The 6125 contains two-channels of high-performance, programmable differential instrumentation amplifier and filter with dual outputs. It installs in a 32-channel Mainframe enclosure with IEEE-488, RS-232 or Ethernet programming interface. Slave enclosures, also 32-channel, may be used to expand the system up to 512 channels.
Each amplifier has two inputs. One input is DC coupled. The other input is AC coupled and has 1 to 20 mA constant current excitation for voltage-mode charge and similar transducers. Gain is programmable from 1 to 5,000 in sixteen steps or variable with 0.05% resolution over the entire range. Bandwidth is 50 kHz for the 6125 and 100 kHz for the 6125HF for gains through 1,000. The standard filter is an 8-pole low-pass with four programmable frequencies and wideband. An optional 4-pole, low-pass filter has continuous bandwidth selection with 1 Hz resolution from 4 Hz to 1 kHz and 3 Hz resolution from 1 kHz to 10 kHz.
Voltage substitution using an external traceable standard is provided for gain calibration. Facilities are provided for automatic gain and zerocalibration by software. Each channel has two, independent ±10 Voltoutputs that can be individually selected for wideband or filtered response. The output and all programmed settings may be read by software.
The 6125 is programmed by text strings written to the interface. PI610 is a Window’s based application program for Series 6100 products It comes ready-to-run or may be used as an Application Programmers Interface for designing custom applications.
Specifications - Models 6125& 6125HF
Unless noted specifications apply to each channel individually
Voltage Calibration
Voltage substitution with selectable attenuation of 1, 0.1 and 0.01 ±0.02%.
Input Range
±2 mV to ±10 Volts full scale. Input protected to ±50 Volts.
Gain
Programmable from 1 to 5,000 with 0.05% resolution. Calibrated steps of 1, 2, 3, 5, 10 .... 5,000 with ±0.05% accuracy.
Static Accuracy
Typically ±0.02% for gains 1 to 1,000 after calibration.
Common Mode
120 dB (balanced input) or 110 dB (350 Ohms source unbalance) at gain 1,000, DC to 60 Hz. ±10 Volts, protected to ± 50 Volts.
Bandwidth
50 kHz, -3 dB. 100 kHz, -3dB for the HF version
Standard Filter
Eight-pole low-pass Bessel filter with bandwidths of 2.5 kHz, 5 kHz, 10 kHz and 20 kHz. Alternate frequencies may be installed using plug-in resistor cards.
Filter (Option PF)
Four-pole, low pass Bessel, 4 Hz to 10 kHz programmable in 1 Hz steps from 4 Hz to 1 kHz and in 3 Hz steps from 1 kHz to 10 kHz.
Sampling
Up to 100K S/s per channel. Time correlation is ±50 nS. Up to 200K S/s for the HF version.
Alarms
Four programmable alarm levels. High and low signal peak memory.
Analog Outputs
Two buffered, ±10 Volts full scale, wideband or filtered outputs on a 9-pin Type D connector. One output is also on a 3.5 mm audio jack.
Dual inputs, voltage and voltage mode charge
