Tune-key Solution for RF and Communication Experiment Courses
GW Instek GSP-730 is a 3 GHz Spectrum Analyzer mainly developed to fulfill the demands of RF Communication educations. Budget constraint and insufficient teaching tools are normally the two hurdles for schools to provide high-quality courses for RF communication experiments. A moderate spectrum analyzer, GSP-730, featuring full functions should provide, along with GRF-1300 training kit possesses a unique position in the field as an economic turn-key solution for 3GHz RF Communication Experiment courses.
With its components, GSP-730 Spectrum Analyzer, GRF-1300 Trainer and a PC, properly connected, a tangible system is integrated for performing ongoing experiments while the lecture is given. Using a PC, the teacher can present teaching material with PowerPoint slide and simultaneously control GSP-730 and GRF-1300 to perform experiments and get spectrum displays and parameter readings on the PC screen. GSP-730 and GRF-1300 easily transferred the current teaching materials, including the PowerPoint slides, textbook, and a remote control software, into electronic-teaching system.
Fully-electronic RF training system
The combination of GSP-730 and GRF-1300 forms a fundamental training system for RF communication and telecommunication classes in the universities, colleges, vocational schools, and the training centers in military as well as private companies. Instead of the tremendous cost of the installation of new training system, the conjunction of GSP-730 and GRF-1300 provides an economic solution to eliminate two obstacles, budget constraint and insufficiency of teaching tools.
150kHz to 3GHz
within ±50kHz (frequency span : 0.3GHz to 2.6GHz, 20 ±5°C)
1MHz to 3GHz
within ±3% (frequency span : 0.3GHz to 2.6GHz, 20 ±5°C)
less than -45dBc @ -40dBm Ref. Level (typical less than -50dBc)
+20 to -40dBm
dBm, dBV, dBµV
Average Noise Level
≤ -100dBm (typical, center frequency : 1GHz RBW : 30kHz)
Accuracy : Within ±2dB (1GHz);SPAN:5MHz; Ref. Level 0dBm, input signal -10dBm;
within ±3.0dB @300MHz~2.6GHz, within ±6.0dB @ 80~300MHz, 2.6~3GHz
less than 2.0@input att ≧10dB
Input damage level
+30dBm (CW average power), 25VDC
300ms to 8.4s, auto (not adjustable)
within ±2% ( frequency span : full span)
640*480 RGB color LCD
Sub-D female-D 9 pins
USB Host/Device full speed supported
Sub-D female 15 pins
AC 100~240V, 50/60Hz
5 to 45°C (Guaranteed at 25 ±5°C, without soft carrying case)
Less than 45°C / 90%RH
-20 to 60°C, less than 60°C / 70%RH
296 (L) × 153 (W) × 105 (H) mm
GSP-730 Quick Start manual *1, User Manual CD *1, Power Cord *1 GRF-1300 Experiment test book of student version, Remote control software CD, RF Cable *3, Antenna *1, N to SMA adaptor connector, Power Cord *1
Option Experiment text book of teacher version
Free Download PC Software Remote Monitor Software
3GHz Spectrum Analyzer
RF & Spectrum Analyzer Training System
GSP-730 + GRF-1300A + USG Series Specification
GSP-730 + GRF-1300A + USG Series Flyer
This presentation is a electronic manual for GRF-1300/GSP-730. (This version is 64bit OS used.)
This presentation is a electronic manual for GRF-1300/GSP-730. (This version is 32bit OS used.)
PrimaryRF PC Software V1.53
USB Driver of GRF-1300A / GRF-1300 / GSP-730, for Win XP/7/8.x.
Manuals & Guides
The GKT-008 user manual.
The GPL-5010 user manual.
The GLN-5040A user manual.
The GIT-5060 user manual.
The User Manual of GSP-730
Quick Start Guide
The Quick Start Guide of GSP-730.
GRF-1300 User Manual (Student Version)
Brochure & Datasheet
The brochure of GSP-730, Chinese Version.
The datasheet of GSP-730, Chinese Version.
GSP-730 + GRF-1300A Datasheet
GSP-730 + GRF-1300A + USG Datasheet
GSP-730 & GRF-1300 Brochure (English Version)
GSP-730 & GRF-1300 Datasheet (Trad. Chinese Version)
GSP-730 & GRF-1300 Datasheet (English Version)
Can this also be used as a network analyzer to measure component bandwidth and amplifier?
A network analyzer can help the complex, or the vector, S parameter measurements. As I mentioned previously, a spectrum analyzer can only do scalar measurement, and the scalar measurement is the total results of the incident and the reflected waves. But if your application is for testing bandwidth or gain of component at both ends matched, spectrum analyzer can be helpful as network analyzer.
What is EMI and why is it important in device management?
Electromagnetic interference (EMI) occurs when the electromagnetic field in the environment interact with an implantable cardiac device, transiently disrupting or altering the device’s normal function. EMI constitutes one of the major concerns for patients with implanted cardiac devices.
Do pacemakers and ICDs (Implantable cardioverter-defibrillators) respond differently to EMI?
The most common EMI-ICD interaction and concern is that the EMI noise will be interpreted as ventricular fibrillation and initiate a shock. The pacing therapy from an ICD responds to EMI like a stand-alone pacemaker, except noise reversion in an ICD does not result in asynchronous pacing.
How can EMI affect the lead-device interface ?
Sometimes EMI (such as energy from electrocautery, cardioversion, or defrillation) can be shunted down the lead, resulting in thermal damage to the lead-tissue interface. This may result in a temporary or permanent rise in the stimulation threshold that is potentially detrimental.
What are EMI concerns in the work environment?
Potential sources of EMI in the work encironment include industrial welding machines, arc and spot welding, degaussing coils, and internal combustion engines. Industrial welding equipment exceeding 500A causes concern with cardiac devices. Low-amperage equipment (range 100-150 A) for hobby arc or spot welding likely does not cause significant interface.
An Overview of Spectrum Analyzer.
The spectrum analyzer is the most widely applied measuring equipment for wireless communication devices, components or systems. It measures and presents the frequency spectrum distribution of the RF signal. Both the frequency and amplitude information can be measured and read through a spectrum analyzer. Nowadays the digital communication technique dominates the wireless communication system, but measuring frequency through a spectrum analyzer is still considered as a significant methodology for RF testing in the industrial field. To satisfy various spectrum analyzing needs, GW Instek provides three models: 3GHz, 2.7GHz, and 1GHz. Equipped with exceptional high performance and affordable price, the products are designed for the applications of wireless product manufacturers, service, design, educational institutes, and so on.
What do ACPR, OCBW Stand for?
ACPR stands for Adjacent Channel Power Ratio and sometimes the ACLR as in Adjacent Channel Leakage Ratio. It's the measurement of adjacent channel power leakage related to main channel. Greater dB number means greater (better) rejection ratio between channels. The PU1, PU2, PL1 and PL2 are the power of upper and lower adjacent channels 1 and 2. Pch is the power of the main channel. OCBW OCBW stands for Occupied Bandwidth. It measures the bandwidth that takes the specified percentage in a channel. Figure 2 illustrates the example of a 99% OCBW. Smaller OCBW number at the specified % means more concentrated power distribution in the channel.
What Does an FM Signal Look Like on a Spectrum Analyzer?
FM signal has more complicated phenomenon than AM signal on the time domain which is presented in Figure1. The frequency is modulated to sweep with specified deviation, and it is very difficult to measure the deviation from the time domain. But on the frequency domain, the carrier frequency, modulating signal frequency, deviation and bandwidth can be figured out directly.
Why Do the Noise Floor and Phase Noise Change with Different RBW in Spectrum Analyzer?
A wider RBW filters in more noise compared to a narrow RBW, therefore the noise floor level is proportional to the RBW bandwidth as in the 10*log (RBW) rule. Refer to Figure 1 as an example, where the noise floor at 30k RBW is 10dB higher than 3k RBW. From the above rule, 10*log (30k/3k) = 10dB.
What is TG? How can an user properly operate it?
A TG (Tracking Generator) acts as a sweep generator and its frequency is synchronized to the spectrum analyzer. So it is very useful for frequency response measurement. Before it is performed, normalizing the test setup is required just like a network analyzer. Refer to the operation manual for the detailed procedure. Besides, when the spectrum analyzer is set in "ZERO SPAN" which measures only one frequency, the TG will also output a fixed frequency signal without frequency sweep. In this case, TG is working as a signal generator that offers the same frequency range as the spectrum analyzer.
What is the difference between Frequency Counter and Spectrum Analyzer?
A frequency counter measures signal frequency. Basically it is designed to measure fixed frequency. If a frequency modulated signal is under measurement, the frequency variation will result in unstable measurement. Besides, frequency counters tend to measure the fundamental frequency without harmonic information. Since spectrum analyzers present spectrum distribution using marker functions, spectrum analyzers can tell the frequency in any point of the displayed signal. Spectrum analyzers provide complete information that frequency counters cannot.
What is GKT-001 General Accessory Kit Set used for?
The Accessory kit set provides primary wires and terminals for RF signal measurement, particularly an attenuator against a longer RF signal. So that an instrument burns itself.
What is GKT-002 CATV Accessory Kit Set used for?
The Accessory kit set provides an operational accessory set for a 75 ohm system. The general RF system is categorized into a 50 ohm type. Once 75 ohm components are under test with a 50 ohm system, resistance incompatibility is possible and measurement error is there. For example, CATV/HDTV are both this type.
What is GKT-003 RLB Accessory Kit Set used for?
Besides RF cable and terminals for connection, a 50 ohm terminal is provided to enable a user to perform a TG Normalize job for its reference level accuracy, primarily with RLB-001, ReturnLoss Bridge connection kits.
When is the GKT-006A EMI Probe Accessory Kit Set available?
Since any standards and normalized tests are not followed by product research or calibration diagnosis tests, the interference source is only found to give a better understanding for its frequency and energy; a diagnosis measurement equipment usually comes with a spectrum analyzer, a probe and preamplifier (not necessary). The GKT-006A provides a probe set with more added convenience upon diagnosis measurement.
A Near Field Probe is used to find out the signal required for analysis on the circuit board before seeking a possible interference on the circuit board. So that a probe is used to detect whether the signal here on the circuit board or components is interference source or internal signal; notably, since a probe is connected thru a spectrum analyzer to components or circuit boards, before being connected, it shall be recommended to confirm whether the power under test is within the range on a spectrum analyzer, possibly the circuit test after powering on.
What is required for the ATA-002 antenna use?
The GSP and ATA-002 are connected with an optional terminal while the ATA-002 antenna is optional for gauge receiving. GW Instek currently provides ADP-001 (N-BNC) to connect with both of them. It is recommended to purchase altogether with antenna, so that an antenna is unable to connect with SA.
What does M/F for N(M)-BNC(F) on the catalog signify?
There are usually 2 expressions on various terminals: M/F or P/J. M signifies Male; F, Female; P, Plug; J, Jack. In Chinese, Female terminal and Male terminal are such, e.g., ADP-002 is SMA(J/F)-N(P/M), which means that SMA is female terminal, N, male terminal.
N, SMA, BNC terminal are available on your Catalog. What shall I do, if I would purchase, once I see F terminal, M terminal, etc., elsewhere?
Since the popular terminals are N, SMA and BNC in RF field, the above are the interfaces for which our company can provide. Users are specific groups (e.g., F terminal are usually for CATV, M terminal is applied in wireless radio or car antenna fields), F and M terminals are occasionally applicable though. GW Instek currently has no such equipment; please consult the sales or other channels for purchasing.
What is the ADP-101 used for?
The ADP-101 is a connector each for 75 and 50 ohm, available when a 75 ohm system accessory set is under test for the GSP, e.g., CATV signal intensity. If signal comes directly thru the GSP, there is measurement error given for test; if signal comes thru the ADP-101 and a 75 ohm system is configured in Amplitude option, there is more accurate measurement for data test.
How is the RLB-001 applicable in the GSP connection?
RLB-001 is a Return Loss Bridge, primarily for return loss test (the characteristic curve under test), Source / Coupler / Load on RLB 001 each are connected with Source: TG / Coupler: RF / Load: the terminal under test. The theory states that TG signal sends thru Load terminal then returns to Coupler with amounts, such a ration, a Return Loss data.
What is the ATA-001 specification?
The ATA-001 is a general purpose antenna with adjustable length. People use it in different applications with different length. It is hard to give specification for an adjustable length antenna. Actually the antenna suppliers neither offer the electrical specification because of the above reason. They only offer the dimension information.
What is VSWR?
VSWR (Voltage Standing Wave Radio) is used to measuring wireless signal for its effective transmission power passing thru power source, transmission line to load (e.g., thru power amplifier, transmission line to antenna finally).
An ideal system has 100% energy transmission, signal source impedance, transmission line, characteristic impedance of other connectors and load impedance are accurately compatible with one another. Since there is no interference for an ideal transmission process, Signal AC voltage remains the same on both terminals. Impedance has the least possibilities of 100% compatibilities. In terms of the actual system, the impedance is impossibly 100% compatible. In this way, the power reflects against the power source partially so that causes an interference, along the transmission line, then produces a voltage Peak and wave trough.
VSWR is applicable in measure voltage variations, the ration of the highest voltage against the lowest voltage in a transmission line. As voltage remains unchanged for an ideal system, the VSWR is 1:1. Once there’s a generated reflection, voltage remains changed, VSWR amplifies—e.g., 1.2:1 or 2:1.
VSWR signifies the voltage ration for a transmission line, VSWR = |V(max)|/|V(min)|
V(max) signifies the maximum signal voltage value for a transmission line, V(min), the minimum value.
The equation is represented in the way calculating an impedance VSWR = (1+Γ)/(1-Γ)
Γ is the voltage reflection coefficient near load ends, determined by load impedance (ZL) and source impedance.：
Γ = (ZL-Zo)/(ZL+Zo), if load is completely compatible with a transmission line, Γ = 0, VSWR = 1:1.
What does dB differs from dBm?
dB signifies power gain unit, a relative value. While calculating A power, whether it is larger than B or less than, followed by the equation 10 log(A/B)=10(logA-LogB). E.g., A power is 40dBm, B power, 43dBm. That is, A is 3dB larger than B.
dBm signifies an absolute power value unit, formula: 10log(power value/1mW). E.g., if the emission power is 1mW, in dBm the converted value is indicated in the way like: 10log(1mW/1mW)=0dBm; for 40W power, 10log(40W/1mW)=46dBm.
If I would like to measure unknown signals, how shall I measure?
If an end customer doesn’t know about signal frequency range yet the signal is sent stably (e.g., sent by SG signal):
In Full span open mode, spot the signal frequency using Peak search
Drag to the central display area using Peak to Center function
Set the Span and Reference Level to view the optimal frequency range
Spot the more adequate frequency point and signal intensity by pressing Peak Search once
If an end customer doesn’t know about a signal frequency range and the signal is instable hopping signal (e.g., the mobile signal is the hopping signal).
In Full span open mode, capture the frequency range using the PK Hold function of Trace
Drag the signal to the central display area until the waveform remains stable by using the Peak to center function of the Peak Search
Set the Span scope and Reference Level to view the optimal frequency range
Press Peak Search to acquire the optimal frequency point and signal intensity, while PK Hold enables a stable waveform.
How does a spectrum analyzer differ from an oscilloscope?
The analyzed signal by a spectrum analyzer is the signal field; power signifies the LCD vertical axis, in dBm; frequency signifies a horizontal axis, in Hz.
An oscilloscope analyzes the signal for its time zone, the LCD vertical axis signifies Voltage, in V; the horizontal axis signifies Time, in S (second).
What is TG, what’s it used for, how to use it?
TG(Tracking Generator) relatively equals a sweep signal generator, its frequency syncs with a spectrum analyzer. Therefore TG is often applicable in Frequency Response measurement. For normal operation, standardization follows measurement, eliminates noises (e.g., Cable/Adapter), then spot the frequency range by way of relative measurement. In the other hand, If the spectrum analyzer is set for Zero Span, SA only carries out with a single frequency measurement. TG outputs a fixed frequency rather than a sweep. In the mean time, TG equals a signal generator. The frequency is consistent with the central frequency on a spectrum analyzer.
How is the mathematical relation between dBuV and dBm?
The dBuV definition is such：Voltage value against 1uV, the X value，the formula：20logX=A(dBuV) (1) A signifies the power value in dBuV.
The dBm definition is such: Voltage value against 1mW, the X value, the formula：10logX=B(dBm) (2)B signifies the power value in dBm, called Decibel Milliwatt.
The both relation is indicated：dBm+107=dBuV，please seek data relevant to an actual deduction process.
What does the spectrum analyzer Dynamic Range mean?
The Dynamic Range is where a spectrum analyzer has the capabilities to handle various signals simultaneously. The maximum Dynamic Range hold value is dependant upon the measurement being actually carried out with. The lower Dynamic Range hold limit is determined by natural noise or phase noise. The upper Dynamic Range hold limit is determined by 1dB compression point or distortion caused by a spectrum analyzer overload.
What is Third Inter-Modulation?
While a system works already within a non linear field, there generates a harmonic. While two tone signals are input simultaneously, the third inter-modulation harmonic is notably noted. As 1dB signal increases on the fundamental frequency, there generates 3dB Third Inter-Modulation. Particularly the 2 frequency come close together, each 2f1-f2 and 2f2-f1 for the Third Inter-Modulation is relatively close to f1 and f2. Particularly while f1 and f2 come closer, the more difficult the Third Inter-Modulation is unable to be filtered out by a wave filter completely.
Experiment 1: Basic operation of a spectrum analyzer
Experiment 2: Measuring a baseband waveform
Experiment 3: Difference Baseband Waveforms and their Harmonic Measurement
Experiment 4: Measurement of the RF carrier
Experiment 5: AM Signal Measurement
Experiment 6: FM Signal Measurement
Experiment 7: Using a Spectrum Analyzer in Communication Systems
Experiment 8: Measurement of communication products
Experiment 9: Production Line Applications
GSP-730 & GRF-1300 E-Teaching System Demonstration