Agilent Technologies L4400 Manuale Utente Scaricare il pdf (Pagina 16)

Agilent 44478A/B

• Switching up to 1 A, 24 W

or 24 VA

• Insertion loss less than

1.9 dB at 1.3 GHz

The 44478A/B multiplexer

module is an ideal choice for

broadband switching of high-

frequency or fast pulse signals.

Dual 1-to-4 multiplexers provide

bi-directional switching of signals

from DC to 1.3 GHz. High channel

isolation (>55 dB at 1 GHz)

assures quality dynamic-range

measurements using spectrum,

network, or distortion analyzers.

Each 1-to-4 multiplexer consists

of seven relays in a “tree”

structure, which provides high

isolation and low VSWR (voltage

standing wave ratio). All the

connectors on the module’s

edge are female BNC for ease

of wiring. Off-channels can be

terminated in resistors to

maintain proper operation of

DUT circuitry. Simply plug a

50/75 Ω SMB-type resistive

termination onto the on-board

male SMB connectors provided

for each channel.

Dual 1 x 4 RF Multiplexer (1.3 GHz, 50/75 Ω)

Specifications

Input Characteristics

Maximum Scan Rate: 43 Chans./sec

Maximum Voltage: 42 V, DC + AC peak

Maximum Current: 1 A

Maximum Power:

(Per channel)

24 W, 24 VA or 44 dBm

Characteristic Impedance:

44478A: 50 Ω

44478B: 75 Ω

DC Performance

Thermal Offset: <6 µV (<2 µV, Typ.)

Initial Closed

Channel Resistance: <1 Ω

Insulation Resistance

(between terminals):

<(25°C, 40% RH) >10

10

Ω

Capacitance:

Center-Center: <0.006 pF

Center-Shield: <60 pF

Rise Time: <300 psec

Signal Delay: <3 nsec

AC Performance

Insertion Loss

≤(40°C, 95% RH) 10 MHz <0.3 dB

100 MHz <0.7 dB

500 MHz <1.5 dB

1.3 GHz <3.0 dB

≤(25°C, 40% RH) 10 MHz <0.2 dB

100 MHz <0.5 dB

500 MHz <1.1 dB

1.3 GHz <1.9 dB

Crosstalk

Channel-Channel, Channel-Common

10 MHz <-90 dB

100 MHz <-80 dB

500 MHz <-65 dB

1.3 GHz <-55 dB

Group-Group, Module-Module

10 MHz <-90 dB

100 MHz <-80 dB

500 MHz <-70 dB

1.3 GHz <-60 dB

VSWR 10 MHz <1.20

100 MHz <1.25

500 MHz <1.35

1.3 GHz <1.55

16

J101

3

J102

3

J104

3

J105

3

BNC CONNECTOR

SMB CONNECTOR

CH00

CH01

CH02

CH03

3

COM00 GROUP 00

J106

4

J107

4

J109

4

J110

4

TYPICAL CHANNEL RESISTIVE TERMINATIONS

For 44478A, R=50Ω (or 75Ω)

For 44478B, R=75Ω

ChXX

CH10

CH11

CH12

CH13

4

COM10 GROUP 10

1 2 ... 11 12 13 14 15 16 17 18 19 20

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