Product specifications

17
In order to keep a communication system working reliably
long term, you need to monitor the spectrum routinely.
Regular spectrum monitoring is usually accomplished
automatically by using remote control software to drive
the spectrum analyzer. You can remotely control the HSA
using SCPI commands over LAN and USB, or use the HSA
PC software to monitor spectral changes. There are two
modes that are used to set up the HSAs’ LAN IP address:
static and DHCP.
In this demonstration, we will show how to set HSA’s IP
address.
Instructions for HSA Keystrokes for HSA
Set HSA’s IP address is in
static mode
[Shift], {System}, {More 1 of
2}, {Port Setting}, {IP Config},
{IP Address (Static)}
Set IP address such as:
192.168.0. 12
[192.168.0.12], [Enter]
Set gateway such as:
192.168.0.8
[192.168.0.8], [Enter]
Set subnet mask such as:
255.255.255.0
[255.255.255.0], [Enter],
{Apply}
Set HSA’s IP address
automatically using DHCP
mode
[Shift], {System}, {More 1 of
2}, {Port Setting}, {IP Config},
{IP Address (DHCP)}, {Apply}
Demonstration 7
Remote control via LAN or USB port
The N934xC HSAs each have a total of six markers that
can be used in normal or delta mode. In addition to the
marker table and peak search, each N934xC HSA also has
a peak table feature which automatically searches 10 max
or min peak signals simultaneously and is updated after
each sweep.
In this demonstration, we will use peak table to find the
absolute values of FM signal sidebands.
Note: To prevent data corruption when saving the table to a USB
memory device, set the file directory to USB then reset to INT
before removing the device.
Demonstration 8
Marker, marker table, and peak table
Instructions for the
source
Keystrokes for the
source
Set 2 GHz center frequency,
amplitude -10 dBm, 100 kHz
deviation, 30 kHz rate, FM
signal
[Preset], [FREQ], [2], {GHz},
[AMPTD], [-10], {dBm},
[FM/ФM], {FM On}, {FM Dev}
[100], {kHz}, {FM Rate}, [30],
{kHz}, [Mod On], [RF On]
Instructions for HSA Keystrokes for HSA
Set center frequency to 2 GHz [Freq], [2], {GHz}
Set span to 500 kHz [Span], [500], {kHz}
Set reference level to -10 dBm [Amptd], {Ref Level}, {10},
{dBm}
Peak search [Shift], [Peak], {Peak Search}
Measure the absolute peak
amplitude of FM sidebands
using the peak search table.
Peak search table will display
up to 10 peaks (Figure 21)
{More 1 of 2}, {Peak Table},
{Peak Table On}
Change peak criterion [Shift], [Peak], {More 1 of 2},
{Peak Criterion}, user can set
the peak threshold limit, peak
excursion limit and peak type
Save peak table in a .csv
format
[Shift], [Peak], {More 1 of 2},
{Peak Table}, {Export Table to
CSV}, input file name, [Enter]
Turn the peak table off [Shift], [Peak], {More 1 of 2},
{Peak Table}, {Peak Table Off}
Figure 21. FM sidebands peak values in peak table