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| Available Options | Option 004 -Precision Frequency Reference Option 021 - HPIB / GPIB Option 041 - GP-IB Interface and Parallel Printer Interface Option 105 - Time-Gated Spectrum Analysis Option 130 - Narrow Resolution Bandwidths (30 Hz,100 Hz,300 Hz and 200 Hz EMI) Option 151 - DSP, Fast ADC, and Digital Demodulator Option 163 - GSM900/DCS1800 Firmware |