⑦
SHIFT key Status LED:
To indicate the SHIFT key status. When this LED is on, the
following numerical keys will be activated as the secondary
function keys.
⑧
Units LEDs:
To indicate the units of frequency or duty cycle.
⑨
Attenuator LED:
When the -20dB LED is on, the –20dB attenuator is controlled
by the SHIFT + 8 (-20dB) keys are on.
⑩
DUTY LED:
When the DUTY LED is on, the parameter display will show the
duty cycle and wait for editing (for square wave only).
⑪
TTL/CMOS LED:
When the TTL LED is on, that means the TTL/CMOS is
enabled. (Always turn on when the MAIN output wave form is a
square wave.)
⑫
Parameter display:
The 9 digits parameter display presents the parameter values and
information, like counter frequency, duty cycle and save/recall.
⑬
MAIN Output
Main output with 50
Ω
output resistance.
7