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RX7 Tech Notes

RX7 Stimulator no longer works after updating MS16 macro

TN0869

Product: RX7
Version: All
Date Added: 2010-02-22

Issue

Version 70 of RPvdsEx includes an updated MS16_Control macro that supports the RZ5. If you open a circuit file containing an earlier version of the macro, you'll be prompted to update your macros. After updating the MS16_Control macro, the target device will be set to the RZ5, by default. If you don't reset the device to the RX7, the microstimulator will not work correctly the next time the circuit is run.

Solution

After updating the macros in the circuit open the MS16_Control macro properties and change the Processor to RX7.

Stimulator control bits and relay switching bits not working after power up

TN0220

Product: RX7, MS4, MS16
Version: TBD
Date Added: 2006-09-22

Issue

After power up, the stimulus isolator control bits and relay switching control bits do not work.

Workaround

To restore full functionality, execute a hardware reset on the RX7 using zBusMon.

zBusMon is available on your desktop or on the Start/TDTSys3 menu.

'Bad XM-Data read' error message displayed when performing a Transfer Test in zBUSmon with an RX7 with version 59 microcode

TN0201

Product: TDT Drivers, RX7
Version: 59
Date Added: 2005-11-07

Issue

When performing a Transfer Test in zBUSmon with an RX7 with version 59 microcode, a 'Bad XM-data read' error message is displayed.

Workaround

Use version 58 microcode with the RX7. If you have already loaded version 59 drivers and programmed your RX7, contact TDT for a version 58 microcode replacement file.

Anomalous signal on an analog output of an RX device when the channel is not in use

TN0198

Product: RX5, RX6, RX7, RX8
Version: All
Date Added: 2005-10-06

Issue

The DAC outputs of the RXn processors will continue to generate a signal under the following conditions:

  • Input to the DAC channel is greater than zero immediately before switching the DacOut channel parameter.

  • Input to the DAC channel is greater than zero immediately before halting the processing chain.

  • Input to the DAC channel is greater than zero immediately before loading a new processing chain.

Workaround

Make sure that the inputs to all DAC channels are zero before doing any of the above. This can be done by gating the signal or setting the DAC output to zero before switching channels, halting the processing chain, or loading a new chain.

Note

The anomalous signal can be terminated by cycling power on the zBus rack holding the RXn processor.

Data not stored for amplifier channels 11-14

TN0186

Product: RX7
Version: Serial Numbers < 4000
Date Added: 2005-06-08

Issue

RX7 devices with serial numbers less than 4000 might not acquire and store signal input from channels 11-14 on Amp-A.

Solution

Contact TDT to request a chip upgrade.

Using non TDT amplifiers

TN0140

Product: RA16BA, RX5, RX6, RX7, RZ2, RZ5
Version: All
Date Added: 2004-09-23

Issue

TDT modules that connect to amplifiers are compatible with any amplifier (including those not sold by TDT). Any TDT module with analog or fiber optic inputs can acquire signals of ± 10 V.