Figure 6-13. Composite signal transmission level test.

TM 11-5895-1012-10

Figure 6-13. Composite signal transmission level test.

itter using a phase jitter meter is

6-16.

b. Test Equipment. The following test equipment is

required to perform this test:

(1) Test Tone Source, 1000 Hz at - 10 dbm (2 re-

(4) Performance S t a n d a r d . T h e m a x i m u m

permissable peak-to-peak phase jitter is 15 degrees.

quired).

d. In-Station Test. I n - s t a t i o n t a s t i n g i s a c -

(2) Oscilloscope.

C. Station-to-Station Test. Contact distant station

complished in the same manner as station to station

and arrange for one station to act as transmitter and

testing except the local station acts as both trans-

one as receiver. Perform the procedure below and then

mitter and receiver.

reverse roles and repeat the procedure.

6-16. Phase Jitter Test Using Phase Jitter

(1) Transmitting Circuit. If the local station is to

act as transmitter, prepare the transmitting circuit

a Purpose. This test will measure phase jitter of a

circuit between stations or within a station and deter-

If the local station is to act

mine circuit compliance with minimum operating

receiving circuit shown in

requirements. Phase jitter is the instantaneous de-

viation from the average phase of the signal and may

. At the receiving station, patch the

be caused by channel induced phase noise or by ad-

ditive amplitude noise. Phase jitter may be measured

by using a phase jitter meter or an oscilloscope.

The procedure for use with a phase jitter meter is

given below. The procedure for using an oscilloscope is

b. Teat Equipment. The following test equipment is

required to perform this test:

(1) T&Tone Source, 1000 Hz at - 10 dbm.

(2) Phase Jitter Meter.

c. Station-to-Station Test. Contact distant station

and arrange for one station to act as transmitter and

one as receiver. Perform the procedure below and then

reverse roles and repeat the procedure,

(1) Transmitting Circuit. If the local station is to

act as transmitter, prepare the transmitting circuit