CRTU-RU Rohde & Schwarz Communication Analyzer Used

Protocol Test from R&D to Certification

Covers the entire range of GSM/(E)GPRS and WCDMA/HSPA protocol measurements required from the beginning to the end of your project:

• Providing examples for quick implementation of your own specific test senarios needed for early R&D testing
• Verified and validated test cases for compliance testing and pre-certification
• GCF and PTCRB approved test cases for conformance testing and certification

Modular Concept

The protocol testers of the R&S® CRTU family are based on a flexible modular concept that covers 2G and 3G (WCDMA, HSPA) test requirements. The R&S® CRTU is a future-proof investment, as the base units can be adapted to new test requirements.

Scalability

Built-in scalability, so that existing GSM/(E)GPRS test systems can be expanded to WCDMA/HSPA test systems and vice versa.

Comprehensive Test Cases

Supplies all certification related test cases and features at a very early stage:

• 2G and 3G test cases drafted by 3GPP from TS 51.010, 34.123 and 34.121
• Application Enabler test cases drafted by OMA and IMTC

Full Automatic Test Sequences

Flexible concept for the automatic execution of test sequences:

• Define test sequences and run them automated
• Remote control your device under test from the test case for completely unattended automated testing

The R&S®CRTU family of protocol testers provides powerful and comprehensive functionality for the design and verification of protocol stacks. This family of testers covers an extensive range of applications and meets even the most exacting demands. The protocol testers R&S®CRTU-G/S and R&S®CRTU-W/M cover the entire range of GSM/(E)GPRS and WCDMA/HSPA protocol measurements required from the beginning to the end of a development project.

Supported Technologies

• WCDMA/HSPA
• GSM/GPRS/EDGE
• GSM-R
• MBMS
• A-GPS
• MMS
• PoC
• SUPL
• IMS
• GAN

Timebase OCXO 

• Max. frequency drift in temperature range +5 °C to +45 °C: ±5 × 10^-9, referred to +25 °C
• Max. frequency drift with instrument orientation ±3 × 10^-9
• Referred to turn-off frequency after 2 h warm-up time following a 24 h off time at +25 °C: ±5 × 10^-9
• Max. aging: ±3.5 × 10^–8 /year; ±5 × 10^-10/day after 30 days of operation
• Warm-up time at +25 °C: approx. 10 min

Reference frequency inputs/outputs 

Synchronization input: BNC connector REFIN

• Frequency: Sinewave signal: 1 MHz to 52 MHz, step 1 kHz; Squarewave signal (TTL level): 10 kHz to 52 MHz, step 1 kHz 
• Max. frequency variation: ±5 × 10^-6
• Input voltage range-sinewave signal: 0.5 V to 2 V (rms) 
• Impedance: 50 Ω

Synchronization output 1: BNC connector REFOUT1

• Frequency in internal reference mode: 10 MHz from internal reference
• In external reference mode: frequency of synchronization input
• Output voltage: >1.4 V (peak-peak)
• Impedance: 50 Ω

Synchronization output 2: BNC connector REFOUT2

• Frequency in WCDMA mode: 30.72 MHz; In GSM mode: 39 MHz
• Impedance: 50 Ω

Synchronization output 3: BNC connector REFOUT3

• Frequency in WCDMA mode: 15.36 MHz
• Impedance: 50 Ω

RF generator (CW signals) 

• Frequency range: 100 kHz to 2700 MHz
• Frequency resolution: 0.1 Hz
• Frequency uncertainty: same as timebase + frequency resolution
• Frequency settling time: <400 µs to Δf < 1 kHz 

Output level uncertainty RF1, RF2 In temperature range +20 °C to +35 °C

• 10 MHz to 450 MHz, level ≥–106 dBm: <0.8 dB

450 MHz to 2200 MHz

• level ≥–106 dBm: <0.8 dB
• level >–117 dBm (see note 2): <0.8 dB
• level –130 dBm to –117 dBm (see note 2 and note 3): <1.7 dB

2200 MHz to 2700 MHz

• level ≥–106 dBm: <1.0 dB
• level >–117 dBm (see note 2): <1.0 dB
• level –130 dBm to –117 dBm (see note 2 and note 3): <1.7 dB 

In temperature range +5 °C to +45 °C

• 10 MHz to 450 MHz, level ≥–106 dBm: <1.2 dB

450 MHz to 2200 MHz

• level ≥–106 dBm: <1.2 dB
• level >–117 dBm (see note 2): <1.2 dB
• level –130 dBm to –117 dBm (see note 2 and note 3): <1.7 dB

2200 MHz to 2700 MHz

• level ≥–106 dBm
• level >–117 dBm (see note 2): <1.7 dB
• level –130 dBm to –117 dBm (see note 2 and note 3): <1.7 dB
• 10 MHz to 450 MHz, level ≥–106 dBm: <1.7 dB

*Note 2: Not valid at frequencies of netclock harmonics.

*Note 3: Valid for RF1 only.

Output level uncertainty RF3OUT

In temperature range +20 °C to +35 °C

10 MHz to 450 MHz

• level –80 dBm to +10 dBm: <1.0 dB

450 MHz to 2200 MHz

• level –90 dBm to +10 dBm: <1.0 dB

2200 MHz to 2700 MHz

• level –90 dBm to +5 dBm: <1.2 dB

In temperature range +5 °C to +45 °C

10 MHz to 450 MHz

• level –80 dBm to +10 dBm: <1.2 dB

450 MHz to 2200 MHz

• level –90 dBm to +10 dBm: <1.2 dB

2200 MHz to 2700 MHz

• level –90 dBm to +5 dBm: <1.7 dB

• Output level settling time: <4 μs
• Output level resolution: 0.1 dB
• Generator RF level repeatability
• typical values after 1h warm-up time
• output level ≥–80 dBm: <0.01 dB
• output level <–80 dBm: <0.1 dB

Interfaces

• USB: double connector on rear and front panel
• Ethernet 1: RJ-45
• Connector for external monitor (VGA): 15-pin D-Sub
• Serial interface COM1, COM2: RS-232-C, 9-pin D-Sub
• Printer interface LPT: parallel (Centronics-compatible), 25-pin
• Control A (for connection to PU or for R&S®CRTU interconnection): 68-pin high-density connector
• Control B (for connection to PU or for R&S®CRTU interconnection): 68-pin high-density connector
• IF (RX and TX, CH1 and CH2) (four connections to PU): BNC
• Clock (for connection to PU): BNC
• IEC/IEEE bus remote control interface (for connection to PU): 24-pin Amphenol

General Specifications

• Power supply: power factor correction, in line with EN 61000-3-2
• Input: 100 V to 240 V ±10 % (AC), 500 VA, 50 Hz to 400 Hz –5 % to +10 %
• Power consumption: without GSM configuration approx. 160 W; with GSM configuration approx. 200 W

The protocol testers of the CRTU family are based on a flexible modular concept that covers 2G and 3G (WCDMA, HSPA) test requirements. This means that the CRTU is a future-proof investment, as the base units can be adapted to new test requirements.

The core elements of this family are the CRTU radio unit (RU) and the CRTU protocol unit (PU), which can be used in a variety of instrument configurations.

Two standalone testers form the basis for all configurations:

• CRTU-G for GSM/(E)GPRS: CRTU radio unit with two GSM signaling units
• CRTU-W: CRTU radio unit as RF frontend, CRTU protocol unit

One base unit in each case provides two channels (GSM) or cells (WCDMA) that you can configure completely independently of each other. Two more channels/cells can be added for multichannel/multicell tests by simply adding one more CRTU-G/S or CRTU-W/M.

You can also combine the two technologies in one unit: CRTU-GW or CRTU-MS. You can thus run WCDMA/HSPA or GSM/(E)GPRS protocol tests depending on your requirements.

It does not matter whether your existing instrument is an CRTU-G/S or an CRTU-W/M – either tester can easily be upgraded to provide the combined functionality.

Inter-RAT handover tests require at least one CRTU-W and one CRTU-G that must be connected with each other. All test cases prioritized by GCF require two CRTU-G and three CRTU-W units.

Radio resource management is another category that requires test scenarios covering both radio access technologies. The RRM test cases require a spectrum analyzer and a fading simulator in addition to the CRTU-W and CRTU-G protocol testers.