CMD80是種能夠?qū)DMA AMPS D-AMPS(TDMA)和TACS等各種類型移動(dòng)站進(jìn)行測(cè)量的測(cè)試儀器。在進(jìn)行射頻參數(shù)測(cè)量時(shí)，它可仿真移動(dòng)站的真實(shí)工作環(huán)境，如模擬為三模式/雙頻段基站與移動(dòng)站建立通話并在DUT處于正常通話狀態(tài)下(非專門測(cè)試模式)時(shí)進(jìn)行各項(xiàng)測(cè)量?jī)x器可支持下列網(wǎng)絡(luò)和頻率波段:高測(cè)量速度以及遠(yuǎn)程控制功能，(通過(guò) IEC/IEEE總線)CMD80使得測(cè)試儀適于在生產(chǎn)測(cè)試中使用儀器的高測(cè)量更是用于移動(dòng)站開發(fā)研制所必需的特性。

CMD80技術(shù)指標(biāo)
Signalgenerator
Frequency range, US Cellular 869MHz to 894MHz
Powermeasurement(feference level range)
RF IN/OUT (fullscale) +41 dBm to -28 dBm
RF IN2 (fullscale) 0 dBm to -69 dBm
Dynamic range 50dB below reference level
Demodulator O-QPSK
Modulation measurements signal quality(p)
  phase error
  magnitudeerror
  error vector amplitued
  carrier feedthraough
  I/Qimbalance
  cqrrier frequency error
  transmission error
DCvoltoge measuremints Range 0 V to ±30V
DCcurrent measurements Range 0 A to ±10A
SignallingDigital modes 1595,UB-IS95,J-STD008,T53
D-AMPS;optionCMD-B84    
  RF OUT2 +3 dBm to -112dBm
Modulation π/4DQPSK or unmodulated
Analyzer  
Powermeasurement(referene level range)  
RF IN/OUT(fullscale) +39dBm to -60 dBm
RF IN2(full scale) -2dBm to -100 dBm
Power ramp  
Adjacent-channel power  
Modulationmeasurements phase error
  magnitudeerror
  error vector amplitued
  carrier feedthraough
  I/Qimbalance
  cqrrier frequency error
Bit error rate measurement  
SignallingDigital modes IS 136,IS54
RF signal generator  
Frequency range  
AMPS 869MHz to 894MHz
N-AMPS 869 MHz to 894MHz
TACS 935 MHz to 960MHz
J-TACS 860MHz to 870MHz
E-TACS 917 MHz to 950MHz
N-TACS 843 MHz to 846MHz
  863.5MHzto 867MHz
Output level  
RF IN/OUT -20 dBm to -124 dBm
RFIN2 0 dBm to -105 dBm
FM modulation  
RF analyzer  
Frequencyrange  
AMPS 824 MHz to 849 MHz
N-AMPS 824 MHz to 849 MHz 
TACS 890MHz to 915 MHz
J-TACS 915 MHz to 925 MHz
E-TACS 872 MHz to 905 MHz 
N-TACS 898 MHz to 901 MHz 
  918.5MHz to 922 MHz
Referenec level  
RF IN/OUT 0 dBm to +41 dBm
RFIN2 0 dBm to -69 dBm
FM demodulation  
Signaling analog signalling AMPS(IS95)
  NAMPS,TACSMJ/E/N-TACS
Audiosource  
Frequency 50 Hz to 4kHz(single tone)
Output voltage Range 0.1mVto 5V,rms
AF analyzer  
Measurements frequency
  AC voltage
  THD