HP 8530A, Operating And Programming Manual, Page: 417 / 439

Glossary
If you are displaying a single parameter , each external trigger will measure the A UT at
one angle , then advance to the next angle and wait for another trigger .
If you are displaying four parameters , each trigger will measure all four parameters at
one angle , then advance to the next angle and wait for another trigger .
The Trigger Mode feature of the HP 8530A (under STIMULUS 4 MENU 5
NNNNNNNNNNNNNN
MORE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRIGGER MODE )
provides more exibility . Y ou can make the receiver wait for a trigger before measuring
any specic parameter . Y ou could measure one parameter per trigger , measure two
parameters per trigger , or any combination. The only limitation is that you must measure
the parameters in numeric sequence (1, 2, 3, 4). Y ou can also make the receiver wait for a
trigger before advancing to the next angle .
Internal Triggering:
If a single parameter is displayed, the receiver measures the A UT at one angle , advances to
the next angle , and measures it. This continues automatically until the whole pattern is
measured.
If you are displaying four parameters , each trigger will measure all four parameters at
one angle , then advance to the next angle and measure all four parameters again. This
continues automatically until the whole pattern is measured.
More information on how the various sweep modes work is provided in the Keyword
Dictionary , under the title of each mode .
Memory Data
An internal data array . V alid data can be read from this array (over HP-IB) if data has been
stored to one of the memory registers . V arious trace math functions are possible when using
the memory data feature .
P arameter
The input, or input ratio , that you have selected for the measurement. The front panel
keys 4 P ARAM 1 5 , 4 P ARAM 2 5 , 4 P ARAM 3 5 , and 4 P ARAM 4 5 are set at the factory to select dierent
input ratios (b1/a1, b2/a1, and so on). F or example , 4
P ARAM 1
5 divides (ratios) input b1 by a1.
Y ou can redene the P ARAM keys so they ratio any two inputs you desire . Y ou can also
congure any P ARAM key to measure a single input.
Ramp Sweep Mode
Ramp Sweep mode is a non phase-locked sweep in which the receiver tracks the continuous
frequency sweep of the RF source . In Ramp Sweep mode , a \measurement" is a complete
frequency sweep spanning the start and stop frequencies . T o select this mode , make sure
the receiver is in Frequency or Time Domain and press:
STIMULUS 4 MENU 5
NNNNNNNNNNNNNN
RAMP
Only one sweep must be measured if averaging is OFF . If averaging is ON, n + 1 sweeps
must be measured, where n is the selected averaging factor .
F or example , assume you select four parameters , ramp mode , and averaging is set to 4. T o
take a fully averaged measurement:
If using Continual mode , allow ve sweeps to complete . After ve sweeps the data is
fully averaged.
If controlling the receiver by computer , set Number of Groups (NUMG ) to 5.
When the measurement starts , the receiver starts measuring 5 complete sweeps of
parameter 1. When it nishes , it starts taking 5 complete sweeps of parameter 2. This
continues until all four parameters have been measured.
Glossary-6