HP ESA-L1500A, Руководство пользователя и калибровки

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Chapter 2 31
Getting Started
Front Panel Features
13 Esc
. The
Esc
(escape) key deactivates the active
function and blanks the active function text from the
display.
Esc
will abort a print (if one is in progress) and
clear error messages from the analyzer display. It also
clears input and tracking generator overload
conditions.
14 More
. The
More
key accesses other pages of a multi-page
menu. A
1 of 2
type message is displayed just above the
key if there is more than one page.
15 INPUT 50
Ω
(
INPUT 75
Ω
for Option 1DP) is the signal
input for the spectrum analyzer.
16 RF OUT 50
Ω
(for Option 1DN) or
RF OUT 75
Ω
(for Option
1DQ) is the source output for the built-in tracking
generator. Option 1DN or 1DQ only.
CAUTION
If the tracking generator output power is too high, it may damage the
device under test. Do not exceed the maximum power that the device
under test can tolerate.
17
The
l
(On) key turns the analyzer on, while the
O
(Standby) key turns most of the analyzer off. An
instrument alignment is performed every time the
analyzer is turned on. After turning on the analyzer,
allow 5 minutes of warm-up time to ensure the
analyzer will meet all specifications.
NOTE
The instrument continues to draw power when it is plugged into the ac
power source even if the line power switch is in standby. The detachable
power cord is the instrument disconnecting device. It disconnects the
mains circuits from the mains supply before other parts of the
instrument. The front-panel switch is only a standby switch and is not a
LINE switch (disconnecting device).
Data Controls
Data controls are used to change values for functions such as center
frequency, start frequency, resolution bandwidth, and marker position.
The data controls will change the active function in a manner
prescribed by that function. For example, you can change center
frequency in fine steps with the knob, in discrete steps with the step
keys, or to an exact value with the numeric keypad. Resolution
bandwidth, however, which can be set to discrete values in a 1, 3, 10
sequence only, is changed to the closest allowed value with any of the
data controls.