Products for Astronomy, Meteorology and Physics.

GT1 – GoTo stepper controller for telescope mounts

The GT1 is a stepper motor controller with goto functionality.

The GT1 can be configured to drive any kind of mount, since it is capable to adapt on any gear ratio from the configuration software.

You can change the gear ratio settings, microstep resolution, motor winding configuration and maximum goto/slew speed.

Each motor winding can be supplied by the GT1 with a maximum of 1 Ampere current. The GT1 supports overvoltage up to 18v for greater torque.

The GT1 is also compatible with the Skywatcher SynScan handset, it is EQMOD-ready, so you can use it standalone or by PC connection using software like SkyCharts, KStars or other software.

It is also possible to drive the GT1 from the smartphone using INDI and KStars for Android.

The precision in low speed, including autoguide and sidereal tracking, is 64 microsteps.

The maximum speed has no limit, but must be appropriate to the load and weight of the telescope and the power of the engines.

The configuration software can set motor parameters, go-to acceleration and maximum speed.


  • Compatibility: SynScan, EQMOD, ASCOM, INDI
  • max steps: 16777216 – Automatic calculation during configuration
  • maximum speed: Automatic calculation during configuration – optimizable
  • microstepping resolution: Automatic calculation during configuration – depends on total gear ratio
  • Inputs:
    • ST4 Autoguider – RJ 12
    • HC/EQDIR – RJ45
    • 12v Power – 5mm Jack
  • Outputs:
    • Right Ascension – RJ12
    • Declination – RJ12
  • Recommended power supply: 12v@3000mA
  • Extras:
    • Editable motor winding configuration by software
    • Custom parameters saved read-only, editable by the configuration software

The configuration software – downloadable here – can set motor parameters, go-to acceleration and maximum speed.

Read the GT1 Usage Guide for informations on the correct usage of the GT1 controller

Availability: In stock

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PM5 – 4 channel 5A Power drive for the GT1

The PM5 can drive 4 digital/PWM outputs reaching as high current as 5A per channel, switching in range of 0-5/0-24 volts at a maximum frequency of 10KHz.

The PM5 is compatible with a single motor output of the GT1 at input end, while the output connector is compatible with the old standard DB9 port, so old astronomical mountings or motors are suitable for use.

The PM5 also is well insulated, using an optocoupler as input stage, can be over/lower volted safely.

It has these features and connectors:

  • RJ12 digital input connector, positive active
  • Coaxial supply voltage, center positive
  • DB9 output connector
  • High current and voltage: up to 5A/24V impulsive per channel
  • Optical input insulation

Read the PM5 Usage Guide for informations on the correct usage of the PM5 driver

Availability: In stock


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XC series quantum correlators

The AHP XC series includes quantum counters, crosscorrelators and autocorrelators.
The XC series products acts as counter, autocorrelator and crosscorrelator with up to 256 inputs and a maximum bandwidth of 200MHz, reaching up to 32640 baselines cross-correlated on single quantum level.

They support three operating modes:

  • Counter: each input’s pulses are counted within the sampling time and the totals are reported by the serial port each frame.
  • Autocorrelator: to obtain the power spectra of the pulse fluxes of each input.
  • Crosscorrelator: each input pulse is cross-correlated with other inputs’ pulses, with head and tail lag reports.

Each input has an independent internal adjustable delay.
Intensity correlation can be applied to photonics, interferometry, proximity sensing, quantum computing and radiation spectrography.
AHP offers both optical and radio options for intensity interferometers with its radio detectors and PMT assemblies, the C-language SDK and support for your projects.

AHP XC general specifications:

  • Up to 256 inputs for a maximum of 32640 baselines
  • Up to 4096 channels (8193 in cross-correlation mode) per line
  • 1 to 16 tau multiplier, power factor of 2
  • 5ns minimum pulse width
  • Up to 200MHz bandwidth
  • Sampling rate up to 200Msps
  • Input resolution ranging from 1 bit to sampling bits
  • Autocorrelation multi-tau mode
  • Crosscorrelation multi-tau mode
  • Independent delay lines selection for autocorrelator and crosscorrelator modes
  • Direct reading of pulse, autocorrelation and crosscorrelation counts
  • Correlation counts readout of all baselines each serial frame
  • 57.6, 115.2, 230.4, 460.8, 2000 Kbaud serial rates
  • Connectors:
    • TTL UART 3.5mm jack communication port
    • External input line with independent switching pass-through on each input
    • External 10MHz clock input line
    • 10MHz Clock monitor output line for optimal clock tuning
    • Frame end output line for external hardware synchronization
    • Sampling clock output line for external hardware synchronization
    • Strobe input line to start integration from external hardware
    • RJ11 connectors standard for easy plug
  • Open Source C SDK
  • Open Source test GUI software
  • Buy options:
    • XC8
      • 8 inputs
      • counter, autocorrelator, crosscorrelator
      • 28 baselines
      • 2048 channels
      • 24bits capacity
      • 82Hz maximum frame rate
      • 100 Mcps maximum count rate
      • 100MHz  sampling clock
      • 10MHz monitor clock output
      • frame sync output
      • 10MHz external clock input (software enabled)
      • External integration strobe input
    • XC32
      • 32 inputs
      • counter, autocorrelator, crosscorrelator
      • 496 baselines
      • 180 channels
      • 16bits capacity
      • 1.5 Mcps maximum count rate
      • 22.8 maximum frame rate
      • 25MHz  sampling clock
      • 10MHz monitor clock output
      • frame sync output
      • 10MHz external clock input (software enabled)
      • External integration strobe input
  • Custom designs are accepted

Availability: 5 weeks

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HSP17 Photomultiplier Assemblies

The HSP17 is a photomultiplier assembly.
The HSP17 offers various sensibility and spectral response options.
The assembly contains the power supply and the readout circuitry.
Its connector is compatible with the XC series cross-correlators.
Power supply and pulse readout by using a single cable.
It has a front optical entrance and can house a thermal cooler or specific adaptive optics.
The light entrance has a C-type threaded input, compatible with many optical path laboratory standards.


  • Areas of application:
    • Astronomy
    • Optical Spectroscopy
    • Quantum Spectroscopy
    • Gamma Spectroscopy
    • Electron Microscopy
    • Photon Counting
    • Light Measurement
    • High-Speed Photometry
    • Intensity Interferometry
    • Cherenkov Radiation Sensing
  • RJ11 input plug
    • PMT PSU voltage: 115vac
    • Readout circuitry voltage: 3.3v
    • TTL output voltage: 3.3v
  • Options:
    • HSP17-7
      • Spectral range: 300nm – 600nm
      • Sensitivity: 680A/mW
      • Dark counts: ~300cps
      • Count rate: ~1Mcps
      • Sensible area: 10x20mm
    • HSP17-9
      • Spectral range: 380nm – 420nm
      • Sensitivity: 68A/mW
      • Dark counts: ~300cps
      • Count rate: ~0.7Mcps
      • Sensible area: ø50mm
  • Light and electrically shielded housing
  • Light entrance: C-type threaded (front)
  • Cooling or mechanics: Space within the PMT and the housing for custom design

Availability: 5 weeks

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