Technical data

4-31
Hardkey and Softkey Reference
connects between the analyzer output and input ports.
THRUS. starts the measurement of calibration standards used for transmission measurements. There is one cable that
directly connects between the analyzer electrical output and input ports (PORT 1 and PORT 2). There is also one cable
that directly connects between the analyzer optical output and input ports (OPTICAL OUTPUT and OPTICAL
RECEIVER).
THRU/RCVR. starts the frequency response calibration of the instrument when in the E/O mode. RCVR stands for
receiver, and implies that the instrument will use the internally stored calibration data for the internal optical receiver.
Use this type of calibration when the DUT can be connected directly to the optical receiver input port, or when the loss
and delay of an optical cable are of no concern. For more information, refer to chapter 4 of the user’s guide.
THRU/SRC. starts the frequency response calibration of the instrument when in the O/E (port 2) mode. SRC stands for
source, and implies that the internally stored calibration data for the optical source and modulator will be used to
compute the calibration coefficients. Use this type of calibration when the DUT can be connected directly to the
OPTICAL OUTPUT, or when the loss and delay of an optical cable are of no concern. For more information, refer to
chapter 4 of the user’s guide.
THRU THRU. measures all four S-parameters in a TRL/LRM calibration.
TIME STAMP on OFF. turns the time stamp function on or off.
TINT. adjusts the continuum of hues on the color wheel of the chosen attribute. Refer to the section on adjusting the
display color in the “Making Measurements” chapter of the user’s guide for an explanation of using this softkey for color
modification of display attributes.
TITLE. presents the title menu in the softkey labels area and the character set in the active entry area. These are used
to label the active channel display. A title more menu allows up to four values to be included in the printed title active
entry, active marker amplitude, limit test results, and loop counter value.
TITLE SEQUENCE. allows the operator to rename any sequence with an eight character title. All titles entered from the
front panel must begin with a letter, and may only contain letters and numbers. A procedure for changing the title of a
sequence is provided at the beginning of this chapter.
TITLE TO MEMORY. moves the title string data obtained with the P MTR/GPIB TO TITLE command into a data array.
TITLE TO MEMORY strips off leading characters that are not numeric, reads the numeric value, and then discards
everything else. The number is converted into analyzer internal format, and is placed into the real portion of the
memory trace at: Display point = total points − 1 − loop counter. If the value of the loop counter is zero, then the title
number goes in the last point of memory. If the loop counter is greater than or equal to the current number of
measurement points, the number is placed in the first point of memory. A data to memory command must be executed
before using the title to memory command.
TITLE TO P MTR/GPIB. outputs a title string to any device with an GPIB address that matches the address set with the
analyzer Local, SET ADDRESSES, ADDRESS: P MTR/GPIB commands. This softkey is generally used for two
purposes: sending a title to a printer when a CR-LF is not desired and sending commands to an GPIB device.
TITLE TO PERIPHERAL. outputs a title string to any device with an GPIB address that matches the address set with the
analyzer Seq, SPECIAL FUNCTIONS, PERIPHERAL GPIB ADDR commands. This softkey is generally used for two
purposes: sending a title to a printer when a CR-LF is not desired and sending commands to an GPIB device.
TITLE TO PRNTR/GPIB. outputs a title string to any device with an GPIB address that matches the address set with the
analyzer Local, SET ADDRESSES, ADDRESS: PRINTER commands. This softkey is generally used for two
purposes: sending a title to a printer for data logging or documentation purposes and sending commands to a printer or
other GPIB device.
TRACKING on OFF. is used in conjunction with other search features to track the search with each new sweep. Turning
tracking on makes the analyzer search every new trace for the specified target value and put the active marker on that
point. If bandwidth search is on, tracking searches every new trace for the specified bandwidth, and repositions the
dedicated bandwidth markers.
When tracking is off, the target is found on the current sweep and remains at the same stimulus value regardless of
changes in trace response value with subsequent sweeps. A maximum and a minimum point can be tracked
simultaneously using two channels and uncoupled markers.
TRANS: O/O. configures the instrument for a measurement of the optical complex forward transmission coefficient
(magnitude and phase) of the device under test.
TRANS: E/O. configures the instrument for a measurement of the electrical-to-optical complex forward transmission