Keysight PNA-X Series User Manual

Option H11 – IF access (continued)
The 85309 LO/IF distribution unit interfaces with the PNA, PNA-X in two different
ways, providing either a 20 MHz IF signal for PNA and PNA-X or an 8.33 MHz for PNA, a
7.606534 MHz for PNA-X and PNA-X measurement receiver IF signal. It is important to
understand the differences in each conguration before setting up your measurement.
85309B with PNA congured with Options 014 and 080 or PNA-X
Option 080
With this setup, the PNA or PNA-X operates in frequency offset mode and the 85309B
must create a 20 MHz IF signal. The receiver is set to 20 MHz and the RF and LO sources
must be offset by 20 MHz. The test and reference signals are inserted through the front
panel links, bypassing the internal coupler. This conguration improves the noise oor
by approximately 10 to 38 dB, depending on frequency. However, operation in frequency
offset modes results in a decrease of frequency stepping speed.
85309B with PNA congured with Options 014, 080, 081, UNL, and
H11
With this setup, the 85309B must create an 8.33 MHz IF signal. The RF and LO sources
must be offset by 8.33 MHz. Normal operation of the PNA automatically offsets the
internal LO 8.33 MHz from the internal RF. Above 20 GHz the PNA switches to 3rd
harmonic mode so that RF – 3 * LO = 8.33MHz. This conguration allows the 85309B
IF output to be connected to the PNA H11 rear panel IF inputs, bypassing the rst PNA
mixer. This conguration provides the best sensitivity.
85309B with PNA-X congure with Option 020 and 080
With this setup, the 85309B must create a 7.605634 MHz IF signal. The RF and LO
sources must be offset by 7.605634 MHz. Normal operation of the PNA-X automatically
offsets the internal LO 7.605634 MHz from the internal RF. This conguration allows
the 85309B IF output to be connected to the PNA-X option 020 rear panel IF inputs,
bypassing the rst PNA-X mixer. This conguration provides the best sensitivity.
85309B with PNA-X Measurement Receiver
With this setup, the 85309B must create a 7.605634 MHz IF signal. The RF and LO
sources must be offset by 7.605634 MHz. PNA-X measurement receiver option 108 au-
tomatically offsets 7.605634 MHz from the external RF when operates in couple mode.
This conguration allows the 85309B IF output to be connected to the rear panel IF
inputs. This conguration provides the best sensitivity and lower cost.
40 | Keysight | Antenna Test – Selection Guide

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)