Vector Signal Analyzer 


A6 is a vector signal analyzer with compact design. With excellent testing performance and measurement sensitivity, A6 satisfies the testing requirements of the majority of RF signals. A6 satisfies the needs of general spectrum test, it supports signal demodulation like LTE, FM, Digital Signals. In terms of system integration, PCB version module product is available and API library is provided for secondary development.

Category: .
  • Frequency range: 9kHz to 6GHz
  • Signal demodulation: Digital signal, FM, NB-IoT and LTE
  • DANL: -168 dBm @1GHz (Sensitivity set to High, normalized to 1Hz)
  • Resolution bandwidth: 10Hz to 5MHz
  • Signal storage depth of 1Gbit for signal capture and analysis
  • API library is provided for secondary development

Main Functions

• General Spectrum Analysis

For conventional stable or periodic signals, the A6 provides broadband spectrum testing, including frequency and power measurements.

• Waterfall Display

A6 can display the frequency and amplitude change of the spectrum as a function of time in the form of waterfall display (Spectrogram), making the spectrum change at a glance.

• Digital Signal Demodulation

A6 supports ASK\PSK\FSK\QAM digital signal demodulation. Provide information such as spectrum, constellation, and EVM.

• LTE Signal Demodulation

A6 provides TDD-LTE and FDD-LTE downlink signal demodulation. Obtain spectrum records, time-frequency resource mapping, constellation, channel decoding, EVM, etc.

• NB-IoT Signal Demodulation

A6 provides air interface information demodulation for NBIoT. It can present multi-cell coverage and interference in the current wireless environment.

• FM Demodulation

A6 provides FM demodulation. The demodulated audio data can be stored in computer.

• Zero Span Mode

When analyzing the time domain characteristics of signal, user can set the span of instrument to 0 and enter zero span mode (like the oscilloscope). Video trigger can be used in this mode.

Typical Application

• Laboratory RF test

A6 vector signal analyzer can perform RF testing in the laboratory. A6 combines G6 vector signal source can test intermodulation distortion of amplifiers, mixers, and receivers. This system can also test antennas, amplifiers, and attenuators’ performance such as bandwidth, frequency response, and gain.

• RF & Microwave Teaching Application

A6 vector signal analyzer, combine with G6 vector signal source, enables a demonstration of the testing of RF microwave devices. It reduces the complexity of RF microwave professional teaching and meets the teaching needs of telecom and electronic engineering related majors.

• Compact Size & Fast Deployment

A6 is compact and easy to set up. User can easily carry to field and quickly build the test environment.

• System Integration & Secondary Development

A6 vector signal analyzer has a small size, superior specifications, comprehensive telecommunication & general demodulation support, and an open API interface. It also offers three different product models: full-size USB module, small-size USB module and PCB module. Thus, A6 can meet the system integration needs of different users.



Low, Medium and High


Digital signals, FM, NB-IoT and LTE (AM, GSM, and WCDMA will be supported in the future)


Frequency Range

9kHz to 6GHz

Frequenc Reference

Aging rate: ±1ppm

Readout Accuracy

±( (readout frequency + 1GHz) x Frequency
Reference + Frequency Span Accuracy x Span)

Frequency Span Accuracy


Sweep Time

1.1ms to 1600s

2.69ms to 1600s, zero span

Resolution bandwidth

RBW Range

10Hz to 5MHz, (1-2-3-5-10 Sequence)

RBW Accuracy


RBW1MHz, ±2%


Measuring Range

Display Average Noise Level to +20dBm

Input Attenuator Range

0 to 30dB, 1dB Step

Maximum Safe Input Level

Sensitivity: +30dBm (Low)

Sensitivity: 0dBm (Medium)

Sensitivity: -20dBm (High)

Reference Level Range

-140 dBm to +20dBm

-190dBm to +70dBm (Ref level offset: ON)

Amplitude Accuracy

ATT set to 0dB, Input Signal: -5 to -30 dBm; Detector set to Positive; Sensitivity set to
Low; RBW Auto-Coupled, all other settings Auto-Coupled, 23±5℃

Half hour warm-up required.


RBW Switching Uncertainty


Input Attenuator Uncertainty


Accuracy of Reference Level

Reference level: ≥-60dBm, ±0.8dB

Display Average Noise Level (DANL) @1GHz

Terminated, Detector set to Positive, Trace Average set to 1000, Span set to
50kHz, Ref set to -100dBm, all other settings auto-coupled, 23±5

Normalized to 1 Hz RBW

Sensitivity: Low

-131dBm/Hz (typically -133dBm/Hz)

Sensitivity: Medium

-149dBm/Hz (typically -151dBm/Hz)

Sensitivity: High

-166dBm/Hz (typically -168dBm/Hz)

Residual Response


Input-Related Response

9kHz to 700MHz

700MHz to 900MHz



900MHz to 1.3GHz

1.3GHz to 2.2GHz



2.2GHz to 2.7GHz

2.7GHz to 2.9GHz



2.9GHz to 3.3G


3.3GHz to 6.0GHz


Second Harmonic Distortion

1.6GHz   -70dBc

Third-Order Intercept (TOI)

-10dBm tones, 1MHz apart, Sensitivity set to low, Ref set to -10 dBm



+5dBm (nominal)

Phase Noise @1GHz

-95dBc/Hz, @10kHz (typically -98dBc/Hz)

-123dBc/Hz, @1MHz (typically -125dBc/Hz)


Maximum storage depth


Data format

I/Q two-way, 16bit


2.5Mz, 5MHz, 10MHz, 20MHz

Sampling rate

30.72MHz, 15.36MHz, 7.68MHz, and 3.84MHz


OS for Software

Windows7,  Windows 10

Power Supply Current

2A Max


Operating: 0°C to 50°C

Storage: -20°C to 70°C

Connect interface

RF output: N-type, 50 Ω
PC connect:USB type-C
Power connect: DC12V 

Dimension and Weight

180mm×50mm×290mm, 1.8kg

Technical specifications

This technical specifications include the influence of probability distribution, measurement uncertainty and environmental factors on the instrument performance. It guarantees the performance under the following conditions.

  • The instrument is ON and warmed up for 30 min
  • The instrument internal reference signal is applied

Testing temperature is 23±5 ºC, unless other specific condition applied.

Typical value

Additional description does not cover all performance information of the product guarantee. Unless otherwise specified, the typical value refers to the indicator or technical specification with which more than 80% of products comply under 23 ± 5 ºC. The measurement uncertainty is excluded. A6 should be within the calibration period.

Nominal value

The nominal value refers to the characteristic description or design range. It is not tested or covered by the product. A6 should be within the calibration period.




A6 Vector Signal Analyzer (9kHz to 6GHz)

Accessories Model



Power adapter


Power cable (China standard)


Power cable (US standard)


Power cable (UK standard)


Power cable (US standard)


USB cable


USB disk


Spectrum analysis and playback software


Waterfall display and FM demodulaiton



NB-IoT demodulation license


IQ signal capture license


TD-LTE demodulation license


FDD-LTE demodulation license


Digital demodulation license


10MHz Ref IN/OUT Option


Universal power adapter

Transcom A6 Signal Hound BB60C
Frequency range 9kHz to 6GHz 9kHz to 6GHz
RBW range 10Hz to 5MHz, (1-2-3-5-10 Sequence) 10 Hz to 10 MHz
Aging rate ±1ppm ±1ppm
Measuring Range Display average noise level to +20dBm Display average noise level to +10dBm
DANL Sensitivity: Low         -131dBm/Hz (typically -133dBm/Hz)
Sensitivity: Medium  -149dBm/Hz (typically -151dBm/Hz)
Sensitivity: High       -166dBm/Hz (typically -168dBm/Hz)
9kHz to 500kHz  –140dBm/Hz
500kHz to 10MHz  –154dBm/Hz
10MHz to 6GHz  –158dBm/Hz + 1.1dB/GHz
Phase Noise @1GHz -95dBc/Hz, @10kHz (typically -98dBc/Hz)
-123dBc/Hz, @1MHz (typically -125dBc/Hz)
Frequency Offset       dBc/Hz
100 Hz                 –70
1 kHz                  –76
10 kHz                –83
100 kHz                –93
1 MHz                 –117
Demodulator Digital signals, FM, NB-IoT and LTE (AM, GSM, and WCDMA will be supported in the future)
Temperature Opearting: 0°C to 50°C
Storage: -20°C to 70°C
   32°F to 149°F (0°C to +65°C) Standard;  –40°F to 149°F (–40°C to +65°C) for Option
Dimension and weight 180×50×290(mm), 1.8kg 8.63” x 3.19” x 1.19” (219mm x 81mm x 30mm); Net, 1.10 lbs. (0.50 kg)

Beidou system interference signal check

BeiDou Navigation Satellite System is developed rapidly these years, however it still faces some problems now. One of the problem is signal interference, just like the similar like the GPS. One of GNSS station of BeiDou System found that their signal will be interfered at certain time everyday, so they invited Transcom Instruments to do Trouble Shooting for them. Trasncom Instruments set a simple test in the field, SpecMini was used as Spectrum Analyzer to do the interference location, A6 was used for recording IQ data, which will be used for further analytic. After sampling and inteference location, the interference source was found: One BTS belongs to one operator in China.

Teaching Application

A6 is compatiable and easy to use, it is wildly used in universities for teaching task. Students can learn about signal demodulation and analysis on A6.