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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesThe Anritsu 68387B is a synthesized RF signal generator and frequency sweeper with a nominal 10 MHz to 60 GHz range. Despite catalog listings that call it a “waveform generator,” it is not a modern arbitrary-waveform or vector signal generator: its strengths are microwave carrier generation, frequency and power sweeps, and analog AM, FM and pulse modulation. Its output power falls substantially in the highest bands, and options, connectors and calibration condition matter when assessing a particular unit.
What the Anritsu 68387B is
The 68387B belongs to Anritsu’s 68300B performance series. It is a single-channel synthesized microwave source for generating continuous-wave (CW) signals, sweeping frequency and applying analog modulation. The nominal range is 10 MHz to 60 GHz; the original model table expresses its lower limit as 0.01 GHz. The manufacturer-family documentation describes a synthesized signal generator, while some catalog pages classify it as a waveform generator. That label should not be read as evidence of modern IQ modulation or general-purpose arbitrary-waveform playback.
The specification lists internal modulation waveforms such as sine, square, triangle, positive and negative ramps, Gaussian noise and uniform noise. User-defined modulation waveforms are associated with Option 10 and require a computer/controller and software. This is a narrower capability than a contemporary AWG or vector signal generator. See the 68387B specification PDF and the 68300B operation manual.
Anritsu 68387B specifications at a glance
| Specification | 68387B |
|---|---|
| Instrument type | Synthesized RF signal generator and sweeper |
| Frequency range | 10 MHz to 60 GHz |
| RF channels | One |
| Operating modes | CW, step sweep, broad/full-range sweep and analog/manual sweep |
| Modulation | AM, FM, pulse modulation and phase modulation on applicable configurations |
| Frequency resolution | 0.1 Hz with Option 11 |
| Remote interface | GPIB / IEEE-488; SCPI depends on configuration |
| RF connector | Type K female on models up to 40 GHz; Type V female above 40 GHz. Verify the particular unit. |
| Power input | 90–132 VAC or 180–264 VAC, 49–440 Hz; up to 400 VA |
| Dimensions | Approximately 429 × 133 × 597 mm |
| Mass | Up to approximately 23 kg (50 lb) |
Dimensions and mass are approximate family/model specifications, not a guarantee for every configuration. Specifications and capabilities can depend on frequency band and installed options. The detailed figures are in the Anritsu specification PDF and operation manual.
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- Main Chip is Max2870，Frequency range: 23.5mhz-6000mhz
- Mode: Both Single frequency mode and Sweep mode can be set.
- Automatically save data, support automatic saving after power failure, and automatically execute the previous work function after power on.
- Minimum resolution: 10kHz，Minimum frequency sweep interval: 1ms,Can meet the needs of more high precision.
- Screen: 2.8 inch Touching LCD Screen,Full touch control.
Output power by frequency band
The advertised 60 GHz upper limit does not mean that the generator provides the same power across its range. The specification gives these maximum output levels:
| Frequency range | Maximum output | Maximum with step attenuator |
|---|---|---|
| 10 MHz to 2 GHz | +12 dBm | +10 dBm |
| Above 2 GHz to 20 GHz | +10 dBm | +8.5 dBm |
| Above 20 GHz to 40 GHz | +2.5 dBm | 0 dBm |
| Above 40 GHz to 50 GHz | +2 dBm | −1.5 dBm |
| Above 50 GHz to 60 GHz | +2 dBm | −2 dBm |
These are band-specific maximums, not a single full-band rating. In particular, applications above 40 GHz should be planned around the lower available output. If the system needs more drive at 50–60 GHz, determine whether an external amplifier or another source is appropriate. Figures are from the 68387B specifications.
Modulation and waveform capabilities
AM
The specification describes external linear and logarithmic AM through front- or rear-panel BNC input, with selectable 50-ohm or 600-ohm input impedance. Linear AM depth is 0–90% typical; logarithmic AM is up to 20 dB typical. AM bandwidth is at least DC to 50 kHz, with 100 kHz typical. Maximum external input is ±1 V. These figures are test-condition-dependent; consult the specification for the conditions relevant to a particular measurement.
FM
Narrow and wide FM modes are documented, with approximate maximum deviations of ±10 MHz and ±100 MHz respectively. Sensitivity and usable rate depend on the selected mode, and the external modulation input is via front- or rear-panel BNC with selectable 50-ohm or 600-ohm impedance. Do not treat the two deviation figures as interchangeable or as a complete description of FM bandwidth, noise or locked performance.
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- 【HIGH PERFORMANCE SIGNAL GENERATOR】:The TSG-17 RF signal generator offers a wide frequency range from 100kHz to 150MHz, with six distinct frequency bands for precise signal output. Its low phase noise ensures excellent signal purity, making it ideal for radio frequency testing tools and precision applications.
- 【VERSATILE MODULATION OPTIONS】:Equipped with AM and FM modulation, the TSG-17 provides flexibility to meet diverse testing needs. Whether for general signal generation or specific radio frequency signal testing, it supports a wide range of applications, from standard RF testing to more complex signal analyses.
- 【DURABLE AND STABLE DESIGN】:Crafted from high-quality metal and finished with a plastic spraying process, this signal generator is designed for durability. It remains stable even in demanding environments, making it perfect for long-term use in laboratories, repair shops, or production lines.
- 【EASY OPERATION AND INTUITIVE CONTROL】:The TSG-17 signal generator features a user-friendly front panel with clear, labeled controls. With its intuitive knob and buttons, it allows for quick and precise parameter adjustments, ensuring you can operate the device efficiently without confusion.
- 【COMPACT AND PORTABLE】:With a convenient top handle and non-slip mats, the TSG-17 is both portable and stable, ensuring ease of transport and secure placement during use. It’s a perfect choice for professionals who need reliable low-frequency signal generators in a compact form.
Phase modulation
Phase modulation is listed for applicable configurations. Confirm the installed configuration and its specifications rather than assuming every 68387B has the same phase-modulation capability.
Internal modulation and user-defined waveforms
Internal modulation includes sine, square, triangle, positive ramp, negative ramp, Gaussian noise and uniform noise. The internal FM generator’s sine rates are specified from 0.1 Hz to 1 MHz; other listed waveforms are specified from 0.1 Hz to 100 kHz, with 0.1 Hz resolution. Its output is on a rear-panel BNC. Option 10 provides user-defined waveform capability when used with the required controller and software. Neither the standard internal waveforms nor Option 10 make the instrument equivalent to a current high-bandwidth AWG with IQ waveform playback.
Pulse modulation
The instrument supports external or internal pulse modulation. The family documentation describes TTL-compatible positive-true or negative-true logic and internal triggered, gated, delayed, singlet, doublet, triplet and quadruplet modes. PRF limits extend to 10 MHz in unleveled operation and 5 MHz in levelled operation; pulse width depends on frequency and clock selection. The relevant pulse specification gives rise/fall time below 10 ns, with a typical value below 5 ns. Check the band and levelled/unlevelled conditions in the specification before treating these as application guarantees.
Sweep functions and level control
The 68387B can generate fixed CW signals and perform broad or narrow frequency sweeps, step sweeps and analog/manual sweeps. It also supports power sweeps. The specification lists power-step sizes down to 0.01 dB and step dwell times from 1 ms to 99 seconds. A step-attenuator change can add approximately 20 ms of dwell, so a fast sweep that crosses an attenuator setting may not behave like one that stays within a setting.
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- Wide Frequency Range: 35Mhz-4400Mhz, making it suitable for a variety of applications.
- Dual Modes: Single Frequency and Sweep mode, provide greater flexibility.
- Wave From: Sine Wave, it is Not strictly Wave with some noise wave. Power: about 1mw.
- Power off memory: When the power is off, the parameters will be saved and will continue to work at the previous frequency after being powered on again.
- Convenient Power Supply: Powered by a mobile charger or Power bank or usb connecting to a computer.
Output level resolution is 0.01 dB. The documentation gives a minimum levelled output generally around −15 dBm without an attenuator, with lower typical values, and levels down to approximately −115 dBm with an attenuator, subject to model and configuration exceptions. Typical level-switching time is below 1 ms without a step-attenuator change and below 20 ms when one occurs. These are instrument specifications, not a substitute for a calibration certificate or verification at the output connector.
Options: verify the actual unit
Options documented for the 682XXB/683XXB family can change functionality. A model number alone does not establish which options are installed.
| Option | Documented function |
|---|---|
| 10 | User-defined modulation waveforms; requires a computer/controller and software |
| 11 | 0.1 Hz frequency resolution |
| 14 | Compatibility with the Anritsu 360B VNA console |
| 15B | High-power output configuration |
| 16 | High-stability ovenized time base |
| 17A | No front panel, for remote-control applications |
| 18 | Millimeter-wave source-module bias output |
| 19 | SCPI programmability |
| 20 | SCAN modulator; limited to specified model groups and subject to option restrictions |
These descriptions are from the 682XXB/683XXB family operation manual. Confirm applicability to the 68387B and any option restrictions in the manual and on the individual instrument.
GPIB control and documentation
The documented remote interface is GPIB/IEEE-488. The family document set includes a GPIB programming manual and a separate SCPI programming manual; SCPI programmability is associated with Option 19 in the family option documentation. Do not assume that every unit has SCPI, native USB, Ethernet, LAN or LXI control. A modern computer may need a USB-to-GPIB controller and compatible drivers, and the complete automation stack should be checked before purchase.
Rank #4
- Range :Built-in 800Hz audio modulation, with the analog digital CTCSS function. Increase the analog sub-tone digital sub-tone function, strong anti-interference ability, is not interfered. The unit is DBM. General hand sensitivity is -120DBM to -130DBM.
- Range :Built-in 800Hz audio modulation, with the analog digital CTCSS function. Increase the analog sub-tone digital sub-tone function, strong anti-interference ability, is not interfered. The unit is DBM. General hand sensitivity is -120DBM to -130DBM.
- Wide Application : Suitable for FM debugging. Generator is widely used in aviation, communication, automotive electronics, manufacturing and other fields. It is absolutely forbidden to press the intercom button to transmit when testing. (self-matching power supply 8V-12V power supply polarity is positive and negative)
- Function : Generator 0.5MHz-470MHz RF Generator Meter Tester for FM Radio Debug Digital CTCSS Singal Output. The accuracy comparison between this source and professional comprehensive measurement is basically the same. The accuracy is very high. Can test the actual receiving sensitivity.
- Test methods: During the test, the frequency of the source input transceiver is first set to -100DB or any value. The intercom has audio output and then reduces the output strength of the source. For example, the -120DB just heard the intercom audio but there was noise. The audio just hears that the -120DB value of this output is the receiving sensitivity of the radio.
The operation manual notes that front-panel operation and IEEE-488 remote control are available, with power-on/standby functions excepted from remote control. A seller’s document list for the model identifies the available manuals and is useful for locating them: National Test Equipment’s 68387B document listing. For related Anritsu legacy-family driver and documentation context, see the Anritsu MG3690B Series downloads page; it does not establish direct compatibility for every 68387B setup.
RF connector and accessories
The specification identifies Type K female connectors on models up to 40 GHz and Type V female on models above 40 GHz. Because the 68387B reaches 60 GHz, verify the physical connector and serial-number configuration rather than ordering cables or adapters from a generic product image. Above 40 GHz, connector condition, transitions, cable quality and calibrated power sensors all affect whether a measurement is useful. A setup that only needs lower bands may have different accessory requirements.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to check before buying a used 68387B
A successful power-on is not evidence that a used generator meets its frequency, level, phase-noise, flatness, modulation or pulse specifications. Ask the seller for evidence tied to the bands and functions you will actually use.
- Request the complete serial number and photographs of the model, rear-panel labels and installed-option labels.
- Obtain the installed-option list, including confirmation of the step attenuator, time-base option and front-panel configuration.
- Ask for a recent calibration certificate or performance-verification report covering your required frequency bands, especially above 40 GHz.
- Request test evidence for output power, frequency accuracy and any modulation or pulse functions essential to your application; a general self-test alone may not establish those results.
- Inspect the RF connector for wear or damage and confirm whether it is Type K or Type V. Check that the seller includes the cables and adapters you need.
- Verify GPIB operation and the command set supported by the unit. Confirm that any intended USB-to-GPIB controller, software and operating system work together.
- Check front-panel controls and display, power-up behavior and included modulation cables. Confirm the AC supply is compatible with the unit’s rated input.
- Ask for the last calibration date, laboratory, return terms and any warranty. Used listings are quote-based and configuration-dependent; no single current price is established by the available seller listings.
For calibration-service availability, Tektronix lists Anritsu instruments for quote-based service on its Anritsu calibration page. Confirm service coverage for the specific model, frequency range and required procedure directly.
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Best Value
- Highly cost-effective economical RF signal generator:Up to -112 dBc/Hz (typical) phase noise;Up to +20 dBm (typical) maximum output power;Higher level of amplitude accuracy, up to 0.5 dB (typical);Superb signal stability
- Functions almost matching those of high-level RF signal generators:Flexible frequency and amplitude sweep functions;Complete AM/FM/ØM analog modulation functions;Standard LF output function;Powerful pulse modulation function;Open vector modulation function;System flatness calibration function;Simple and easy to operate
- Special design ensuring its reliability and durability:Use electronic attenuator to avoid wearing;Specially designed protection functions;Digital ALC circuit;Simple structure
- Smallest in size among the like products:Occupy the least workbench space;Occupy less rack space;Light weight; the handle offers comfortable grip
Is the 68387B a good choice for your application?
| Use case | Fit | What to confirm |
|---|---|---|
| Legacy microwave receiver, filter, amplifier or detector testing | Good candidate | Required band, output level, sweep behavior and calibration |
| Local-oscillator substitution or swept-frequency measurements | Good candidate where GPIB and analog operation suit the setup | Automation compatibility, frequency accuracy and cable ecosystem |
| Analog AM/FM or pulse susceptibility tests | Potentially suitable | Mode-specific deviation, rate, pulse width and levelled/unlevelled limits |
| Measurements at 50–60 GHz | Conditional | Low available maximum output, Type V connection, connector condition and calibration above 40 GHz |
| 5G/6G or other complex IQ waveform playback | Poor fit | Use a vector signal generator with the required bandwidth and waveform support |
| Modern automated test requiring native LAN/LXI | Poor fit without an integration plan | GPIB adapter, drivers, command support and software maintenance |
| Audio, baseband or general low-frequency AWG work | Usually excessive and unsuitable | Choose a conventional function or arbitrary-waveform generator instead |
Alternatives and selection criteria
For a newer analog microwave source
Anritsu’s MG3690B and MG3690C families are examples to compare when newer analog-source functionality or support is important. They are not automatic drop-in replacements: compare frequency coverage, output power, modulation, connectors, remote interfaces and software with the actual test system. Anritsu’s MG3690B Series downloads page includes legacy-family documentation and driver context, but does not guarantee compatibility for a specific application.
For IQ or communications waveforms
Choose a vector signal generator if the requirement is IQ modulation, modern communications-standard signals, radar waveforms or high-bandwidth arbitrary modulation. Compare carrier range, instantaneous and IQ bandwidth, waveform memory and formats, phase noise, interfaces, calibration and service support.
For low-frequency arbitrary waveforms
A conventional function or arbitrary-waveform generator is usually a more appropriate tool for audio, baseband, logic and low-frequency laboratory signals. The 68387B’s microwave coverage does not make it a replacement for a high-bandwidth modern AWG.
Compare the requirement, not just the headline frequency
- Required frequency bands and output power at each band
- CW, sweep, analog modulation or vector modulation requirements
- Phase-noise and frequency-reference stability needs
- Output connector and existing cable, adapter and sensor inventory
- Frequency resolution, calibration availability and repairability
- Remote-control interface, command compatibility and integration effort
Datasheet and manuals
The commonly circulated 68387B specification PDF is dated February 2002. The 68300B operation manual is dated July 2003 in available equipment-document listings. These are legacy documents, so match the manual and option descriptions to the unit’s model, serial number and installed configuration.
Quick Recap
- Anritsu 68387B specifications PDF
- 68300B operation manual
- 68387B document listing, including programming-manual links
- 682XXB/683XXB family option and operation documentation
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
