OPERATION WITH AUXILIARY LIGHT SOURCE.

In the LINE /EXT INPUT position, the power-line excitation is

automatically removed when a plug is inserted in the INPUT jack. In

the EXT INPUT positions, the RPM control adjusts the sensitivity of the

input circuit. Starting at the fully clockwise position, adjust the RPM

control until satisfactory synchronization is obtained. For large -ampli -

tude inputs, there will be a wide range of settings for the RPM control,

at which the instrument will operate satisfactorily. For small-amplitude

inputs, the range will be correspondingly smaller.

2-10. OPERATION WITH AUXILIARY LIGHT SOURCE.

2.10.1 USE W ITH TYPE 1532 STROBOLUME .

When a wider beam of light, or substantially greater light intensity

is needed, a Type 1532 Strobolume can be driven by a Type 1531 Strobotac.

A Type 1532-P3 Trigger Cable is required to connect the two instruments.

Plug the large end of the cable into the OUTPUT TRIGGER jack on

the panel of the stroboscope, and plug the other end of the cable in the

CONTACTOR jack on the Strobolume.

NOTE

The Type 1532-P2B Transformer Cable, used

with the older Type 631-BL stroboscope, cannot

be used with the Type 1531.

A Type 1531 Strobotac can also be used to drive the older Type

1532 -B, or -C Strobolume, but a modified Type 1532-P3 Trigger Cable

is required to connect the two instruments. To modify the cable, simply

replace the phone plug (small end) with the twist -lock plug required for

the older type Strobolume.

2.10.2 USE WITH TYPE 1539 STROBOSLAVE.

The Type 1539 Stroboslave is used with the stroboscope when a

second light source is needed, or when a difficult-to-illuminate object

requires the use of a compact light source, mounted at the end of a flex-

ible cord (see Figure 2-3). Since the Stroboslave has no internal oscil -

later, the trigger signal is supplied by the Type 1531 stroboscope through

a Type 1531 -P4 Trigger Cable. Plug the large end of this cable into the

OUTPUT TRIGGER jack on the panel of the stroboscope, and plug the

other end into the INPUT jack on the panel of the Type 1539 Stroboslave.

2.10.3 MULTIPLE STROBOSCOPE USES.

A second Type 1531, or a Type 1538 stroboscope, can be used in

conjunction with the Type 1531 when a second source of flashing light is

needed. A Type 1531 -P4 Trigger Cable is required to connect the two

instruments. Plug the large end of the cable into the OUTPUT TRIGGER

jack of the "master" Type 1531. Then, plug the small end into the IN-

PUT jack of the "slave" stroboscope; either a Type 1531 or a Type 1538.