CMD55: Compact unit for testing GSM (Global System for Mobile communications), PCN (DCS 1800), and PCS (PCS 1900) mobiles; Combines small dimensions with high measurement accuracy and speed; Optional GPIB; High-contrast backlit LCD screen with large characters and simultaneous indication of all settings and results; Call for further specifications on the CMD55. Available Options:
Opt. - B1 - OCXO reference oscillator, Cannot be ordered with opt. B2.
Opt. - B17 - I/Q signals from the CMD monitor and burst trigger signals.
Opt. - B19 - GSM1900 mobile and base station test. (for CMD55 as of serial # 837176)
Opt. - B2 - High stability OCXO, Cannot be ordered with opt. B1.
Opt. - B20 - GSM-specific voltage and current measurement. Standard with CMD55.
Opt. - B3 - Multifrequency reference input / output.
Opt. - B30 - High-level RF output / sensitive RF input. Standard with CMD55.
Opt. - B4 - Fast power ramp, phase/frequency error & BER measurement. Required for options B41, B42, B43, B44, and K43.
Opt. - B41 - Includes audio frequency (AF) generator, voltmeter, distortion meter, and frequency counter. Requires option B4.
Opt. - B42 - High dynamic range burst analyzer. Requires option B4.
Opt. - B43 - Carries out GSM measurements of spectrum due to switching and modulation according to the GSM, GSM1800, & GSM1900 recommendations faster than any spectrum analyzer. Requires opt. B4 and B42.
Opt. - B44 - Audio multitone option based on DSP techniques. Requires opt. B4 and B41
Opt. - B51 - Internal GSM full rate (FR) and enhanced full rate (EFR) speech coder / decoder.
Opt. - B6 - Adapters for B6x options. Required for options B61 and B62.
Opt. - B61 - IEC / IEEE 488-bus interface. Requires option B6.
Opt. - B62 - Memory card interface. Requires option B6.
Opt. - K43 - Narrowband spectrum analyzer. Requires option B4
Opt. - K80 - Frequency extension option. Requires option U10.
Opt. - U1 - Upgrade to GSM multiband functionality. Some mobiles require option U20 to ensure correct dual-band handover operation.
Opt. - U10 - 8MB memory extension for CPU1 or CPU2. Only for older versions.
Opt. - U11 - High speed processor including 8MB RAM. Only for older versions.
Opt. - U12 - Modification for fast BER (burst by burst) capability.Only for older versions
Opt. - U13 - 10dB higher sensitivity at RF input/output N connector. Only for GSM signals.
Opt. - U18 - Output level of -15dBm for RF input/output N connector. Only for GSM signals.
Opt. - U19 - GSM1900 mobile test. For CMD55 with serial # as of 837176.
Opt. - U20 - Special RF converter that enables handover between GSM900 and GSM1800/1900 while maintaining the BCCH in the band the handover was initiated. Standard in CMD55 current version.
Opt. - U5 - GSM time synchronization signal and demodulated I and Q signals are copied from the multifunction connector to three BNC connectors at the rear panel. Not compatible with unit upgrades of option U56. Factory upgrade.
Opt. - U56 - Upgrade to support DECT for CMD55 multiband testers. Factory installation. Not compatible with option U5.
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