The command sets a 3739 Test Set ALC calibration frequency/power table entry for the given channel. The query outputs a 3739 Test Set ALC calibration frequency/power table entry for the given channel. This calibration is performed over the operating frequency range of a Millimeter-Wave (mm-Wave) Test Set. See the types available from VDI or OML. The frequency values are constrained by the frequency range of the Test Set.
Best practices recommend that users know the power lever range of their Test Set and module as there will be no error thrown if the power level is set too high or too low. The power specifications of the mm-Wave modules should be well known, and it would be prudent if the user specified power levels in the range of the mm-Wave module he is using. One should also notice that the menu for this specifies that the power entered should be the maximum power for that module.
Note that when the VNA is is mm-Wave mode, pressing the front panel Preset (Reset) button takes VNA operation back to its regular mode with no mm-Wave operation and thus default values for this command do not exist.
The command selects the 3739 Test Set ALC calibration leveling type for the given channel. The query outputs the 3739 Test Set ALC calibration leveling type for the given channel. The leveling types available are:
• IFLEVeling = For Modular BB, IF leveling provides the advantages of RF leveling described below plus the benefit of greater power control range and a lower minimum leveled power (at least 20 dB lower typically). As one approaches a 100 MHz difference between source and receiver frequencies, the power control range will start to decrease as will power control accuracy. The use of IF leveling is not recommended for source-receiver frequency differences greater than 100 MHz.
• RFLEVeling = For Modular BB, RF leveling provides a leveled RF output power with improved source match, protection against over powering the DUT, and insuring that the DUT is operating in its designated power range.
• VNALEVeling = Selecting VNALEVeling turns the RF or IF ALC off and the ALC accuracy is as it for the standalone VNA instrument.
Cmd Parameters
<char1> IFLEVeling | RFLEVeling | VNALEVeling
Query Parameters
NA
Query Output
<char1> IFLEV | RFLEV | VNALEV
Range
NA
Default Value
VNALEVeling
Syntax Example
:SOUR1:TS3739:ALCC:LEV RFLEV
:SOUR1:TS3739:ALCC:LEV?
:SOURce{1-16}:TS3739:ALCCal:POINt?
Description
Query only. Outputs the 3739 Test Set ALC calibration number of frequency/power points in the calibration. If setting up this calibration manually from the front panel, the number of points is set first and the user enters all the frequency,power values afterwards. The GPIB is the exact reverse. The user enters frequency, power pairs until they are satisfied or the maximum number of pairs reaches the limit of 25.
Query only. Performs a 3739 Test Set flat power correction calibration for the indicated channel and port and returns calibration status information, where: