User Manual

Boonton 4540 Series RF Power Meter
Getting Started
3-4
Table 3-1 Operating Controls, Indicators and Connections (continued)
Reference #
Front Rear Nomenclature Function
11 Cal/Zero Key Displays the Sensor Calibration menu to select and initiate automatic sensor
offset and gain adjustments using the 4540’s built-in 50MHz calibrator or an
external calibrator. The menu also permits manual control of the calibrator’s
output. Pressing Cal/Zero again will toggle between active channels.
12 Enter/Run Key Completes a numeric or picklist entry in menu mode. When menu is not active,
pressing Enter/Run when stopped causes the instrument to run. When already
running, it causes all filters or buffers to be flushed, and a fresh measurement is
started.
13 On/Standby Key Toggles the instrument between ―on‖ (fully powered) and ―standby‖ (off, except
for certain low-power internal circuits) modes. Entering standby mode will
perform a save of the current instrument state before shutdown. Pressing and
holding the On/Standby key for several seconds will force standby mode if the
instrument has become non-responsive. In this case, no context save is
performed.
14 LAN Ethernet LAN connector for remote control and firmware updates. Allows
DHCP or fixed (IP / Subnet) setting mode. LAN parameters can be configured
through the menu.
15 USB USB Type B (Device) connector for remote control. Compatible with USB1.1
and USB2.0
16 GPIB 24-pin GPIB (IEEE-488) connector for connecting the power meter to the
remote control General Purpose Instrument Bus. GPIB parameters can be
configured through the menu.
17 Trig In BNC input for connecting an external trigger signal to the power meter. Voltage
range is ±50 volts, but the input impedance is 1 Megohm to allow use of
common 10x oscilloscope probe for a ±50 volt input range.
18 Multi I/O BNC input/output for flexible use. May serve as a status or alarm output, signal
level monitor, or settable voltage source.
19 Ext Cal / VGA Out HDB-15 connector for connecting a Model 2530 External 1GHz calibrator, or a
VGA compatible analog RGB video monitor.