HP E1474A VXI Six 1x4, 75 Ohm RF Multiplexer

Product Summary

The HP E1474A 75 Ohm RF Multiplexer is a C-size, 1-slot, register-based VXI module. It is the ideal choice for video and telecommunications applications. The HP E1474A is functionally identical to the HP E1472A except for output impedance.

The RF multiplexer can be used as six multiplexers or combined with others to form a larger tree-switched multiplexer or a limited stubless matrix. You can easily and inexpensively expand the HP E1474A via the HP E1475A 75 Ohm RF multiplexer expander or via the HP E1473A 50 Ohm RF multiplexer expander.

Programming
The HP E1474A can easily be programmed with SCPI commands to scan multiple channels, where each channel is switched to its common, one at a time. This module is arranged as six independent banks of channels (Bank 0 through Bank 5), each acting as a 1x4 1-wire multiplexer. Only one channel in each bank can be connected to its common at any time. The multiplexer relays are arranged in a tree-switched configuration, providing high isolation and low VSWR. Each channel consists of a nonlatching, armature relay.

Configuration
Each channel consists of a non-latching, armature relay. At power-on or reset, channels 00, 10, .. 50 are connected to COM 00, 10, .. 50, respectively, and all other channels are open (unterminated).The RF multiplexer can be used as six multiplexers or combined with others to form a larger tree-switched multiplexer or a limited stubless matrix as shown in the accompanying diagram. To expand the HP E1474A refer to the HP E1475A 75 Ohm RF multiplexer expander or the HP E1473A 50 Ohm RF multiplexer expander. The HP E1474A can control other external relays requiring 5 V, 12 V, or 24V drive.

Product Features

• Six 1x4 multiplexers
• Switch signals up to 1.3 GHz
• SMB male connectors for high performance
• Controls the HP E1475A 75 ohm RF expander and the HP E1473A 50 ohm RF expander
• Tree switching for high isolation, low VSWR
• VXIplug&play frameworks are supported per the Instrument Drivers information listed below.

Note: Configuration software that allows you to easily select compatible interfaces, controller platforms, and VXI test system components is available on CD ROM. Order the "Test System and VXI Products Catalog and CD ROM" from the Test & Measurement Catalogs available on this web site.

Product Specifications

Input (HP E1474A):
Maximum Voltage:	42 V
(center or shield-to-center, shield or chassis)

Maximum Current (per channel or common): 
     DC:         1 A
     AC rms:     1 A 

Maximum Power (per channel common):	
     DC:         24 W 
     AC:	 24 VA 




DC (HP E1474A):
Maximum Thermal Offset:			6 µV

Closed Channel Resistance (typical):	<1 ohm

Insulation Resistance (between any two terminals): >108 ohm
						   <=40°C, <=95% RH




AC (HP E1474A):
Characteristic Impedance (ZL=ZS=ZO):	75 ohm

Insertion Loss:
	<10 MHz:	<0.3 dB
	<100 MHz:	<0.4 dB
	<500 MHz:	<0.8 dB
	<1.3 GHz:	<1.0 dB

Crosstalk (channel-to-channel):
	<10 MHz:	<-85 dB
	<100 MHz:	<-75 dB

Crosstalk (one channel closed or channel-to-common):
	<500 MHz:	<-60dB
	<1.3 GHz:	<-42 dB

VSWR:
	<10 MHz:	<1.05
	<100 MHz:	<1.15
	<500 MHz:	<1.35
	<1.3 GHz:	<1.5

Risetime:		<300 ps

Signal Delay:		<3 ns




General (HP E1474A):
Typical Relay Life: 	No load 5x106 operations
			At rated load 105 operations

Relays:		Nonlatching, armature


VXI Characteristics
VXI device type:        Register-based, A16, slave only
Size:                   C
Slots:                  1 
Connectors:             P1/2
Shared memory:          None
VXI busses:             None
C-size compatibility:   n/a

Instrument Drivers
Click here for driver 
availability and downloading.
Command module 
 firmware:               ROM 
Command module 
 firmware rev:   A.02
I-SCPI Win 3.1:          Yes
I-SCPI Series 700:       Yes
C-SCPI LynxOS:           Yes
C-SCPI Series 700:       Yes
HP VEE Drivers:          Yes
VXIplug&play Win 
Framework:               Yes
VXIplug&play Win95/NT 
Framework:               Yes
VXIplug&play HP-UX 
Framework:               No (not available at time of publication)


Module Current
                IPM       IDM 
+5 V:           0.1       0.1
+12 V:          0.36      0.01



Cooling/Slot
Watt/slot:  6.00
deltaP mm H2O:  0.10
Air Flow liter/s:  0.50

Product Ordering Information

HP E1474A	VXI Six 1x4, 75 Ohm RF Multiplexer
   Opt 0B3	Service manual  
   Opt W01	3-yr. return to HP to 1-yr. on-site warranty


Cables and Connectors

Various 75 Ohm cables are available from HP for connecting to the 
SMB connectors on the front panel of the multiplexer. Adaptors and 
other connectors are also available. Connectors are also available 
from Johnson Components:

U.S.A. Tel.: 1-800-247-8256
outside U.S.A. Tel.:(507) 835-6222
Fax.:(507) 835-8356

HP E1474A Technical Specifications Datasheet

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Page Updated: Thursday June 19 16:15:35 UTC 1997