Keysight PNA-X Series Configuration Guide

Page 14
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PNA-X Series Test Set and Power Configuration Options (Continued)
4-ports, dual sources, with extended power
range, bias tees, combiner, mechanical switches,
and low-frequency extension (Option 425)
Along with two sources and the access loops, attenuators,
bias tees, combiner, and mechanical switches of Option 423,
Option 425 adds additional hardware to extend the start
frequency of the PNA-X down to 900 Hz. The extended start
frequency is available only for the following measurement
classes: standard, gain compression (amplifier and converters),
and for magnitude-only measurements using SMC (scalar
mixer/converter) or SMC+Phase. In the standard channel,
pulsed RF, true-mode stimulus, and source phase control
are not supported for measurements below 10 MHz. To
independently control the frequency of the second internal
source, one of the following software applications is required:
S93080/029/082/083/084/086/087/089/090x/093/094B/A
or S94510/511A. The block diagram below shows how the
low-frequency hardware is configured for one test port; the other
test ports are configured similarly. For test port 1, the combiner
and noise tuner (not shown) are only available for use down to
10 MHz, and for test port 2, the low-noise receiver (not shown) is
only available for use down to 10 MHz.
Standard source
10 MHz - 8.5/13.5/26.5/43.5/50/67.5 GHz
Pulse modulator
R1
A
Test
port
A'
LF source
900 Hz - 100 MHz
R1'
External bias
Test port 3
C
R3
Test port 1
R1
Test port 4
R4
Test port 2
R2
A
D
B
To receivers
LO
Pulse generators
Rear panel
1
2
3
4
Source 1
OUT 1 OUT 2
Pulse
modulator
Source 2
(standard)
OUT 1 OUT 2
Pulse
modulator
J9J10J11 J8 J7 J2 J1J4 J3
35 dB 35 dB 35 dB
35 dB
65 dB 65 dB 65 dB 65 dB
J6 J5
RF
OUT
LO
OUT
R A B C D
IF inputs
4-ports, dual sources, with extended power
range, bias tees, combiner, and mechanical
switches (Option 423)
Along with two sources and the access loops, attenuators,
and bias tees of Option 419, Option 423 includes a combiner,
mechanical switches, and more access loops. The internal
second source provides an additional signal (fixed or swept) for
two-tone intermodulation testing of amplifiers, or for use as a
local oscillator for testing mixers and frequency converters. The
mechanical switches switch the combiner in and out as needed,
as well as enabling the additional access loops for advanced
configurations. The second source drives ports 3 and 4, and
is also available from port 1 when combined with source 1, or
via rear-panel (N5241/42/44/45/49B) or front-panel (N5247B)
access loops. The bias tees are connected directly to the test
port couplers, which limits the maximum power rating on the
pair to +30 dBm (additional attenuators or isolators are typically
required to protect other components inside the instrument).
To independently control the frequency of the second internal
source, one of the following software applications is required:
S93080/029/082/083/084/086/087/089/090x/093/094B/A or
S94510/511A.
1. The block diagrams shown above include hardware that must be ordered
as separate options, such as pulse modulators (Options 021 and 022),
and IF access (Option 020), or is controlled by application software, as
is the case for the pulse generators. In addition, the combiner type and
attenuator values vary by model number. Refer to the product data sheet
for the correct block diagram for a specific model.

Keysight PNA-X Series Specifications

General

Output Power	+13 dBm (typical)
Number of Ports	2 or 4
Dimensions	426 mm (W) x 470 mm (D)
Power Requirements	100 to 240 VAC, 50/60 Hz
Frequency Range	10 MHz to 26.5 GHz (varies by model)