Data Sheet and User Manual
Contents
1. Data 7 0 D1 7 0 Data 15 8 DOdnh Low Byte Inhibit D1 dinh High Byte Inhibit 4 0 Electrical specification for the P373 probe All specifications assume 100 ohm differential load unless otherwise noted All specifications are at 25 degrees Celsius ambient temperature 30 minutes for stabilization of both the PG and the probe Characteristic Specification Notes Output Risetime 210pS typ Output Enable time 300nS max Yes three hundred nS Output Disable time 12nS max Skew nybble 65pS 4 consecutive bits starting with DO Skew worst case probe 550pS Any bit in any probe to any probe other bit in any other probe Clock before data 50ps 400pS typical Within one probe all bits Output Characteristic Min Max Vod differential voltage 250mV 500mV 600mV Vcm common mode 1 05 V 1 18 V 1 475 V Weight 150 grams approximate Overall Dimensions Length 130mm Width 80mm approximate Height 29mm 5 0 Backside Test Connector Pinout The P373 features a Tektronix P6980 connection from the backside to facilitate connection to a logic analyzer during pattern debug and perhaps even during system test Pinout Al DOp Bl Ground A2 DOn B2 Di_n A3 Ground B3 Dl_p A4 D2 p B4 Ground A5 D2_n B5 D3_n A6 Ground B6 D3_p A7 D4 p B7 Ground A8 D4n B8 D5_n A9 Ground B9 D5 p A10 D6_p B10 Ground All D6_n Bll D7_n A12 Ground B12 D7_2. P373 Data Sheet and User Manual PG3A Pattern Generator LVDS probe P373 November 2008 Rev 1 2 1 0 General The P373 probe features 16 LVDS outputs running at up to 300 MHz as well as a clock and a strobe To preserve the signal integrity associated with the very fast risetimes 210pS of the output drivers we have chosen to make the connection from the probe to the user system via a AMP Mictor connector and a high speed multi coax ribbon cable The probe expects the user system to be differentially terminated in a purely resistive 100 ohms All specifications assume this resistive termination The two inhibit inputs are TTL levels There is an independent inhibit for each data byte The probe data byte outputs are enabled when these are no connect or pulled low The probe does not drive the data byte outputs when the inhibit pin is driven high 2 0 Requirements The P373 probe works with all current PG3AMod and PG3ACab models The instrument firmware must be V1 0 or higher The PGApp software must be V2 0 006 or higher Updated versions of the instrument firmware and the PGApp software can be freely downloaded from the PG3A website www movingpixel com PG3A html 3 0 P373 Pinouts The pinout for the Mictor connector is as follows We use the AMP numbering convention as opposed to the Tektronix numbering convention found in some Tektronix documentation Pin 1 Low Byte Inhibit input Pin 2 Strobe_p Pin 3 Low Byte In
3. hibit input Pin 4 Strobe_n Pin 5 Clock_p Pin 6 Clock_n Pin 7 Dl_p Pin 8 DO_p Pin 9 Di_n Pin 10 DO_n Pin 11 D3_p Pin 12 D2_p Pin 13 D3_n Pin 14 D2_n Pin 15 D5_p Pin 16 D4_p Pin 17 D5_n Pin 18 D4_n Pin 19 D7_p Pin 20 D6_p Pin 21 D7_n Pin 22 D6_n Pin 23 D9_p Pin 24 D8_p Pin 25 D9_n Pin 26 D8_n Pin 27 D11_p Pin 28 D10_p Pin 29 D11_n Pin 30 D10_n Pin 31 D13_p Pin 32 D12_p Pin 33 D13_n Pin 34 D12_n Pin 35 D15_p Pin 36 D14_p Pin 37 D15_n Pin 38 D14_n The two inhibit inputs are TTL levels There is an independent inhibit for each data byte The probe data byte outputs are enabled when these are no connect or pulled low The probe does not drive the data byte outputs when the inhibit pin is driven high The probe expects the user system to be differentially terminated in a purely resistive 100 ohms All specifications assume this resistive termination 3 1 Channel Associations The labeling in the PG control application PGApp or PGAppDotNet associated with a particular output connector on the PG correspond to the above listed pin names as follows Group A AO 7 0 lt gt Data 7 0 Al 7 0 Data 15 8 AO Inh lt Low Byte Inhibit Al inh High Byte Inhibit Group C CO 7 0 Data 7 0 C1 7 0 amp Data 15 8 CO Inh Low Byte Inhibit Cl dnh High Byte Inhibit Group B BO 7 0 gt Data 7 0 B1 7 0 gt Data 15 8 BO Unh Low Byte Inhibit Bl Inh High Byte Inhibit Group D DO 7 0
4. p A13 No Connect B13 Ground A14 No Connect B14 Clock_n A15 Ground B15 Clock_p A16 D8_p B16 Ground A17 D8_n B17 D9_n A18 Ground B18 D9 _ p A19 D10_p B19 Ground A20 D10_n B20 Dil_n A21 Ground B21 DIl_p A22 D12_p B22 Ground A23 D12_n B23 D13_n A24 Ground B24 D13_p A25 D14_p B25 Ground A26 D14_n B26 D15_n A27 Ground B27 DI15_p 6 0_Pre emphasis The P373 probe has the ability to add pre emphasis to the output signals There are three jumpers accessible from the bottom of the probe that allow you to select pre emphasis Pre emphasis is useful if you are driving long lossy wires greater than a couple of feet Jumper J5 pre emphasis control for Clock and Strobe ON is toward the J5 silkscreen Jumper J3 Jumper J2 pre emphasis controls for the data Both off away from the J3 J2 reference designator silkscreen is pre emphasis off Binary selection for more pre emphasis low medium and high J2 is the most significant bit Figure 1 P373 Pre emphasis Jumpers 7 0 Other useful information Part number for a connector that will mate with the probe output cable Amp 767054 1 Part number of the probe output cable Tyco Precision Interconnect 91385003801ISAA21 The LVDS driver we use inside the probe is the National Semiconductor DS90L V004 Data on this device can be found at http cache national com ds DS DS90LV004 pdf If a user system does not need to run at the highest speeds the probe suppo
5. rts and does not want to connect to the user system via a Mictor there are adapters available for Mictor to square pins like the Nexus Technology Nex HD20 http www nexustechnology com products laAccessories hd20 Using an adapter from the Mictor will like cause signal integrity to suffer as the risetime on the output of the probe is typically 210 pS Uncontrolled impedances of longer than 5mm will be noticed in the waveform Uncontrolled impedances of longer than 3 cm may make the signal unusable especially the clock signal Also note that all the probes except the P300 can be stacked on top of each other Metal inserts are provided in each side of the probe for assisting in probe mounting The screw thread is a UNC 4 40 Any screw thread inserted into this should not exceed 0 25 inches in length else the probe could be damaged
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