KVARZ CH1-76A, Руководство по эксплуатации

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15
Table 7.1(cont.).
1 2 3 4
12,14 AFC CAVITY
Toggle switch
–
discriminator down
RF cavity AFC unit switches on.
Multi-turned potentiometer sets RF
cavity frequencies initial position.
Down
13 INDICATION Slide switch
–
switches "FRQ.ADJ"
down code or "TIME" code on
indicator.
Down
15 I Button
–
ion pump current check.
16,18 CHECK Switch
–
switches standard test points
to "CHECK" indicator in the
following positions:
1st position: 2
–
nd harmonic;
2nd position: crystal stat;
3rd position: cavity stat;
4th position: purifier current;
5th position: +27V;
6th position: +18V;
7th position: +12.6V;
8th position:
–
12.6V;
9th position: +5V;
10th position: 5

A;
11th position: 50

A;
12th position: 500

A.
Micro
–
ammeter
–
operating mode
indication of power supplies and
instrument separate units.
17 U Button
–
ion pump voltage check. Down
19 PUMP Toggle switch
–
ion pump switch on.
20 AFC SUPPLY Toggle switch
–
AFC unit switch on. Down
21 HFO
Toggle switch
–
turns on HFO of
atomic hydrogen source.
Down
22 I
HFO
Button
–
I
HFO
check
23 5 MHz Connectors
–
5 MHz signal outputs.
24 SYNCH. DET 1 Connector
–
crystal oscillator AFC
unit synchronous detector signal
output.
25 115/120/220/240V
50/400Hz
Plug
–
line frequency and voltage
selection.
Required line
frequency and
voltage
26 IF Connector
–
19.6 MHz IF signal
output used only during adjustment,
instrument repair and Zeeman
frequency (f
z
) measurement.