6Backdating
264 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Procedure Changes
Information concerning Option 106 “Microwave Input”, FW Rev (27.0)
If your counter has Firmware version 01.04 - xx.xx - xx.xx - xx.xx, or 01.05 - xx.xx -
xx.xx - xx.xx, and you have an Option 106 “Microwave Input” channel with
FW Rev (27.0) installed, then use the “Microwave Channel Frequency Calibration”
procedure shown below for your counter.
Option 106 microwave channel frequency calibration
The following procedure should be performed when Option 106 (6 GHz) with FW
Rev (27.0) is installed as Channel 2 in a 53210A or Channel 3 in a 53220A or
53230A. (Refer to “To determine the counter firmware version” on page 170.)
1 First, run the counter self-test as described under Performing the counter
self-test in the Chapter 2, "Troubleshooting the Counter" section.
A successful self-test procedure verifies that the counter is operational and
ready for calibration.
2 Unlock the counter by performing the procedure “To unlock the counter for
calibration:” on page 116.
– Key sequence:
[Utility] / (Cal AutoCal) / enter <code> / (Unlock Cal)
3 Set up an external microwave frequency source such as the Keysight
E8257D-520 for a 500 MHz sine wave at -27.0 dBm.
4 If the source has an ‘output enable’ feature, turn it ON.
5 Connect the microwave frequency source to Channel 3 on the counter front
panel. (See Figure 6-2.)
This will be channel 2 on a 53210A Counter.
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