HP Cable Box 8591C manual Auto ALL, Using 0 dB Attenuation

Making Basic Measurements Using Spectrum Analyzer Mode

Measuring Low-Level Signals Using Attenuation, Video Bandwidth, and Video Averaging

6.Press (AMPLITUDE), ATTEN AUTO MAN . Press the step-up key (m) once to select 20 dB attenuation. Increasing the attenuation moves the noise floor closer to the signal

A “#” mark appears next to the AT annotation at the top of the display, indicating the attenuation is no longer coupled to other spectrum analyzer settings.

7.To see the signal more clearly, press 0 Idemv]. Zero attenuation makes the signal more visible. (As a precaution to protect the spectrum analyzer’s input mixer, 0 dB RF attenuation can be selected only with the number/units keypad.)

14. 50 13 JUL 23, IQ93

b		MKR 100 15	MHZ
REF : .8 dml”	#AT 0 dB	-2.20	dBmV

PEAK

LOG

10

dB/

ATTEN

^.^

REF L”L

m

AUTO Mx

WA SI

SC FI

COW

Figure 4-16. Using 0 dB Attenuation

Before connecting other signals to the spectrum analyzer input, increase the RF attenuation to protect the spectrum analyzer’s input mixer: press

ATTEN AUTO MAN so that AUTO is underlined or press (AUTO COUPLE) and

AUTO ALL.

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