Tektronix Applications Expert

Hello ,
The Declassification and Security Instruction information can be found at the following link:

https://www.tek.com/en/oscilloscope/dpo4054-manual/tektronix-4000-series-rev-b

Hello,

This unit will need to be sent in for repair. You can follow the troubleshooting tree in the Service Manual to try and figure out the issue if you want to attempt to repair it yourself, but I would suggest sending in the unit. Here is the Service Manual for your scope: https://www.tek.com/en/oscilloscope/tbs1000-digital-storage-oscilloscope-manual. If you decide to send in your scope, you can contact our Service team by emailing rmarequest@tektronix.com or calling 1-800-833-9200 option 2.

Hello ,

The TDS2024 went out of production in 2006 and has been out of support since 2011. Our service group still offers best effort repair but if the power supply is the issue I show them as no longer available.

If you like you might consider reviewing the service manual to troubleshoot.

https://www.tek.com/en/oscilloscope/tds1002-manual/tds1000-tds2000-series-service-manual

This document provides information for technicians to maintain or service a product. Information is given to the module level, and may include product care and cleaning tips, troubleshooting information, adjustments, and how to replace parts.

Stacking two 2657A's in series is not supported.

Hello,

You can change the horizontal scale to see more of your signal. To get 10 seconds of signal, you will need a horizontal scale of 1s/div. You will likely need to increase the record length to ensure you are seeing enough signal detail. You can find the record length settings in the Acquire menu.

Hello,

The slow spectrum update rate that you are seeing at low frequencies is normal for the MDO34. This is due to the MDO43 being a fourier transform based spectrum analyzer. It needs to acquire a long sample in order to resolve low frequency signals. There are two ways to improve the refresh rate, the first being increasing the RBW like you have already found. The second method would be to use an analog channel and applying an FFT to it using the math channel. You can load the attached setup file as an example.

I have been unable to recreate the issue with the peaks periodically being displayed at the wrong frequency.

I do have a couple of other notes that you may want to keep in mind when working with the spectrum analyzer on the MDO34. The first is the input power rating for the RF channel is limited to +20dBm, while 10Vpp is roughly 24dBm. Going beyond this limit may cause damage to the RF channel.
The second is that the RF channel is speced from 9kHz to 1GHz or 3GHz. You may see significant attenuation below 9kHz.
The spike that you are seeing at DC is normal for all spectrum analyzers.
Finally, there has been a firmware update since you created this case, it can be found at the following page: https://www.tek.com/en/support/software/firmware/3-series-mdo-firmware-v11215

Hello,

To enable to free 1GHz spectrum analyzer on the MDO34 please do the following. Firstly ensure that the scope is running firmware version 1.10.4. Second register your scope at the link below. Finally after you install the new license key your scope will unlock the 1GHz spectrum analyzer.

MDO3 Series Firmware 1.10.4:
https://www.tek.com/en/support/software/firmware/3-series-mdo-firmware-v1104

Registration Link:
https://www.tek.com/en/register3mdo

These files are keep on the hard drive, if the drive has a problem best to get the looked into soon.

You could warm up the DPO7254C disconnect all inputs and from the Utility menu run the Calibration (SPC).

Hi Patrick,

As as general rule of thumb, SPC should be run in the following instances:

1. Power cycled: Every time you power up the scope, after waiting the 20 minute warm up period for the scope to arrive at a steady operating temp, SPC should be run.

2. Temp change > 5 degrees C: As you saw in the manuals, an external temperature shift will lead to a slightly different internal operating temperature for the scope, and should be compensated for.

3. Every 30 days: Normally one of the previous two conditions will have been met prior to this 30 day period coming into effect, but if not then you should run SPC once a month.

The 'before critical measurement' piece is more of a safeguard for procedural testing. It can give piece of mind that the signal path will be properly compensated without needing knowledge of the instruments operating history.

Thanks for contacting us,

The part P77STCABL is $2,130 and soldering guidelines and procedures can be found in the manual here: https://www.tek.com/en/manual/low-voltage-differential-probe/p7700-series-differential-probe-low-voltage-071342105.

You can contact buy@tektronix.com when you are ready to order.