Specifications

University of Hertfordshire
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2.1.3 HP 8591 EM Spectrum Analyser
HP 8591 EM Spectrum Analyser is provided in the Telecommunication Lab (D416) of the
University of Hertfordshire. The Hewlett Packard (HP) 8591EM is a stand-alone, automated EMC
pre-compliance analyser that reduces the time it takes to find, measure and document radiated and
conducted EMI emissions. It belongs to the 8590EM series of EMC analysers, which do not require
an external computer and automation software to perform automated EMC measurements. With an
upper frequency of 1.8 GHz, the 8591EM can perform pre-compliance tests on products with clock
frequencies up to 108 MHz. The 8591EM has two modes of operation: EMI analysis and spectrum
analysis. With the press of a key, this analyser converts from EMC analyser to full-function
Spectrum Analyser for use in a wide variety of non-EMC applications. (8591 EM EMC Analyzer, 9
KHz to 1.8GHz, 1995)
Figure 2.1: HP 8591 EM Spectrum Analyser
Frequency Specifications of HP 8591 EM Spectrum Analyser

Frequency Range: 9 kHz to 1.8 GHz

Frequency Sweep Time: Span 0 Hz, >1 kHz: 20 µs to 100 s

Resolution Bandwidths: 30 Hz to 3 MHz (1, 3, 10 sequence) 200 Hz, 9 kHz, 120 kHz and 1
MHz (6 dB) EMI bandwidths
 Video Bandwidth Range: 1 Hz to 1 MHz in 1, 3, 10 sequence
Amplitude Specifications

Amplitude Range: Displayed average noise level to +137 dBµV

Maximum Safe Input Level (Input attenuator set at > 10 dB)
Average Continuous Power: +30 dBm
Peak Pulse Power: +30 dBm
DC: 25 Vdc