HP 3562A Operating Manual page 119

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SETTING UP THE SWEPT SINE RECEIVER
Press A GAIN ON OFF to ON to display the A GAIN SELECT softkey. Pressing A GAIN
SELECT displays the following menu:
The Reference Channel When auto gain is active, the H P 3562A adjusts the level of the
swept sine source output to maintain the specified reference level (entered with REF LEVEL).
8y selecting Channel 1 as the reference, a constant input signal level can be maintained to the
system under test. 8y selecting Channel 2 as the reference, a constant signal level can be
maintained at the output of the system under test. The reference level can be set from 5 mV
t0 31.5 Vpk.
Limiting the Source Output
maintain the reference level, it is sometimes necessary to place a limit on the source level.
This may be needed to limit input levels (to prevent damage to the system under test) or out·
put levels (to prevent distortion caused by overloading the H P 3562A's inputs). The source
can be limited from 5 mV to 5V; the default value is 5 mV. (The source leve) changes in 5 mV
increments.)
3-4
..... "' .... .
REF
Selects Channel
CHAN 1
Reference Channer' following this menu.
REF
Selects Channel 2 as the reference channel: see "The
CHAN 2
Reference Channel" following this menu.
REF
Used to enter the reference level for the reference chan­
LEVEL
nel; see "The Reference Channel" following this menu.
SOURCE
Used to enter the source limit value; see " Limiting Ihe
LIMIT
Source Output" following this menu.
RETURN
Redisplays the
8ecause auto gain can adjust the source output level to
1 as the reference channel: see "The
menu.
MEAS MODE