64 Chapter 3
Making Measurements
Instrument Front Panel Highlights
Selected PSA Front-Panel Features
1. The On/Off switch toggles the AC Line power between On and Standby. A
green LED will light when the instrument is On. When energized in the standby
mode, a yellow LED is lit above the switch.
2.
FREQUENCY Channel accesses a key menu to set the analyzer center
frequency in units of Hz, kHz, MHz, or GHz, or by channel number. These
parameters apply to all measurements in the current mode.
3.
MODE accesses a key menu to select one of the measurement personalities
installed in the instrument. Each mode is independent from all other modes.
4.
Mode Setup accesses a key menu that sets parameters specific to the current
mode and can affect all measurements within that mode.
5.
MEASURE accesses a display key menu to initiate one of the various
measurements that are specific to the current mode.
6.
Meas Setup accesses the menus of test parameters that are specific to the
current measurement.
7.
Restart causes a measurement to start again from the initial process according
to the current measurement setup parameters.
8.
RF INPUT port: Type N connector for the E4443A, E4445A, and E4440A
PSAs. 2.4mm on the E4446A and E4448A PSAs. 3.5mm connector on all
E4440As with Opt BAB. The maximum input power level is shown next to the
port.
9. The
Data Entry keypad is used to enter numeric values. Keypad entries are
displayed in the active function area of the screen and become valid for the
current measurement upon pressing the
Enter key or selecting a unit of
measurement, depending on the parameter.
10.The Display Menu keys allow you either to activate a feature or to access a
more detailed sub-menu. An arrow on the right side of a softkey label indicates
that the key has a further selection menu. The active menu key is highlighted,
however, grayed-out keys are currently unavailable for use or only show
information. If a menu has multiple pages, successive pages are accessed by
pressing the
More key located at the bottom of the menu.
11. Pressing the
Return key allows you to exit the current menu and display the
previous menu. Often, pressing a menu key will invoke a multi-page sub-menu.
Pressing the
Return key will show the menu “above” it, not a previous page.
When you activate another measurement, the return list is cleared. The
Return
key will not return you to a previously activated mode, nor will it alter any
values you have entered in previous menus.
12.BNC
Audio Input (PSA Option 233 Measuring Receiver only) Provides a
100 kOhm input for audio measurements. Frequency range is 20 Hz to
250 kHz. Safe input level is 7 Vrms or 20 V DC.
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