Keysight PNA-X Series User Manual

Figure 19. Receive site conguration with external mixing using the N5264A PNA-X
measurement receiver.
Select the LO Source
The recommended microwave mixers use fundamental mixing from 300 MHz to 18 GHz,
and harmonic mixing for frequencies above 18 GHz. Thus, an LO source that operates
over the frequency range of 0.3 to 18 GHz will be adequate for all frequencies of opera-
tion. A large selection of sources is available for the LO source. In many situations the
PNA Series can supply the LO signal since the LO sources only need to operate over the
frequency range of 0.3 to 18 GHz.
The LO source must be able to supply 0 to 6 dBm power at the 85309B LO input. To de-
termine whether the source has enough power, cable losses must first be considered.
Loss of LO cables is dependent on frequency; lower frequencies have lower loss per unit
length, and higher frequencies have higher loss. Therefore the maximum LO frequency
utilized will result in the maximum cable loss. The maximum LO frequency is dependent
on the frequency specied for the antenna range and whether fundamental or harmonic
mixing is used. There is a trade-off between LO frequency and system sensitivity. Fun-
damental mixing provides the lowest conversion loss in the mixer, and the best system
sensitivity. Harmonic mixing allows lower LO frequencies to be used (with longer cable
lengths), but has higher conversion loss in the mixer, and less system sensitivity.
PNA-X measurement receiver
with Option 108
RF out (P
S
)
+23 dBm–9 dBm
7.605634 MHz
Rear input
Option 020
+15 dBm–10 dBm
7.605634 MHzIF inputs
Damage
level
Max input
(.1 dB)
FreqInput
IF
85309B
85320B
Reference mixer
85320A
Test mixer
LO in
Pout = 19 dBm Pout = 19 dBm
Pin = 8 to 16 dBm
Pin = 8 to 16 dBm
Pin = 0 to 6 dBm
LO in
RF in
Pin < 26 dBm
RF in
Pin < 26 dBm
P
TM
P
RM
L
1
L
2
L
3
L
4
L
5
30 | 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)