| Products > Test Equipment |
| Reverse engineering Tektronix TDS3GV module for TDS3000 series oscilloscopes? |
| << < (20/21) > >> |
| coromonadalix:
@Jacquesbbb it is not for the same scope series |
| JacquesBBB:
I know well that TDS220 is not the same series as TDS3000 but the functions of the interface are the same, so maybe part of them can be retrieved from the TDS2CM module. At least the serial interface. I wonder if the GPIB from the TDS2CM could be used for a TDS3000. |
| JacquesBBB:
I got the 100 pins connector. soldered 5 wires 67 : GND 68 :TxD 69 : RxD 70 :RTS 71 :CTS Connected a serial to USB dongle based on a RS232 FTDI chip using 3.3V option Use a serial terminal emulator on my mac ( Coolterm) set the communication on the TDS3032 ( with ENG dongle) version 3.39 with all options. Baud rate : 9600 flagging : none EOL : CR/LF set the comm on coolterm Baudrate : 9600 Data bits : 8 parity : none stop bits : 1 CTS on I have made a test by printing through the serial port. I properly received a postcript file on the terminal. Nevertheless, I have no answer when I send : *IDN? What am I missing ? Thanks for all |
| sicco:
Two things to check: 1. Signals are TTL logic levels, not RS232. So high (3V3) when idle, low when active. 2. Pin numbering on the 100 pins connector: the counting for pcb edge connector is different from the counting used on the original Molex part. |
| sicco:
And note that this serial port only gets active after plugin module detection. Each tds3xx plugin has an 8 bit ID that is sensed during bootup. Typically using a 74xx245 IC, that pushes the ID on the databus when a CE line is driven low. See posts higher up. If after a boot the scope does not say that it has a serial module plugged in, then it will ignore the Rx,Tx pins that you used. |
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