N4421A Front and Rear Panel

Discontinued  

This topic provides a graphical overview of the N4421A test set Front and Rear panels. The individual network analyzer features are described in the network analyzer documentation; not in this help file.

Front Panel

ID Number

Front Panel Feature

Feature Description

1

R1 OUT

2.4 mm (f) connector that connects to the network analyzer REFERENCE 1 OUT connector using a semirigid cable.

2

R1 IN

2.4 mm (f) connector that connects to the network analyzer REFERENCE 1 RCVR R1 connector using a semirigid cable.

3

PORT 2

2.4 mm bulkhead test port connector that is connect to the DUT or fixture. (+17 dBm maximum operating level)

4

GPIB STATUS

Three LEDs (R, T, and L) that display the GPIB status of the test set when it is communicating with the network analyzer. R = Remote Operation, T = Talk mode, L = Listen mode.

5

PORT 4

2.4 mm bulkhead test port connector that is connect to the DUT or fixture. (+17 dBm maximum operating level)

6

R2 IN

2.4 mm (f) connector that connects to the network analyzer REFERENCE 2 RCVR R2 connector using a semirigid cable.

7

R2 OUT

2.4 mm (f) connector that connects to the network analyzer REFERENCE 2 OUT connector using a semirigid cable.

8

SOURCE OUT

2.4 mm (f) connector that connects to the network analyzer PORT 2 SOURCE OUT connector using a semirigid cable.

9

CPLR ARM

2.4 mm (f) connector that connects to the network analyzer PORT 2 CPLR ARM connector using a semirigid cable.

10

B IN

2.4 mm (f) connector that connects to the network analyzer PORT 2 B IN connector using a semirigid cable.

11

CPLR THRU

2.4 mm (f) connector that connects to the network analyzer PORT 2 CPLR THRU connector using a semirigid cable.

12

AUXILIARY

15-pin ribbon (f) connector. Not currently used.

13

CPLR THRU

2.4 mm (f) connector that connects to the network analyzer PORT 1 CPLR THRU connector using a semirigid cable.

14

A IN

2.4 mm (f) connector that connects to the network analyzer PORT 1 A IN connector using a semirigid cable.

15

LINE

ON/OFF switch that disconnects the mains circuits from the mains supply before other parts of the test set. The front panel POWER switch disconnects the mains circuits from the mains supply after the EMC filters and before other parts of the instrument.

16

CPLR ARM

2.4 mm (f) connector that connects to the network analyzer PORT 1 CPLR ARM connector using a semirigid cable.

17

SOURCE OUT

2.4 mm (f) connector that connects to the network analyzer PORT 1 SOURCE OUT connector using a semirigid cable.

 

N4421A Rear Panel

ID Number

Rear Panel Feature

Feature Description

1

REF 2 R OUT

2.4 mm (f) connector, used as an output reference signal

2

REF 2 R IN

2.4 mm (f) connector, used as an input reference signal.

3

BUS ADDRESS

Switch that is used to set the GPIB address.

4

REF 1 R IN

2.4 mm (f) connector, used as an input reference signal

5

REF 1 R OUT

2.4 mm (f) connector, used as an output reference signal

6

Power Cord Connector

Connector, 100-120 Vac or 220-250 Vac input and Fuse, T 2.5 A 250 V (Keysight part number 2110-0681)

7

IEEE-488

24-pin IEEE-488/PCB (f) connector. The GPIB is the communication bus with the PC and the network analyzer.

8

PORT 2 BIAS

BNC (f) connector. The bias port is used to supply a dc voltage to an active DUT, such as an amplifier or a transistor.

9

PORT 2 FUSE

Bias Fuse, 0.5 A, 250 V (Keysight part number 2110-0012)

10

PORT 4 FUSE

Bias Fuse, 0.5 A, 250 V (Keysight part number 2110-0012)

11

PORT 4 BIAS

BNC (f) connector. The bias port is used to supply a dc voltage to an active DUT, such as an amplifier or a transistor.