Section 4 Operation
4-4
4.1.1 Turning on the Power
Perform the power-on procedure through warming up the internal reference oscillator
to normal MT8801C operation in order of the following steps:
Step Operation Result check
1. • When using a three-pole power cable with a grounding ter-
minal, the MT8801C need not be grounded.
2.
O I
• When the button is pressed down and set, it is I (On). Press
the button again to release it. When the button is set Off, the
AC power is turned off even if the power switch on the front
panel is set On.
3. • Fully insert the power cable jack so that there is a gap of 1 to
2 mm as shown in the figure below.
4.
5. • The Stby lamp on the front panel power switch lights.
• The reference crystal oscillator circuit built in the
MT8801C starts to warmed up. Before operating
the MT8801C under low temperatures, warm up
the crystal oscillator for 24 hours. The table be-
low lists the stability of the crystal oscillator
based on the warm-up time.
Crystal oscillator stability
Item Stability
Starting
characteristics
After 30-minute
operation
5 × 10
-8
/day or less
Aging rate
(after 24-hour operation)
Stability at ambient
temperature change of crystal
oscillator (25˚C ±25˚C)
2 × 10
-8
/day or less
±5 × 10
-8
or less
6.
Stby
On
• The On lamp on the front panel power switch
lights and the Stby lamp goes off.
• Power is supplied to all circuits in the
MT8801C, then the MT8801C becomes op-
erable.
Set the O I switch on the
rear panel to O (Off).
Connect the power cable jack to the
AC power inlet on the rear panel.
Connect the power cable plug to the
AC power outlet.
Connect the frame grounding terminal
on the rear panel to ground.
Set the O I switch on the rear panel to
I (On)
Hold down the Stby/On
switch on the front panel
for a few seconds to set it
On.
Stby
On
Stby
On
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