RF Frequency Range and Dial Accuracy

Calibration Procedure For Signal Generator An/Urm-103 (Sg-297/U) Page Navigation
5

TB 9-6625-1997-24

a. Load connectors as listed in (1) through (3) below:

(1) Connect impedance matching adapter No. 2 to LO-RF, using cable No. 1.

(2) Connect impedance matching adapter No. 3 to HI-RF, using cable No. 2.

(3) Connect impedance matching adapter No. 1 to IF, using a 50

coaxial cable.

NOTE

Do not remove impedance matching adapters until instructed

to do so.

b. Connect frequency counter A input to impedance matching adapter No. 3 located on

HI-RF connector, using cable No. 1.

c. Set power switch to OPERATE and allow sufficient time for equipment to warm-up

and stabilize.

8. RF Frequency Range and Dial Accuracy

a. Performance Check

(1) Position TI controls as listed in (a) through (d) below:

(a) FUNCTION switch to MOD OFF.

(b) BAND SWITCH to A.

NOTE

DIAL IND SET control should not be moved during test except

when changing bands.

(d) RF OUTPUT switch to 250 KUV.

(2) Adjust RF TUNING control for 18.5 MHz.

(3) Adjust LO-HI RF SET TO LINE control to red line on RF SET TO LINE

meter. If frequency counter does not indicate within limits specified in first row of table 4,

perform b below.

(4) Repeat technique of (1) through (3) above for switch settings listed in table 4. If

frequency counter does not indicate within limits specified, perform b below.