17.Set the HP 8560A’s sweep time to 100 ms. The voltage at 518 pin 4 should measure approximately -4.21 Vdc.

18.Set the HP 8560A’s sweep time to 200 ms. The voltage at 518 pin 4 should measure approximately -2.1 Vdc.

19.The analog switches and comparators should be set as listed in Table 10-10.

20.Check that U312D opens when the sweep time is set to 2 seconds.

21.Check that U312B and U312C close when the sweep time is set to 20 seconds.

Table 10-10. Settings for Switches and Comparators

Sweep Time

Switch

Switch

Switch

Comparator

Comparator

 

U312B

U312C

U312D

U319A Pin 1

U319B Pin 7

 

 

 

 

 

 

200 ms

Open

Open

Closed

High

High

2 s

Open

Open

Open

High

High

20 s

Closed

Closed

Open

High

High

 

 

 

 

 

 

lo-22 Synthesizer Section