EarthData PR6-24 Recorder, 45 units
45 Units                                      3 Channels (all Units with USB connector)

Hard Disk, 150 units
25 Units                                         30.0 GByte
125 Units                                       40.0 GByte

Parameters - Input Signal
Channels                                        3 , plus 4 auxiliary used for seismometer mass position
Preamplification                         0.4; 1; 10
Clipping                                          Signal Channels: 40 Vpp @ PreAmp = 0.4 Auxiliary Channels: 20 Vpp

Digital Signal
Sampling Rate                              1; 2; 4; 5; 10; 20; 25; 40; 50; 75; 100, 120; 125; 150; 200; 250; 300; 375; 500; 600;
                                                            750; 1000 sps; 3000 sps (reduced dynamic range);
Resolution                                      MiniSEED, ASCII: 2.5 microVolt/digit ( @ PreAmp = 0.4 ) digitiser output: 3.9
                                                            nanoVolt/digit
Dynamic Range                            140 dB @ 100 sps
                                                            145 dB @ 25 sps (4 Byte digitiser output 150 dB) 
                                                            96 dB @ 3000 sps (upper 2 Bytes only)

Time Keeping
Clock                                                  1*10e-6 (TCXO)
Synchronisation                            GPS, continuously or cycled

Digitiser Buffer
RAM (volatile)                                16 MByte
Format                                              4 Byte

Data Storage
Hard Disk                                          30.0 GByte (Data Partition 27.3 GByte,FAT 32)
                                                              40.0 GByte (Data Partition 36.6 GByte, FAT 32)
Storage Format                              ASCII, upper 3 Bytes of digitiser output MiniSEED, compressed (Steim-1),
                                                              based on upper 3 Bytes 'legacy', PR2400 multiplex (equivalent to digitiser
                                                              output)

Physical Parameter
Power Consumption                      < 1.8 Watts (GPS cycled) to 2 Watts (GPS conti) @ 3*100 sps
Weight                                                  Recorder, including disk: 4.3 kg (new series 3.75 kg)
Operating Temperatures              Recorder and Disk: -20 to +65 °C

Connectors (Front Panel, Hard Disk)
Power Consumption