HP 8590 E-Series User Manual page 43

Making a Measurement
Caution
Do not exceed the maximum input power.
The maximum input power for the HP 8590L and HP 85913 is +30 dBm
(1 watt) continuous, 25 Vdc (with 10 dB or more attenuation).
The maximum input power for the HP 85921, and HP 85933 is +30 dBm
(1 watt) continuous, 0 Vdc (with input attenuation of 10 dB or more in
bands 1 through 4.)
The maximum input power for the HP 85943, HP 8594L, HP 85953, or
HP 85963 is +30 dBm (1 watt) continuous and 50 Vdc (ac-coupled) or 0 Vdc
(de-coupled). The input attenuation must be 10 dB or more.
Let's begin using the spectrum analyzer by measuring an input signal. Since the 300 MHz
calibration signal (CAL OUT) is readily available, we will use it as our input signal.
You cannot hurt the spectrum analyzer by using the calibration signal and pressing any
of the keys described in this section. Don't be afraid to play with the knob, step keys, or
number/units keypad. (If you have experimented with other keys and wish to return to a
known state, press the green CPREsET) key.)
1. First, turn the instrument on by pressing ILINE). Wait for the power-up process to complete.
2.
Press the green [PRESET) key.
3. Connect the spectrum analyzer CAL
4. Set the frequency.
Press the
the center-frequency function is active. The
video to indicate that center frequency is the active function. The active function block is
the space on the screen within the graticule where the center frequency messages appear.
Functions appearing in this block are active: their values can be changed with the knob,
step keys, or number/units keypad. Set the center frequency to 300 MHz with the DATA
keys by pressing 300 (MHz. The knob and step keys can also be used to set the center
frequency.
5. Set the span.
Press (SPAN_). SPAN is now displayed in the active function block, and the SPAN softkey label
appears in inverse video to indicate it is the active function. Reduce the span to 20 MHz by
using the knob, pressing the down key (a), or pressing 20 m.
6. Set the amplitude.
When the peak of a signal does not appear on the screen, it may be necessary to adjust
the amplitude level on the screen. Press
active function block. The
that reference level is the active function. The reference level is the top graticule line on
the display and is set to 0.0 dBm. Changing the value of the reference level changes the
amplitude level of the top graticule line.
If desired, use the reference level function to place the signal peak on the screen using the
knob, step keys, or number/units keypad. (Marker functions determine the frequency and
amplitude of a signal.)
to the INPUT 5OQ with an appropriate cable.
key. CENTER
appears on the left side of the screen, indicating that
CENTER FREQ
REF LVL
REF LEVEL .O dBm
appears in the
Getting Started 2-13