The measurement is completely independent of external trigger signals or signaling information from the outset. As soon as power is added to the instrument’s input, the tester begins sampling the incoming RF signal. Once the corresponding RF parameters have been calculated and displayed, the instrument is ready for the next measurement. The CMU300 supports the measurement of all transmission parameters specified by the GSM/EDGE specification under the corresponding modulation mode and training sequence (midamble). In addition, the CMU300 is capable of generating GSM/EDGE signals with corresponding training sequences (midamble) and modulation patterns in the frequency range from 10 MHz to 2.7 GHz. There is no link between the functions of the analyzer and the generator, that is, there can be arbitrary channel spacing between the signal of the uplink and the signal of the downlink.

• Signaling mode

Test modules or base stations that support some level of signaling will use signaling mode. In this mode, the tester operates synchronously with the BTS, i.e. it is synchronized with the TDMA frame structure, which is extremely important for receiver bit error rate measurements. All receiver parameters can be tested individually for each time slot. THIS FEATURE IS NECESSARY TO TEST BASE STATIONS THAT SUPPORT BOTH GSM AND EDGE. The ability to encode/decode channels in real time is the basis for simultaneous measurements. The instrument can be synchronized with the base station in the following ways:

º If the base station transceiver (BTS) has a multi-frame clock output, this signal can be used to trigger the CMU300. An additional trigger line must also be taken into account. For BER testing and EDGE TX testing, a 26 multiframe trigger is required.

º If only the RF interface is used, the tester can be synchronized with the C0 carrier of the base station, just like a mobile phone. This simplifies the test setup. However, a CCH carrier (including FCCH/SCH channels and system information1 to 4) must be activated before the service channel used can be measured. After a successful synchronization, there is a continuous resynchronization of the SACCH with the TCH.

WCDMA

Power Measurement:

• Power meter (broadband or frequency selective)

• Code Field Power (CDP)

Modulation Analysis:

• Error vector amplitude (EVM), amplitude error, phase error

• Carrier frequency error

• IQ origin offset

• IQ imbalance

• Waveform quality

• Peak Code Field Error Power (PCDEP)

Spectrum Measurements (In-Band):

• Adjacent Channel Leakage Power Ratio (ACLR)

• Occupied bandwidth (OBW)

• Spectral Radiation Template (SEM)

UL Signal Generators

For sensitivity measurements on WCDMA Node B, the CMU300 supports all reference measurement channels (RMCs) as defined in the specification (3GPP TS 25.141 FDD). With its own RF generator, the CMU300 provides the following features:

• Real-time signal generation, including measurement sequences up to PN (Pseudo-Random Noise)16 for continuous receiver measurements, enabling easy execution of wireless sensitivity search procedures.

• Supports a specified data rate of 2 Mb/s (RMC 2048 kbps) to test the data rates already achieved for the intended application: test for tomorrow’s applications today!

• AWGN generator function and BER simulation

Special features of WCDMA signaling mode

• Synchronous TX parameter testing

• BCH real-time analytics

• Data analysis of downlink channel/extended BER test capabilities

• RACH testing (including AICH analysis)

• HS-SCCH monitoring

• HS-DSCH data rate and throughput measurements

• HS-DPCCH uplink simulation

• HSDPA simulation and inspection applications