Atec Agilent-8753E - Manual (Page 12)

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HP 8753E supplemental characteristics, cont’d
1. +8 dBm with Option 075.
Sweep time
Set sweep time in seconds, minutes or hours. Minimum
sweep time is dependent on number of data points per
sweep and selected IF bandwidth.
Automatic sweep time
Select auto sweep time by entering zero seconds sweep
time. The analyzer will sweep at the minimum sweep time
for any subsequently selected stimulus conditions. Auto
sweep time is the default condition.
Sweep trigger
Set to either continuous, hold, single, group sweep, or
external trigger. Set external trigger to take a complete
sweep or to measure individual points in a frequency,
power or list sweep.
Power
Set source power (–85 to +10 dBm)
1 for HP 8753E. Power
slope can be set in dBm/GHz. Control the test port signal
by setting the internal attenuator of the test set over a
70-dB range. Power trip automatically reduces source
power to its minimum value when excessive signal levels
are incident on the receiver test-port. A caution message
is also displayed. (Source power range differs depending
on the selected options. Refer to the “Test-Port Output
Characteristics” section for the appropriate instrument
for more information.)
Power meter calibration
Description
Use a power meter to set leveled input or output power at
the device under test at a single point or an entire sweep.
With an HP 436A, 437B, 438A, or 441A power meter
connected, the Cal Sweep measures the actual test-port
power. After the calibration is enabled, the internal RF
source power is adjusted (within the range of –85 to +10
dBm) to achieve the selected power at the input of the
device under test rather than at the test port output.
HP-IB control of the power meter for normalization or
leveling is built-in. Logarithmic, linear, CW, and list
sweeps can be calibrated.
Update calibration
Select continuous leveling (requires a power splitter) by
measuring and updating source power on each sweep or
use a correction table (to modify source power), which is
created with an initial single sweep.
Number of readings
Make single or multiple power meter readings at each
frequency.
Data accuracy enhancement
Measurement calibration
Measurement calibration is the process through which
measurement uncertainty due to errors caused by system
directivity, source and load match, tracking, and crosstalk
are significantly reduced. A wide range of calibrations are
available for the HP 8753E. Full two-port calibration
removes all the systematic errors to obtain the most
accurate measurements.
Calibration types available
• Frequency response
Simultaneous magnitude and phase correction of
frequency response errors for either reflection or trans-
mission measurements. Requires a short or open circuit
termination (reflection) or a through connection
(transmission).
• Response and isolation
Compensates for frequency response and directivity
(reflection) or frequency response and crosstalk errors.
Requires an open, short, and load circuit termination
(reflection) and a through connection and load termina-
tion (transmission).
• One-port calibration
Uses test set port 1 or port 2 to correct for directivity, fre-
quency response and source match errors. Requires open,
short, and load.
• Two-port calibration
Compensates for directivity, source match, reflection
frequency response, load match, transmission frequency
response and crosstalk for an S-parameter test set.
Crosstalk calibration can be eliminated. Requires open,
short, and load terminations for both ports plus a through
connection.
• TRL*/LRM* calibration
Compensates for directivity, reflection and transmission
frequency response, and crosstalk in both the forward
and reverse directions. Especially suitable for calibrating
non-coaxial environments, such as in test fixtures.
Requires through, reflect, and line or match standards.
TRL*/LRM* is a special implementation of TRL/LRM
calibration, modified for the three-sampler receiver in
the HP 8753E.
• One-port, two-path calibration
A two-port cal for the one-port reflection/transmission test
sets. Provides a full two-port error corrected measurement
when the device under test is turned around and measured
in both directions.