When ever the limit units are ac tive, limit check ing is ap plied as
fol lows: If the chan nel value is greater than the high limit, and
the high limit is turned ON, a FAIL is in di cated. If the chan nel
value is be low the low limit, and the low limit is ON, a FAIL is in -
di cated. Oth er wise, if any limit is ON and a FAIL is not de tected,
PASS is in di cated.
HIGH Limit
[HLIM]
Sets the high limit. It is not nec es sary to en ter the units as the
limit value is checked against the dis played value. There fore, if
the lim its have been set for –10 dBm and the dis play units are
sub se quently changed from dBm to Watts, the sys tem still checks
for the read ing to rise above –10, even though the dis play units
type has been changed. En ter a value from:
Set ting a limit value auto mati cally turns on the limit state, ex -
cept when done via GPIB.
LOW Limit
[LLIM]
Sets the low limit. It is not nec es sary to en ter the units as the
limit value is checked against the dis played value.
HIGH State
[HLIMS]
Se lect ON or OFF to en able or dis able high limit check ing.
LOW State
[LLIMS]
Se lect ON or OFF to en able or dis able low limit check ing.
FAIL HOLD
[FHOLD]
If FAIL HOLD is ON, both the screen FAIL in di ca tor and the
BNC out put are held in the fail state when ever the lim its speci -
fied for the chan nel have been ex ceeded, re gard less of whether
the read ing sub se quently goes into pass or not. This state re -
mains un til FAIL HOLD is turned OFF.
BEEP
[FBEEP]
If BEEP is ON, and FAIL HOLD is OFF, when ever the lim its
speci fied for the chan nel have been ex ceeded, a sin gle beep
sounds.
If fail BEEP is ON and FAIL HOLD is ON, when ever the lim its
speci fied for the chan nel have been ex ceeded, a beep will sound
once every sec ond un til FAIL HOLD is turned OFF, or the
CLEAR key ( CLR ) is pressed.
The FAIL in di ca tion is not af fected by the CLEAR key, and can
only be cleared by turn ing FAIL HOLD off. If a limit fail hap pens
again, the alarm will sound again.
ML2400A OM 4-15
OPERATION CHANNEL MENU
NOTE
In Pro file mode, the
limit value is only
checked against dB
val ues as Pro file mode
only works in dB.
Units Min Max
dBm –99.99 +99.99
dBmV –53.00 147.00
dB
mV 7.00 207.00
Watts 0.0 50.0
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