GPRS Option

GPRS system option supporting asynchronous and synchronous measurements. The option supports the GSM 850, GSM 900, EGSM, GSM-R, GSM 1800 and GSM 1900 systems. In synchronous mode the option supports the simulation of a GPRS cell site with many optional parameters.

Signaling supported: location updating, GPRS attach/detach, GPRS test mode (required for TX and RX testing), channel change/handover (within frequency band and interfrequency band).
Supported measurements: MS Power, Phase/Frequency error, BLER-BCS, BLER-USF, multislot measurements.

GPRS-specific Options

• ACPM (ORFS) Option
  The adjacent channel power meter (ACPM) option adds the spectrum measurement capabilities to the 4400 series. ACPM distinguishes two different measurements: spectrum due to modulation and spectrum due to switching transients.
  
  
• AM Signal Generator Option
  The AM Signal Generator Option provides an AM signal generator to the 4400 series.
  Output power level: -10 dBm
  Modulation frequency range: 1 to 50 kHz
  Modulation depth: 50 to 90%
  
  
• RAPID! Service Tests for 4400-GSM
  Automatic service tests written under RAPID! the 4400 series programming language for test automation. Tests include single- and dual-band tests of GSM 850/900/1800/1900 mobile phones. Configuration allows for automatic detection of attenuation losses with the help of a golden mobile phone.
  
  
• Audio Option
  The audio option adds basic audio functionality to the 4400 Series: Direct connection of microphone and loudspeaker; the built-in generator stimulates the loudspeaker or microphone of the mobile phone; frequency, voltage, distortion and SINAD measured at the same time; spectrum analyser displays audio frequency spectrum; Multitone generation via wave files.
  
  
• Basic Codec Option
  The basic codec adds the full rate speech codec functionality to the audio option.
  
  
• Codec Extension Option
  The codec extension adds the enhanced full rate speech codec functionality to the audio option.
  
  
• Parallel Multiple Phone Test Option
  The Parallel Multiple Phone Test Option allows connection of multiple phones to a 4400. The phones are tested sequentially in order to reduce setup time. This option is ideally combined with the 4940 Bi-directional RF port (4-port).