Avanti Quartz Transducer Simulator

Avanti Quartz Transducer Simulator - Specification.

GENERAL

The Avanti Quartz Transducer Simulator generates 3 crystal controlled frequencies:
A pressure frequency (PF), a temperature frequency (TF) and a reference signal (REF).
Direct Digital Synthesis (DDS) is employed, which provides variable yet quartz-stable signals with very low phase noise.

FREQUENCIES

PF / TF = 0...99999 Hz, resolution 0.005 Hz
REF = 7.200 MHz (second reference frequency on request)
Accuracy < 10 ppm, Drift < 2.5 ppm

OPERATION MODES

PF and TF can be set independently without any interaction:

Enter constant frequencies directly in Hz.
Step up or down in 0.1 Hz steps.
Sweep continuously up or down between two frequency limits (saw tooth). The sweep speed can be set from 0.001 Hz per second to 99.999 Hz per second. The frequency is updated every 100ms in increments as small as 0.005 Hz.
Store and recall up to 10 different setups.
Generate a frequency profile with up to 10 steps by automatically recalling different setups in sequence. The duration of each step can be set individually between 1 minute and 9999 minutes.

EXTERNAL CONNECTIONS

2.1mm connector for external power supply (12V, 100mA).
9-way D-type socket for connection to the logging system (eg. memory board), carrying PF, TF, REF, ground, 12V supply and a control line to enable/disable the outputs.
BNC socket for monitoring PF and TF, eg. with a frequency counter.

CONTROLS AND INDICATORS

There are 5 rotary switches reading 0..9, through which frequencies are entered in Hz and sweep speeds in milli-Hz per second. The rotary switches are also used for selecting the memory number when storing/recalling setups and for specifying the step duration in profile mode.
There are 4 push buttons: PF/TF to enter data for the pressure or temperature channel and UP/DWN to step up and down or start/stop a sweep. The UP/DWN buttons are also used for storing/recalling setups and for starting profile mode.
There are 6 toggle switches: The PWR switch turns the simulator on and off. A battery option (6 AA-cells) can be fitted on request, in which case the simulator runs automatically on batteries if no external power is applied. The MODE switch controls the frequency outputs. The outputs can be either permanently active (CONTI) or controlled through an external signal (eg. the tool switch of a memory board). The REF/TF/PF switches select the signal coupling (AC/DC) and allow channels to be switched on or off individually. The BNC switch selects PF or TF to be routed to the BNC socket.
There are 2 LEDs: PWR will light up when the simulator is switched on. MODE will light, when the signal outputs are active. It is also used to acknowledge data entry.

ENCLOSURE

Aluminium enclosure measuring 165 x 121 x 56 mm.

APPLICATIONS

Test accuracy and resolution of logging systems using constant frequencies.
Test logging systems for abnormalities by sweeping very slowly over the entire frequency range.
Test the time keeping of logging systems by choosing sweep parameters which produce saw tooth edges at predetermined times (eg. every 10 minutes).

FRONT PANEL LAYOUT

BACK

HOME