Keysight DAQ970A User Guide

DAQM905A Dual 1:4 RF Multiplexer (50 Ω) Module
These modules consist of two independent banks of 4-to-1 multiplexers, which offer wideband switching
capabilities for high frequency and pulsed signals. The channels in each bank are organized in a “tree” struc-
ture to provide high isolation and low VSWR. Both modules have a common earth ground, offer low
crosstalk and excellent insertion loss performance. To create larger RF multiplexers, you can cascade mul-
tiple banks together.
This module does not connect to the internal DMM. You can connect your signals directly to the on-board
SMB connectors or to the SMB-to-BNC cables provided with the module.
You can close only one channel per bank at a time on these modules; closing one channel in a bank
will open the previously closed channel. One channel in each bank is always connected to COM.
This module responds only to the CLOSE command (OPENdoes not apply). To OPENa channel,
send the CLOSE command to another channel in the same bank.
TO PREVENT ELECTRICAL SHOCK
To prevent electrical shock, use only wire that is rated for the highest voltage to any channel. Before
removing a module cover, turn off all power to external devices connected to the module.
CAUTION WITH MULTIPLE SIGNALS
To avoid the possibility of multiple signal sources becoming connected together, we recommend
when multiplexing two or more sources they should be connected on separate modules or on sep-
arate banks of the same module.
CAUTION WITH HAZARDOUS VOLTAGES
When any channel is connected to a hazardous voltage source, all channels in the module should be
treated as hazardous and all channel wiring in the module should be rated for the maximum voltage
applied. Thermocouples attached to any other channel on the module should have insulation rated
for the maximum voltage, or have additional insulation added rated for the maximum voltage and
should be isolated from conductive parts using a thermal compound or tape rated for the maximum
voltage applied. Do not mount, move, or remove any thermocouples when the device under test is
connected to a supply source.
ENVIRONMENTAL HEALTH AND SAFETY
When any channel is connected to a hazardous voltage source, the instrument and the device under
test should be supervised, following local EHS practices to restrict access.
Keysight DAQ970A User's Guide 171
[Channel] Menu Overview

Keysight DAQ970A Specifications

General

Scan Rate	Up to 450 channels/sec
Connectivity	USB, LAN, GPIB (optional)
Display	4.3-inch color LCD
Operating Temperature	0 °C to 50 °C
Number of slots	3 slots
Measurement Types	DCV, ACV, DCI, ACI, 2-wire resistance, 4-wire resistance, frequency, temperature, capacitance
Voltmeter	6.5 digit
Resolution	22 bits
Memory	Non-volatile memory