Controlling the 4540 – Boonton 4540 Peak Power Meter Quick Start User Manual

Page 6

4540 Power Meter

Quick Start Guide

PN: 98406000A

Page 6

CONTROLLING THE 4540

On / Standby
Pressing the On/Standby key switches the power meter between on
and standby modes. When in standby, some circuitry remains powered
to reduce drain on the battery used to maintain the instrument’s real-
time clock. The instrument’s current operating state is automatically saved before
entering standby.

Control Keys
Control keys allow maneuvering through the menus of the 4540. All keys are multi
functional and provide functionality depending on the current status of the
instrument. An additional key is not necessary, since the system will
automatically assume the wanted function.

Esc / Stop / Local
Aborts any operation in progress when in Menu Mode or Zero/Cal Mode.
Pressing Esc / Stop / Local while the instrument is running causes the
process to stop. Pressing it when already stopped will clear the screen and
reset all measurement values. Pressing Esc / Stop / Local when the
instrument is in remote mode (the GPIB, LAN or USB has control of the
instrument and keyboard entry is disabled) will return it to local mode (the instrument
is under keyboard control) unless the local lockout command, LLO, has been issued
by the controller.

Pressing the Esc / Stop / Local key performs ONE of the following prioritized
operations, depending upon the current instrument state. The list is evaluated from
the top, and once a condition is met, its action is taken and the rest of the list is
ignored.

• Enters Local control mode if the instrument is in Remote control mode (unless

the Local Lockout remote command has been sent)

• Aborts a sensor Cal, Zero or Autocal operation that is in progress
• Clears error message and queue if any errors are present (red error message

text shown)

• Aborts display of report screen or error dialog being shown
• Aborts any numeric input or menu pick list entry that is in progress
• Deselects any selected menu button
• Stops measurement acquisition if running
• Clears acquired measurement if acquisition is already stopped