GW Instek GSP-818 Series Owner's manual

Spectrum Analyzer
GSP-818 Series
PROGRAMMING MANUAL
GW INSTEK PART NO
ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information which is protected by
copyright. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of Good Will Corporation.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves the
right to change specifications, equipment, and maintenance
procedures at any time without notice.
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan.

Table of Contents
3
Table of Contents
SAFETY INSTRUCTIONS .................................................. 4
GETTING STARTED.......................................................... 8
Package Contents and Accessories................................9
Front Panel Overview ..................................................10
Rear Panel ..................................................................10
Front Panel Function Key ............................................14
Parameter Input ..........................................................17
User Interface .............................................................19
COMMAND OVERVIEW ..................................................21
Command Syntax ........................................................21
List of Commands in Functional Order .......................24
COMMAND DETAILS ......................................................30
Common commands ...................................................31
Calculate Commands ..................................................32
Calibration Commands ...............................................47
Configure Commands .................................................48
Display Commands .....................................................50
Hcopy Commands.......................................................57
Initiate Command .......................................................60
MMEMory Commands ................................................61
Output Subsystem ......................................................65
Sense Commands .......................................................66
Source Command .......................................................94
System Commands .....................................................95
Trace Commands ...................................................... 100
Trigger Commands.................................................... 102
UDISK Commands .................................................... 103
UNIT Command........................................................ 104

GSP-818 Programming Manual
4
SAFETY INSTRUCTIONS
This chapter contains important safety instructions
that you must follow when operating the GSP-818,
and when keeping it in storage. Read the
following before operating the GSP-818 to ensure
your safety and to keep the GSP-818 series in the
best possible condition.
Safety Symbols
These safety symbols may appear in this manual or on the GSP-818.
WARNING
Warning: Identifies conditions or practices that
could result in injury or loss of life.
CAUTION
Caution: Identifies conditions or practices that
could result in damage to THE GSP-818 or to other
properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Earth (ground) Terminal
Do not dispose electronic equipment as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased.

SAFETY INSTRUCTIONS
5
Safety Guidelines
General
Guideline
CAUTION
Do not place any heavy object on the GSP-818.
Avoid severe impact or rough handling that
leads to damaging the GSP-818.
Do not discharge static electricity to the GSP-
818.
Do not block or obstruct the cooling fan vent
openings.
Do not perform measurement at circuits directly
connected to Mains (Note below).
Do not disassemble the GSP-818 unless you are
qualified as service personnel.
The equipment is not for measurements
performed for CAT II, III and IV.
(Measurement categories) EN 61010-1:2010 specifies the
measurement categories and their requirements as follows. The
GSP-818 falls under category I.
Measurement category IV is for measurement performed at the
source of low-voltage installation.
Measurement category III is for measurement performed in the
building installation.
Measurement category II is for measurement performed on the
circuits directly connected to the low voltage installation.
0 is for measurements performed on circuits not directly
connected to Mains.
Power Supply
WARNING
AC Input voltage range: 100-120Vac/ 200-
240Vac (90-132Vac/ 180-250Vac)
Frequency: 50/60Hz
Connect the protective grounding conductor of
the AC power cord to an earth ground, to avoid
electrical shock.

GSP-818 Programming Manual
6
Fuse
WARNING
Fuse type: T3.15A/250V
Make sure the correct type of fuse is installed
before power up.
To avoid fire, only replace the fuse with the
specified type and rating.
Disconnect the power cord before fuse
replacement.
Make sure the cause of a fuse blowout is fixed
before replacing the fuse.
Cleaning the
GSP-818
Disconnect the power cord before cleaning.
Use a soft cloth dampened in a solution of mild
detergent and water. Do not spray any liquid.
Do not use chemicals or cleaners containing
harsh material such as benzene, toluene, xylene,
and acetone.
Operation
Environment
Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (Note below)
Temperature: 0°C to 40°C
Altitude: Up to 2000m
Transient Overvoltage on the main supply is
2500V.

SAFETY INSTRUCTIONS
7
(Pollution Degree) EN 61010-1:2010 specifies the pollution degrees
and their requirements as follows. THE GSP-818 falls under degree
2.
Pollution refers to “addition of foreign matter, solid, liquid, or
gaseous (ionized gases), that may produce a reduction of dielectric
strength or surface resistivity”.
Pollution degree 1: No pollution or only dry, non-conductive
pollution occurs. The pollution has no influence.
Pollution degree 2: Normally only non-conductive pollution
occurs. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
Pollution degree 3: Conductive pollution occurs, or dry, non-
conductive pollution occurs which becomes conductive due to
condensation which is expected. In such conditions, equipment
is normally protected against exposure to direct sunlight,
precipitation, and full wind pressure, but neither temperature
nor humidity is controlled.
Storage
environment
Location: Indoor
Relative Humidity: < 80%
Temperature: −10°C to 70°C
Disposal
Do not dispose this instrument as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased. Please make sure
discarded electrical waste is properly recycled to
reduce environmental impact.

GSP-818 Programming Manual
8
GETTING STARTED
This chapter introduces the front / rear panel, the
user interface and explains how to use the
instrument with a measurement example
demonstration.
Package Contents and Accessories ...............................9
Front Panel Overview ..................................................10
Rear Panel ..................................................................10
Front Panel Function Key ............................................ 14
Parameter Input..........................................................17
Numeric Keypad ........................................................................17
User Interface .............................................................19

GETTING STARTED
9
Package Contents and Accessories
The GSP-818 has a number of standard and optional accessories that
can be ordered. For more information please visit the GW Instek
website at www.gwinstek.com or consult your authorized
distributor for details.
Standard
Accessories
Description
Power Cable
Mains power cable (region dependent)
CD ROM
Contains GSP-818 User manual, quick start guide,
programming manual and USB driver
Optional
Accessories
Description
N-N Cable
N-SMA Cable
SMA-SMA Cable
SMA Adaptor
N-SMA Adaptor
Near Field Probe includes: Four near-field
probes, N-SMA adapter, SMA-SMA cable
(Frequency range: 30 MHz –3 GHz)

GSP-818 Programming Manual
10
Front Panel Overview
123
4
5
67891011
12
13
1.
LCD
800x600 color LCD display. The display
shows the soft keys for the current
function, frequency, amplitude and
marker information.
2.
Menu soft
keys
The F1 to F7 function keys directly
correspond to the soft keys on the right-
hand side of display.
3.
Function
keys
See page 14 for details.
4.
Knob
During parameter editing, turn the knob
clockwise to increase, or
counterclockwise to decrease the
parameter values at specified steps.
5.
Arrow keys
(1) Increase or decrease the parameter
value at specific steps while editing a
parameter.
(2) Move the cursor though the directory

GETTING STARTED
11
tree in the File function
6.
RF Input
connector
The RF input may be connected to a
device via a N type connector.
Note
When input attenuator is higher than 10 dB, the RF port
input signal must be less than +30 dBm.
Input voltage at RF input port must not be higher than
50 V DC to avoid damage to the attenuator and input
mixer tracking generator.
7.
Unit keys
Unit keys include GHz/dBm/s,
MHz/dB/ms, kHz/dBmV/μs and
Hz/mV/ns. After entering the desired
numbers, choose an appropriate unit to
complete the input. The specific meaning of
unit is decided by the type of input parameter
(“frequency”, “amplitude”or “time”).
8.
Numeric
keypad
See page 錯誤! 尚未定義書籤。 for
details.
9.
TG output
connector
The output of the tracking generator can
be connected to a receiver through an N
type male connector, users can purchase
this option if required.
10.
TG output
On/Off
button
When the TG function is enabled, the
backlight of button turns on and turns off
when the function is disabled.
11.
Earphone
interface
3.5mm stereo headphone jack (wired for
mono operation)
12.
USB Host
port
The analyzer may serve as a "host" device
to connect to external USB devices. This
interface is available for USB storage
devices.
13.
Power key
Push to turn on, long push to turn off

GSP-818 Programming Manual
12
Rear Panel
1
85
7643
2
1.
Handle
Stow the handle for mobile use.
2
AC power
connector
AC: frequency 50Hz±10％, single-phase
alternative 220V±15％or 110V±15％
3.
Stool
To adjust the angle of the device
4.
VGA port
provides a VGA signal output which is
used through a VGA cable or with a
projector
5.
LAN
interface
Through this interface, the analyzer can be
connected to your local network for remote
control. An integrated testing system can be
built quickly, as the analyzer conforms to the
LXI C Device class instrument standards.
6.
USB Device
interface
This configurable USB port permits external
USB devices. It supports PictBridge printer
and remote-control connection.
7.
10MHz
IN/OUT
The BNC input or output of the 10 MHz
reference clock

GETTING STARTED
13
8.
Lock hole
You can lock the spectrum analyzer to a fixed
location using the security lock (please buy it
yourself) to secure the spectrum analyzer.

GSP-818 Programming Manual
14
Front Panel Function Key
Basic keys
Marker measure measure
Utility keys
Control keys
Keys
Description
Basic keys
Activates the center-frequency function, and accesses
the frequency function menu.
Activates the frequency sweep span function, and set
Full Span\Zero Span\Last Span.
Activates the reference level function, and accesses
the amplitude softkeys, with which you set functions
that affect data on the vertical axis.
Searches the signal automatically within the full
frequency range.

GETTING STARTED
15
Control keys
Activates the RBW (resolution bandwidth) function,
and accesses the softkeys that control the bandwidth
functions and averaging.
Accesses the softkeys that allow you to store and
manipulate trace information.
Accesses the softkeys that allow you to configure
detector functions.
Accesses the softkeys that allow you to control what
is displayed on the analyzer, including the display
line, graticule and label.
Accesses the softkeys that allow you to set the sweep
time, select the sweep mode of the analyzer.
Accesses the softkeys that allow you to select the
trigger mode of the analyzer.
Accesses the softkeys that allow you to set the
tracking generator.
Accesses the softkeys that allow you to set the
demodulation.
Marker measure keys
Places a marker on the highest peak, and accesses the
Peak functions menu.
Accesses the marker control keys that select the type
and number of markers and turns them on and off.
Accesses the marker function soft keys that allow you
to set other system parameters based on the current
marker’s value.
Accesses the menu of special functions, such as noise
marker, N dB bandwidth measure and frequency
counting.

GSP-818 Programming Manual
16
Advanced measure keys
Accesses the softkeys that let you make transmitter
power measurements such as ACPR(adjacent channel
power), channel power, and OBW(occupied
bandwidth), etc.
Sets the parameters for the selected measurement
function.
Utility keys
Sets the system parameters, and accesses the
calibration menu.
Accesses the softkeys that allow you to configure the
file system of the analyzer.
Resets the analyzer to the factory settings or user
state. This state can be specified in 【System】→
[PowerOn/Preset►] →[Preset►].
Save the contents of the current screen quickly.
Accesses the soft keys that allow you to save current
screen, trace data, or user state.
Press the Help key to activate the help system. Press
the Help key again to exit.

GETTING STARTED
17
Parameter Input
Specific parameter values are able to be entered using the numeric
keypad, knob, and directional keys.
Numeric Keypad
Numeric keys
Numbers 0-9 are available to be used.
Decimal
point
A decimal point "." will be inserted at the
cursor position when this key is pressed.
Sign key
Sign key "+/-" is to toggle the sign of a
parameter. When pressed the first time, a "-"
will be inserted and changed into "+" following
the second press.
Cancel key
(1) During the editing process this key will
clear the inputs in the active area and exit
editing mode at the same time.
(2) Turn off the display in the active area.
(3) Exit current test mode while in keyboard
test.
Back key
(1) During the process of parameter editing,
this key will delete the characters on the left
side of the cursor.
(2) While in the process of file name editing,
pressing this key will delete characters that
have been entered.

GSP-818 Programming Manual
18
Enter key
When pressed, the system will complete the
input process and insert a default
measurement unit for the parameter
automatically.
Unit keys
Unit keys include GHz/dBm/Sec,
MHz/dB/mSec, kHz/dBmV/μSec and
Hz/mV/nSec. After entering the desired
numbers, choose an appropriate unit to
complete the input. The specific meaning of
unit is decided by the type of input parameter
("frequency", "amplitude" or "time").

GETTING STARTED
19
User Interface
Marker measure measure
12
1314
1516171820 19
1 2 4 8
35 6 7910 11
No.
Name
Description
Related Key
1.
Amplitude
Division Type
Can choose
logarithmic or linear
→ [Scale Type]
2
Amplitude
Division
Display division scale
→ [Scale/Div]
3.
Reference level
Reference level
→ [Ref Level]
4.
Detection type
Display detection type
5.
Attenuation
Display input
attenuation setting
→ [Attenuation]

GSP-818 Programming Manual
20
6.
Marker
Display current
activated marker
7.
Date/time
Display system date
and time
→ [Date/Time]
8.9.
Marker readout
Display frequency and
amplitude of current
marker
10.
Menu item
Menu item of current
function
11.
Menu title
Function of current
menu belongs to.
12.
LAN access sign
LAN access sign
13.
USB storage
device
Show if USB storage
device is inserted;
14.
Temperature
sign
Display device
internal temperature
15.
Sweep Time
System sweep time
→ [Sweep Time]
16.
Span
Display span width
→[Span]
17.
Video bandwidth
Display video
bandwidth
→ [VBW]
18.
Center frequency
Display center
frequency
→ [Center Freq]
19.
Resolution
bandwidth
Display resolution
bandwidth
→ [RBW]
20.
System status
Display spectrum
analyzer status