HP 8153A - Page 26

When pressing the switch on the Head Recognition Adapter the
CLOCK output should show clock pulses for approx. 4 seconds,
going from +5V to OV.
18. OE
Using the Test Cable connect the OE receptacle to the
oscilloscope.
When pressing the switch on the Head Recognition Adapter the
OE output should switch from + 5V to OV and then back to +
5V.
19. ON/OFF
Set the Oscilloscope as follows: Input to 5V jDIV.
Using the Test Cable connect the ONjOFF receptacle to the
oscilloscope.
While the switch is pressed on the Head Recognition Adapter
the ON/OFF output should stay at + 15V. When releasing the
switch, the level should be approx. + 5V.
ANALOG INPUT (8152A IN)
20. In MEASure mode select Autoranging OFF and Display in W.
21. Connect the Test Cable (P /N 15414-61603) from the P.CTRL
receptacle to the BNC connector marked with 8152A IN on the
Test/Cai Box and ZERO the HP8153A.
22. Connect the Test Cable to the ONjOFF receptacle and select the
-20dBm range using the Up Down keys.
23. Check that the HP8153A display shows approx. 12.500.
P.CTRL
24. Change the input sensivity of the oscilloscope to 0.05V jDIV
and connect the Test Cable from the P.CTRL receptacle to the
oscilloscope.
25. Watch the DC level displayed on the oscilloscope and connect
instead of the Head Recognition Adapter the HP81520A or
HP81521B Optical Head. O
26. After a few seconds, the P.CTRL voltage should change from
approx. 150 mV to approx. 40 mV (HP81521B) or from approx.
130 mV to approx. 30 mV (HP81520A).
2-6 Functional Tests
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