Specifications

19
HP 44472A
• DC to 300 MHz
• BNC connectors for ease of wiring
Description
The HP 44472A VHF module offers broadband
switching capability for high frequency and pulse
signals. Two independent 50 Ω characteristic
impedance, bi-directional 1 x 4 switches are provided
for signals from DC to 300 MHz. Very low crosstalk
makes the VHF module ideal for VHF signal
measurements using spectrum, network, or distortion
analyzers. You can also use the excellent signal integrity
of the VHF module for multiplexing inputs to your GPIB
oscilloscope or waveform analyzer. Each group of four
channels is isolated from the other and from the chassis
to prevent ground loops. BNC connectors provide ease
of connection to the module.
Specifications
Input Characteristics
Maximum Voltage
(center-center, center-low): 250V DC, 30V AC RMS or 42V AC peak
(Low-chassis or low-low): 42V DC
Maximum Current(per chan.): 30mA DC,300mA AC RMS
Thermal Offset: <15µV
Characteristic Impedance: 50 Ω
Initial Closed Channel Resistance: <1 Ω
DC isolation <(40°C, 95% RH): >10
7
Ω
AC Isolation/Performance
30MHz 100MHz 300MHz
Insertion loss(dB) <0.5 <0.75 <1.25
Crosstalk(dB)
Within a Group <-100 <-85 <-65
Group-Group <-85 <-85 <-50
VSWR <1.06 <1.12 <1.43
Capacitance:
Center-center, center-common <0.002pF
Center-low <70pF
Low-chassis <0.20µF
Rise Time: <0.7 nsec
Signal Delay: <2.5 nsec (channel match <90psec)
HP 44473A
• Switching signals up to 250 V, 2 A
Description
The HP 44473A module brings highly flexible matrix
switching to your test system. You can use the matrix
switch module to conveniently connect a group of
instruments to several points on DUT (device under
test). Individual module provides a 4 x 4, 2-wire matrix
that allows any combination of inputs and outputs to be
connected for signals up to 250 V or 2 A .
Specifications
Input Characteristics
Relays: Armature latching relay
Thermal Offset: <3µV
Maximum Scan Rate: 43 ch/ sec
Relay life (mechanical): 10
8
Maximum Voltage: 250V
Maximum Current: Per channel 2A
Per module 8A
Maximum Power: Per channel 60W or 125VA
Per module 240W or 500VA
Initial Closed Channel Resistance: <1 Ω
DC Isolation <(40°C, 60%RH)
Open Channel: >10
11
Ω
HI-LO: >10
10
Ω
Channel-Chassis: >10
10
Ω
AC Isolation
Capacitance (with 1 channel closed):
Open Channel, Channel-Channel: <5pF
HI-LO: <40pF
Channel-Chassis: <70pF
Note: All voltage and current are in DC or AC RMS if not specified
100kHz 1MHz 10MHz
Insertion Loss <0.30dB <0.35dB <0.90dB
Crosstalk <-76dB <-56dB <-36dB
Dual 1x4 VHF Multiplexer (300 MHz, 50Ω)
4x4 2-Wire Matrix Switch Module