Rear Panel - Hameg Instruments HM8123 Manual De Instrucciones

nd
2 Setting the trigger level with the numerical keys
the entered value will be accepted with the unit millivolts
(mV).
ARMED / MHz (pushbutton)
Button with two functions:
st
1 Pressing this button will select the ARMED mode.
nd
2 Setting the gate time with the numerical keys
entered value will be accepted with the unit milliseconds
(ms).
OFFSET / Hz/ns (pushbutton)
Pressing this button will activate the OFFSET function.
GATED / kHz/us (pushbutton)
Pressing this button will activate the GATED mode.
Function pushbuttons to
These buttons have two functions:
st
1 The measurements function are called by operating these
buttons. The corresponding button will light up.
nd
2 Setting the trigger level or the gate time, the desired
value can be entered with this buttons and the unit buttons
(mV , V and ms , s ). Also refer to chap. Gate time
and Triggering. None of these button is lit.
FREQ A Frequency channel A
FREQ B Frequency channel B
FREQ C Frequency measurement channel C
PER A Period channel A
Width A Pulse width channel A
A : B Frequency ratio of channels A : B
Duty A Duty cycle channel A
TI A B Time interval A B
TI avg A B Time interval A B averaged
, Phase A B Phase difference A B
RPM A
TOTAL A
TRIG/ARM INPUT (BNC connector)
External gate control input
, the

Rear Panel

Interface
RS-232 interface (Options: IEEE-488, USB)
A (BNC connector)
Trigger signal channel A output (e.g. for display on a scope).
Signal level 0 to + 5 V (TTL level)
B (BNC connector)
Trigger signal channel B output (e.g. for display on a scope).
Signal level 0 to + 5 V (TTL level)
GATE (BNC connector)
Gate view output. This output will be high as long as the gate
is open during a measurement.
10 MHz Ref. (BNC connector)
External reference input (10 MHz)
RESET (BNC connector)
External reset signal input (TTL level). The function is iden-
tical to that of the RESET pushbutton
Mains input connector
C o n t r o l s a n d d i s p l a y
Rpm measurement channel A
Event counting channel A
.
Subject to change without notice
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