VPAC-1000F user\'s guide.pdf - VIGO System SA

2.3. Preamplifier supply voltageVPAC-1000F module requires + 12 V / - 5 V / 100 mA for supply.The module is internally protected against reversing the supply polarity and abnormal voltage increase. Althoughmodule contains voltage regulators, while powering with the custom made power supply, provide the properlystabilized and filtered voltage.2.4. Preamplifier load resistanceLoad resistance of the VPAC-100F module must be exactly 50 Ω.Terminating with incorrect load resistance would lead to:• voltage response that will not match the value given in the datasheet,• preamplifier pulse response distortion to the line reflection.2.5. Thermoelectric cooler parametersCooler type Maximum voltage [V] Maximum current [A]2-TE (two stage cooler) 1.3 1.23-TE (three stage cooler) 3.6 0.454-TE (four stage cooler) 8.3 0.5Shown above parameters matters in case of using VPAC-1000F module in custom made systems. TECparameters may be changed without notification.2.6. ThermistorThermistor (with the output pins available as TH1 and TH2) is the NTC component (negative temperaturecoefficient) and it is necessary to lock the temperature control loop-back for keeping the inside temperature constant.The resistance value, when the nominal detector temperature is achieved, is given in the datasheet.129/133 Poznanska St., 05-850 Ozarow Mazowiecki, Poland; tel. +48 22 733 54 20; fax +48 22 733 54 26; e-mail: info@vigo.com.pl 6Please note: the information contained in this document is subject to change without further notification. VIGO System reserves the right to alter the performance and any resulting specifications.VS- 11-08-10MB