10
(E)
BS77
3-4. Signal Adjustment
3-4-1. Signal Adjustment Preparations
Connect the detector (BD series) to the BS77 scale unit.
1
Remove the protective cap from the head connector of the scale unit, and connect the head connector to
the HEAD IN terminal of the detector.
n
.
Do not touch the connector pins with your hands as this might damage the inner electronic parts by static electricity.
When the connector is not used, such as during transport, be sure to mount the protective cap.
.
Be sure to switch off the power supply to the detector before attaching or removing the connector.
2
Connect the CH1 probe of the oscilloscope to S (SIN) and G (GND) of the signal adjustment section of
the detector.
3
Connect the CH2 probe of the oscilloscope to C (COS) and G (GND) of the signal adjustment section of
the detector.
4
Set the input coupling switches of CH1 and CH2 of the oscilloscope to GND and adjust the oscilloscope
to locate the signal in the center of the screen.
5
Set the input coupling switches of CH1 and CH2 of the oscilloscope to DC.
6
Set the TIME/DIV switch to the X-Y mode.
7
Set the deviation sensitivity (VOLTS/DIV) of CH1 and CH2 to 0.5 V/DIV.
8
Turn the detector’s power on.
Connecting the BS77 and a BD series detector unit
LASER SCALE
RESET
REF
LALM
SALM
H E A D I N
C H E C K
S I G O U T
S
C
G
S
C
G
CH1
CH2
CH1
CH2
HEAD IN
Oscilloscope
Signal adjustment
section - detailed view
Probe
BD series detector
Head connector
BS77 scale unit
