TB 9-4931-533-40
a. Connect the two semi-rigid links (front panel) between channel I and II of the VM-
4A and HO-2 oscillator.
b. Connect the low frequency probes to channel I and II low frequency connectors (front
panel).
c. Connect the 10 MHz reference (coaxial link) on rear panel between the VM4A and
HO-2 oscillator.
d. Connect the main VM-4A INTERFACE bus (rear panel) cable between the VM-4A
and HO-2 oscillator, and the IEEESTD-488 bus between the VM-4A and signal generator No. 1.
e. Connect ac line cords to both VM-4A and HO-2 oscillator, and connect to
autotransformers. Adjust autotransformers for 115 V ac.
f. Energize equipment and allow approximately 30 minutes for equipment to warm-up
and stabilize.
8. Attenuator Accuracy (30 MHz)
NOTE
This procedure should not be performed until TI self diagnostic
test (microprocessor and 30 MHz self test) has been
satisfactorily completed.
a. Performance Check
(1) Connect equipment as shown in figure 1, connection A.
NOTE
Insure that low frequency probes are connected.
(3) Ensure RF OFF/ON is set to ON.
(4) Press TI pushbuttons as listed in (a) through (g) below:
LOCAL (IEEE 488 BUS STATUS).
(a)
% SRCH (VM-4A) 2, and ENTER.
(b)
AUTO TUNE, (4312 GENERATOR).
(c)
TUNE (VM-4A Group).
(d)
030 and ENTER.
(e)
001 (RESOLUTION-dB).
(f)
II-I (CHANNEL).
(g)
