HP 8591E spectrum analyzer 1.8 GHz 004 021 101 102 130 Spectrum analyzer Hewlett Packard 8591E Frequency range 9 kHz .. 1.8 GHz Resolution bandwidth 30 Hz .. 3 MHz Has options 004 Oven timebase 021 HPIB interface 101 Fast ADC 102 Demodulation, TV 130 Narrow bandwidth Has splitscreen, FFT demodulation, AM/FM Hewlett Packard Agilent Keysight