Technical data

4-32
Hardkey and Softkey Reference
coefficient (magnitude and phase) of the device under test. This is also referred to as the modulation transfer or
response function of the device under test.
TRANS: O/E PORT 1. configures the instrument for a measurement of the electrical-to-optical complex forward
transmission coefficient (magnitude and phase) of the device under test through port 1. This is also referred to as the
demodulation transfer or response function of the device under test.
TRANS: O/E PORT 2. configures the instrument for a measurement of the electrical-to-optical complex forward
transmission coefficient (magnitude and phase) of the device under test through port 2. This is also referred to as the
demodulation transfer or response function of the device under test.
TRANS: FWD S21 (B/R). defines the measurement as S
21
, the complex forward transmission coefficient (magnitude and
phase) of the test device.
TRANS: REV S12 (A/R). defines the measurement as S
12
, the complex reverse transmission coefficient (magnitude and
phase) of the test device.
TRANSMISSION. leads to the transmission menu.
TRIGGER MENU. presents the trigger menu, which is used to select the type and number of the sweep trigger.
TRIGGER: TRIG OFF. turns off external trigger mode.
TRL 3.5 mm 85052C. selects the 85052C cal kit.
TRL*/LRM* 2-PORT. leads to the TRL*/LRM* 2-port calibration menu.
TRL/LRM OPTION. selects the TRL/LRM Option Menu, under the modify cal kit menu.
TRL LINE OR MATCH. is used to enter the standard numbers for the TRL LINE or MATCH class.
TRL THRU. is used to enter the standard numbers for the TRL THRU class.
TRL REFLECT. is used to enter the standard numbers for the TRL REFLECT class.
TTL OUT HIGH. sets the TTL output (TEST SEQ BNC) on the back of the analyzer high.
TTL OUT LOW. sets the TTL output (TEST SEQ BNC) on the back of the analyzer low.
TUNED RECEIVER. sets the analyzer to function as a tuned receiver only, disabling the source.
UNCOUPLED. allows the marker stimulus values to be controlled independently on each channel.
UPPER LIMIT. sets the upper limit value for the start of the segment. If a lower limit is specified, an upper limit must
also be defined. If no upper limit is required for a particular measurement, force the upper limit value out of range (for
example +500 dB). When UPPER LIMIT or LOWER LIMIT is pressed, all the segments in the table are displayed in
terms of upper and lower limits, even if they were defined as delta limits and middle value. If you attempt to set an
upper limit that is lower than the lower limit, or vice versa, both limits will be automatically set to the same value.
USE PASS CONTROL. lets you control the analyzer with the computer over GPIB as with the talker/listener mode, and
also allows the analyzer to become a controller in order to plot, print, or directly access an external disk. During this
peripheral operation, the host computer is free to perform other internal tasks that do not require use of the bus (the
bus is tied up by the analyzer during this time). The pass control mode requires that the external controller is
programmed to respond to a request for control and to issue a take control command. When the peripheral operation is
complete, the analyzer passes control back to the computer. Refer to the GPIB programming chapters in the
programmer's guide for more information. In general, use the talker/listener mode for programming the analyzer unless
direct peripheral access is required.
USE SENSOR A/B. selects the A or B power sensor calibration factor list for use in power meter calibration
measurements.
USER. is used to select the preset condition defined by the user.
USER KIT. is used to define kits other than those offered by Agilent Technologies.
USER SETTINGS. selects a menu of user settings, including preset settings that can be changed by the user.
VELOCITY FACTOR. enters the velocity factor used by the analyzer to calculate equivalent electrical length in
distance-to-fault measurements using the time domain option. Values entered should be less than 1. Velocity factor is
the ratio of the velocity of wave propagation in a coaxial cable to the velocity of wave propagation in free space. Most
cables have a relative velocity of about 0.66 the speed in free space. This velocity depends on the relative permittivity