PMX40 RF Power Meter – INSTRUCTION MANUAL
2-2
the bottom of the instrument. Rack mounting instructions are provided with the optional rack mount
kit.
2.2
Power Requirements
The PMX40 is equipped with a switching power supply that provides automatic operation from a 90 to
264 VAC, 47 to 63 Hz single-phase, AC power source. Maximum power consumption is 70 VA. Connect
the power cord supplied with the instrument to the power receptacle on the rear panel. See Figure 3-2.
Caution
Before connecting the instrument to the power source, make certain that a 1.0-ampere
time delay fuse (type T) is installed in the fuse holder on the rear panel.
Before removing the instrument cover for any reason, position the input module power
switch to off (0 = OFF; 1 = ON) and disconnect the power cord.
2.3
Connections
Sensor(s)
Compatible sensors can be connected to any of the USB ports on the front or rear panel.
However, the base PMX40 model only permits two sensors to be active at any one time.
With the PMX40-4CH option, four sensors can be active at any one time. Sensors
become active when plugged into a USB port or immediately if already plugged in when
the PMX40 powers up.
Trigger
Most triggered applications can use the RF signal applied to the sensors for triggering.
For measurements requiring external triggering, connect the external trigger signal to
the Trig In BNC connector on the rear panel and connect a Sync cable from the Sync
connector on the meter to the Multi I/O port on the sensor.
Note
The Sync cable must be connected to the Sync port corresponding to the USB port for
the sensor Channel in use.
Remote
If the instrument is to be operated remotely using the GPIB (IEEE-488) bus, connect the
instrument to the bus using the rear panel GPIB connector and appropriate cable. For
Ethernet control, connect to the rear panel LAN connector. In most cases, it will be
necessary to configure the interface using the System
I/O
Config menus.
